SEB TM - nitta.co.jp

SUPER ENDLESS BELT

SEB TM

　　B-SE-05E　20011000U

http://www.nitta.com.tw

Headquarters: Chia Hsin Building 10FL Room No. 1005, 96 Chung Shan North Road Section 2,Taipei,TaiwanPhone:+886-2-2581-6296 Fax:+886-3-469-0260

The specification is subject to change for improvement without notice.

http://www.nitta.co.in

Gat No 191, 192, and 193, Plot No B, Village Vadhu Khurd,Taluka Haveli Dist Pune-412216, INDIAPhone:+91-20-6731-3400 Fax:+91-20-6731-3401

53, Suchul-daero 5-gil, Gumi-si, Gyeongbuk-do, 39266, KOREAPhone:+82-54-461-5575 Fax:+82-54-461-5350http://www.nitta.co.kr/

http://www.nitta-cn.com

Room2705, Shenggao International Building, No.137 XianxiaRoad,Shanghai 200051 CHINAPhone:+86-21-6229-6000 Fax:+86-21-6229-9606

http://www.nitta.nl

Berenkoog 25, 1822 B.H. Alkmaar,The NetherlandsPhone:+31-72-5622234 Fax:+31-72-5613238

http://www.nitta.com

7605 Nitta Drive, Suwanee,GA 30024, U.S.A.Phone:+1-770-497-0212 Fax:+1-770-623-1398

https://www.nitta.co.jp/en

4-4-26 Sakuragawa Naniwa-ku,Osaka 556-0022 JapanPhone:+81-6-6563-1225 Fax:+81-6-6563-1242

http://www.nitta.de

Heerdter Lohweg 35, 40549 Dusseldorf,GermanyPhone:49-211-537535-0 Fax:+49-211-537535-35

http://www.nitta.com.sg<Liaison Office> Indonesia, Vietnam

120 Lower Delta Road, #05-07/08Cendex Centre,Singapore 169208Phone:+65-6438-8738 Fax:+65-6438-8793

http://www.nittathai.com

7/472 Moo 6,Tambol Mabyangporn, Amphur Pluakdaeng, Rayong Province 21140, THAILANDPhone:+66-38-018-301 Fax:+66-38-018-304

http://www.nitta.com.br

Rua Francisco Mommenshon,50B,Galpão 02Laranjeiras,Caieiras,São Paulo,BrazilPhone/Fax:+55-11-4441-2922

405 Industrial Drive Unit 3-8, Milton, Ontario Canada L9T 5B1

http://www.connectbelting.comPhone:+1-905-878-5552 FAX:+1-905-878-0344

Since entering the new century, automation has been progressing remarkably. To develop OA (Office Automation), FA (Factory Automation) and SA (Store Automation), further sophisticated equipment is needed.Nitta Corporation has been continuously researching and developing SEBTM (Super Endless Belt) since its appearance on the market, giving first priority to customer sat isfact ion and meeting the demands of the t imes. As a result , the superior performance of SEB has produced high reliability.In 1996, Nitta obtained ISO 9001 certification and is ready to supply products that fit the increasingly globalized world, through the appropriate quality assurance system.We provide various types of belts to meet any of your demands.

Table of Contents

Excellent FeaturesMajor ApplicationsBelt Structure and PropertiesList of ProductsTypes, Properties and Inner Peripheral Length Pinching Conveyor Belt N Series Conveyor and Low-Load Power Transmission Belt G15 Series Conveyor and Low-Load Power Transmission Belt G 30 Series Conveyor and Medium-Load Power Transmission Belt F50 Series Conveyor and Medium-Load Power Transmission Belt F100 Series Medium-Load Power Transmission Belt XA/A Series High-Load Power Transmission Belt B/D/GS Series High-Temperature Conveyor and Low-Load Power Transmission Belt H50 SeriesSelecting Belt Selecting Conditions/Procedures Selecting Type/StructureDesign Materials Transmitted Power Correction Factor (K1) According to Load Change Belt Type Selection Diagram and Traction Coefficient (λ)Calculation for Selecting BeltDesign CalculationFormulas and Conversion TableCalculating Belt Inner Peripheral LengthBelt Inner Peripheral Length NomographFlat Pulley and Recommended Shape of PulleyFor Correct Use (Precautions for use)TroubleshootingFor Safe Use of Products

..................................................................................................1

..................................................................................................2.....................................................................................3

..............................................................................................4 to 5

.....................................................................6 to 7.................................8 to 9............................10 to 11

........................12 to 13

........................14 to 15..........................................16 to 17..........................................18 to 19

.....20 to 21

............................................................................22......................................................................................23

..............................24..............................................25

...................................................................................26......................................................................................27 to 28

...............................................................................29.....................................................................30....................................................................31

...................................................32 to 33...............................................................34 to 35

...................................................................................................36........................................................................................37

Excellent FeaturesSeamless Belt

Molded seamless belt with excellent dimensional stability

High Revolution AccuracyStable pitch line of the seamless belt ensures high revolution accuracy.

Maintenance FreeExcellent tension retaining propertiesMaintenance (belt replacement, etc.) unnecessary for a long time

A Variety of TypesYou can select a belt appropriate for your use from a variety of belts with different surface materials, tension members, structures, etc.

High Environmental ResistanceHigh resistance to environment including cold, heat and ozoneSuitable for a wide range of uses

High Oil/Chemical ResistanceHighly resistant to almost all chemicalsSuitable for a wide range of power transmission and conveyance

Compatible with Small Pulley DiameterThin, highly flexible, bendable, abrasion resistant and durable; SEB provides superior performance when used for precision power transmission equipment and conveyors with small pulleys.

Suitable for Every Place and Every Use Belt Structure and PropertiesMajor Applications

Conveyance

Powertransmission

Pinching conveyance

[Belt cross section]

[Features]

[Labeling]

Series Structure Width (mm) Inner peripheral length (mm)

Thickness (mm)[Un necessary for the standard specification]

Example:

High friction against theconveyor surface

High friction against theconveyor surface

[Conveying paper sheets pinched between belts]

N (G15/G30/F50/F100) -S□□ Type

Rubber Properties by Belt Types

N (G15/G30/F50/F100) -L□□ Type

General conveyance

ATM (Automatic Teller Machine)/Coin conveyor

Impregnated surface (Media surface)

Polished surface(Media surface)

Tension member

Polished surface(Pulley surface)

Tension member

Glossy surface(Pulley surface)

Change machine

Ticket-vending machine

Automatic ticket checker

Card conveyor

Transportation of electronic components

Heat resistant conveyance Laser beam printer

Bill validator

High-friction conveyance Folder gluer (feeder)

High-speed power transmission General industrial machine

Low-load power transmission OA equipment

Minute torque precision powertransmission Card reader

(Fans and blowers)

Machine tool(Internal grinder, machining center, milling machine)

Wood working machine

Textile machine (Draw texturing machine, open-end spinner, loom)

Automatic postal address-readingand sorting machine (feeder)

Fare box

Automatic game machine

The tension member is on the impregnated surface side; there is not much difference between the belt speed and the media speed.The facing tension members are close to each other; even in a

winding layout, there is not much dif ference among the belt speeds.Due to l i t t le difference among the speeds, sl iding resistance

( load caused by the p inching layout) is low, thus reducing power consumption of the machine.

[Belt cross section]

[Features][Conveying hard cards pinched between belts]When a card contacts with a belt at a sharp angle (on a pulley)

dur ing car ry ing- in /ou t , damage to the tens ion member i s absorbed by the surface rubber.

Properties

Excellent as a feeder belt Especially excellent Excellent Examination needed depending on use conditions Poor

Belt Type Crack resistance Abrasion resistance Oil resistance Ozone resistance Heat resistance Antistatic property

N-SMV1 N-LBUN-SMV2

A-PB

A-NR

A-OBA

G15-LBU G30-LBU

F50-SBC

F100-LBU F50-LBUF50-SBU

F50-SBU F100-SBU

G15-SBU G30-SBUG15-SBC2

H50-LIF H50-SBF

H50-LIF H50-SBF

A-NR A-WN

B-PB D-PB

A-PB B-PB D-PB

A-PB B-PB D-PB

A-PB B-PB

N-SMV1 G15-SBUN-SMV2

N-SMV1 G15-SBUN-SMV2

G15 0.65T300L15WSBU

2 32

N-SMV1,V2

N-LBU

G15, G30

F50

F100

H50

XA, A, B, D

A

A

B

A

A

GS

-PB

-□BU

-□BC

-□B

-PC

-OBA

-PSS

-OC

-NR

-WN

1

1

1

List of Products (SEBTM)

A variety of products available to meet your needs accurately and efficientlyC

onve

yanc

e

Pow

er tr

ansm

issi

onMajor Applications Series Type Properties

Approximate Range of Standard Belt Transmitted Power (per 10 mm width)Page

Recommendedelongation rate (%)

BreakingStrength

(N/mm width)Structure

High-stretchseamlessknit fabric

Polyester High stretch and high precision conveyance

High precision conveyanceMinute torque power transmissionPrecision power transmission

Approximate range of use

High-precision conveyanceSmall torque power transmissionPrecision power transmission

Low-load power transmissionHigh-speed conveyance

Low-load power ransmissionHigh-speed conveyance

Low-torque, high-speed power transmission

Medium-torque power transmissionHigh-speed power transmission

High modulusSliding conveyance

High-torque power transmission

Low-torque power transmissionHigh-speed power transmissionLow vibration

High-temperature conveyanceHigh-temperature, low-torque power transmission

Polyester

Seamless wovenfabric

Cord

Seamlesswoven fabric

Specialheat-resistant

fiber

Heat resistant, lightweightconveyance and

power transmission

Polyester

Polyester

Glass fiber

MaterialTension member

NLBUSMV1SMV2SBULBUSBC1SBC2LBCSBLBSBULBUSBC1SBC2LBCLBSBULBUSBC2LBCSBLBSBULBUSBC2LBCSBLB

PB

PBPCOBANRWNPBPSSPB

OC

LIFSIF

5.0

2.0

2.0

2.0

11.8101 102

6to7

8to9

14to15

16to17

20to21

18to19

12to13

10to11

6.86

8.24N 22.75N

13.24N 36.38N

24.81N 68.25N

8.24N 22.75N

99.34N 273.11N

6.18N 34.12N

49.62N 136.51N

12.36N 34.12N

12.36N 68.25N

5.00N 13.6N

2.45N 6.86N

1.95N 5.48N

1.47N 4.12N

9.31

8.83

17.7

24.5

39.2

29.4

58.8

118

235

216

24.5

2.0

1.0

1.0

0.50.5

1.0

1.0

0.3

2.0LBF

G15

G30

F50

F100

XA

A

B

D

GS

H50

4 5

Pinching Conveyor Belt Standard Dimensional Tolerance

SeriesFeature: High-stretch, high-precision conveyor belt; easy installation available even in a complicated layoutUse: Pinching conveyance for ATM and ticket-vending machinesCross Section

[Fig. 1] Structure of N-SMV□ Type [Fig. 2] Structure of N-LBU TypeImpregnated

surfacePolished

surface

Glossysurface

Polyesterseamless

woven fabric

Polished surface

Polyesterseamless

woven fabric

Types and Properties

Item

Structure

Available width (mm)

Standard thickness (mm)

Rubber material

Surface figure

Pulley surface figure

Weight

(1) Width (mm)

(3)N-SMV1/SMV2 (Thickness: 0.65 mm): List of Inner Peripheral Lengths (mm)

(2)Thickness (mm)Width

Less than 200

Tolerance: ± 2

200 or more andless than 300

Tolerance: ± 3


Tolerance: ± 4


Tolerance: ± 6


Tolerance: ± 7

1100 or more

Tolerance: ± 0.8 %

(4)N-LBU (Thickness: 1.0 mm): List of Inner Peripheral Lengths (mm)Less than 200

If you wish to order a product with a size other than the standard, consult us.SEB is built to order; the minimum order quantity is one lot. For details, contact our agencies or our sales representative.

Tolerance: ± 2


Tolerance: ± 3


Tolerance: ± 4


Tolerance: ± 6


Tolerance: ± 7

1100 or more

Tolerance: ± 0.8 %

Tolerance Thickness Tolerance

Minimum pulley diameter (mm)

Operating temperature range

Fig. 1 Fig. 1 Fig. 2

Millableurethane

Frictioncoefficient

Millableurethane

Impregnatedsurface

Breaking strength (N/mm width)

Standard elongation rate (%)

Impregnatedsurface

Polishedsurface

Polishedsurface

PolishedsurfaceGlossysurface

Millableurethane

Axial load at the standard elongationrate under stable conditions (N/mm width)

Top surface(against paper sheet)Bottom surface(against SUS)



0.6 or more andless than 0.8


1.0 or more

101 or more


1

2

3

4

5

6

7

8

9

10

11

12

13

N-SMV1 N-SMV2 N-LBU

8~200 8~200 8~200

0.65 0.65 1.0

8 8 12

6.86 9.31 11.8

5.0 5.0 5.0

0.88 1.18 0.98

0.3to0.6 0.3to0.6 0.4to0.8

0.4to0.8 0.4to0.8 0.5to1.0

88 10

20to　60 20to　60 20to　60

6 7

0.3

0.5

1.0

1.5

80.082.084.086.090.093.097.0

100.0101.0103.0104.0106.0107.0108.0110.0111.0112.0113.0114.0115.0116.0117.0118.0　　

120.0123.0125.0127.0128.0129.0130.0132.0133.0135.0138.0139.0139.5140.0142.0143.0144.0145.0146.0149.0150.0151.0154.0　　

248.0249.0251.0252.0254.0256.0261.0264.0267.0270.0272.0275.0277.0278.0282.0283.0285.0285.5286.0287.0288.0290.0292.0297.0299.0　　

201.0202.0204.0205.0206.0208.0212.0213.0214.0218.0222.0222.5223.0225.0228.0230.0235.0237.0238.0240.0241.0243.5244.0246.0246.5247.0　　

155.0156.0160.0161.0163.0164.0167.0168.0171.0173.0176.0177.0180.0181.0182.0184.0186.0190.0192.0193.0195.0199.0

　　

300.0301.0304.0305.0306.0309.0310.0313.0318.0320.0322.0325.0326.0328.0329.0330.0332.0339.0345.0349.0350.0352.0358.0　　

362.0367.0371.0372.0376.0381.0384.0388.0390.0391.0393.0397.0402.0406.0410.0411.0412.0414.0416.0420.0421.0423.0424.0

　　

425.0426.0427.0429.0431.0437.0443.0447.0452.0454.0457.0458.0459.0464.0467.0468.0470.0474.0482.0493.0495.0

　　

0.05

0.06

0.10

804.0820.0835.0854.0855.0856.0862.0873.0882.0883.0904.0914.0919.0941.0956.0966.0979.0986.0

1001.01007.01022.01027.01029.0　　

1033.01048.01057.01066.01072.01073.01078.01080.01088.01096.0　　

1108.01123.01143.01149.01150.01171.01181.01198.01208.01213.01238.01259.01270.01279.01309.01317.01341.01356.01405.01425.01441.01457.01488.0　　

1504.01543.01558.0

　　

503.0505.0510.0519.0522.0529.0533.0536.0537.0542.0545.0548.0552.0557.0559.0563.5564.0572.0578.0583.0586.0589.0590.0　　

593.0595.0600.0604.0607.0614.0619.0630.0639.0642.0653.0655.0661.0665.0669.0674.0680.0689.0697.0700.0704.0711.0712.0

　　

724.0734.0740.0747.0754.0756.0760.0765.0770.0775.0790.0

　　

252.5254.0255.0257.5259.5264.0266.5270.5273.5275.5277.5280.5281.0284.5285.0286.5288.0288.5290.0291.0293.5295.0　　

201.5203.5205.0207.5208.5211.5214.5215.5216.5217.5220.5224.5225.5228.5231.5233.0238.5239.0241.5243.5244.0247.0249.0249.5250.5　　

82.584.086.088.093.095.596.599.5

103.0104.0106.0106.5108.5109.0111.0112.0113.0114.5115.5116.0117.5119.0119.5　　

121.0121.5125.0127.5129.0131.0132.5134.5136.0138.0140.5141.5142.0143.0145.0146.0147.5149.0152.0153.0153.5156.5158.0　　

160.0162.5164.0166.0167.0170.0171.0174.0176.0179.0180.5183.5184.5187.5189.5192.5194.5196.0197.5

　　

300.0302.5303.0304.5307.0309.0310.0312.5316.0321.5323.0325.0328.5329.0331.5332.0335.0342.0349.0353.0354.0355.0361.0　　

365.5371.0374.0375.0376.0380.0385.0388.0391.0393.5397.0400.0401.0405.5409.0413.5415.0416.0417.0419.0423.0425.0426.5

　　

427.5428.5429.0430.0433.0435.0441.0447.0451.0456.0458.0460.5463.0467.5471.0474.0478.0486.0496.5499.0

　　

809.0824.5840.0859.0859.5866.5878.5886.5909.0919.0923.5946.0961.0972.0974.0991.0

1007.01012.01027.01032.51034.51038.51053.5　　

1063.01071.51077.01079.01083.01085.51094.0　　

1102.01113.51128.51149.01155.01156.01177.01187.01204.51214.01219.51244.01265.01276.01285.01315.51323.51347.01362.01412.01432.01447.01464.0　　

1495.01511.01550.01565.0

　　

506.5508.5514.0523.0523.5526.5533.0538.0540.5546.0549.0552.0556.5561.0562.5563.0567.5568.0576.5582.0587.5590.0593.5　　

597.0599.5604.0608.0611.0618.5623.5634.5640.5643.0646.5657.0659.0665.0669.5673.5678.0684.0693.0701.0704.5709.0716.0

　　

716.5728.5738.5745.0751.5759.0764.0770.0773.0779.5794.0

　　

N

Conveyor and Low-Load Power Transmission Belt

SeriesFeature: This belt, which uses thin, polyester seamless woven fabric as a tension member, is applied to conveyance and low-load power transmission.Use: ATM, copy machine sorters, minute-torque precision power transmission, OA equipment, etc.Cross Section

[Fig.3] Structure of G15-SB□ /SBC2 Type

[Fig.5] Structure of G15-SBC1 Type

[Fig.4] Structure of G15-LB□ TypeImpregnated

surfacePolished

surface

Glossysurface

Glossysurface

Smoothsurface

Polishedsurface

Polyesterseamless

woven fabric

Polyesterseamless

woven fabric

Polyesterseamless

woven fabric

Types and PropertiesItem

Structure



Rubber material

Surface figure


Weight



Frictioncoefficient(against SUS)


Standard elongation rate (%)Axial load at the standard elongationrate under stable conditions (N/mm width)

Top surface

Pulley surface

Fig. 5Fig. 3 Fig. 4 Fig. 3 Fig. 4Fig. 3 Fig. 4

Millableurethane

Millableurethane

Chloroprenerubber

Chloroprenerubber

Chloroprenerubber Nitrile rubber Nitrile rubber

Impregnatedsurface

Polishedsurface

Polishedsurface

Glossy surface

Smooth surface

Glossy surface

Impregnatedsurface

Polishedsurface

Polishedsurface

Glossy surface

Impregnatedsurface

Polishedsurface

Polishedsurface

Glossy surface

Standard Dimensional Tolerance(1) Width (mm) (2)Thickness (mm)

Width Tolerance Thickness Tolerance

*See (3) of P. 11.




101 or more



1.0 or more

(3) G15-SB/SBU/SBC2/G30-SBC* Type: List of Inner Peripheral Lengths (mm)Inner peripheral length of less than 300

Tolerance: ± 2 mm

300 or more and less than 500

Tolerance: ± 3 mm


Tolerance: ± 4 mm


Tolerance: ± 4.5 mm



1100 or more

Tolerance: ± 0.5 %

Inner peripheral length of less than 300

Tolerance: ± 2 mm


Tolerance: ± 3 mm


Tolerance: ± 4 mm





1100 or more

Tolerance: ± 0.5 %

If you wish to order a product with a size other than the standard, consult us.SEB is built to order; the minimum order quantity is one lot. For details, contact our agencies or our sales representative

*For G15-SBC1 only

1

2

3

4

5

6

7

8

9

10

11

12

13

3to2003to200 3to200 3to200 3to200 3to200 3to200

0.5to1.00.4to0.8 0.4to0.9 0.4to0.8 0.5to1.0 0.4to0.8 0.5to1.0

0.4to0.80.3to0.6 0.4to0.9 0.3to0.6 0.4to0.8 0.3to0.6 0.4to0.8

G15-LBG15-SBG15-LBCG15-SBC2G15-SBC1G15-LBUG15-SBU

1.471.471.471.471.471.471.47

2.02.02.02.02.02.02.0

8.838.838.838.838.838.838.83

106.51064.5106.5

1.00.651.00.60.431.00.65

6 6 85 10 10 15

20to　60

0.3

0.5

1.0

1.5

0.050.43

0.05

0.06

0.10

97.0100.5101.0103.5104.0105.5106.5108.5109.5110.5112.5113.5114.0115.0116.5117.5118.5120.0123.0125.0127.0128.5129.5130.0132.0133.5135.5

138.0139.0139.5140.5142.0143.5145.0146.0149.5150.5151.0154.0156.0157.5160.0161.5163.5164.5167.0168.0171.0173.5176.0177.5180.5182.0185.0

186.0190.0192.0193.5195.0198.5201.0202.5205.5206.0209.0212.0213.5215.0218.0222.0223.0226.0229.0230.5236.0237.0238.5240.5241.5244.5246.5

300.0300.5302.0304.5306.0307.0310.0313.5319.0320.5322.5325.5326.5329.0329.5330.0332.5339.5346.0350.5351.0352.5358.5363.0368.5372.0372.5　　　　

504.0506.0511.0511.5520.0520.5524.0530.0535.0538.0543.5546.5549.5554.0558.0558.5560.0560.5565.0565.5573.5579.5585.0587.5591.0594.5597.0　　　　

1111.01126.01146.51152.01153.51174.51184.51202.01211.51217.01241.51262.51273.51282.51313.01321.01344.51359.51409.01429.51445.01461.51492.51508.51547.51562.5　　　　

702.0706.5713.0714.0726.0736.0741.5742.5749.0756.5761.5767.5770.5777.0791.5806.5822.0837.5856.5857.0864.5876.0884.0　　　　

906.5916.5920.5943.5958.5969.0982.0988.5

1004.51009.01024.51030.01032.01036.01051.01060.51069.01074.51076.51081.01083.01091.01099.5　　　　

601.5605.5608.5616.0621.0632.0640.5644.0654.5656.5662.5667.0671.0675.5681.5690.5698.5　　

373.5377.5382.0385.5389.0391.5394.5398.5403.0406.5411.0412.5413.5414.5416.5420.5422.5425.0426.0426.5427.5430.5432.5438.5444.5448.5453.0　　　　

455.0458.0460.5465.0468.5471.5475.5483.5494.0496.0　　　　

247.0247.5250.0251.5252.5255.0256.5261.0264.5267.5271.0273.0275.5277.5278.5282.5284.0285.0286.0287.5288.5291.0292.5297.5

98.5102.0102.5105.0105.5107.5108.0110.0111.5112.5114.0114.5115.0116.5118.0119.0120.0121.0124.5126.5128.5130.0131.0131.5133.5135.0137.0　　　　

139.5140.5141.5142.0144.0145.0146.5148.0151.0152.0152.5155.5157.5159.0161.5163.0165.0166.0169.0170.0172.5175.0177.5179.5182.5184.0186.5　　　　

188.0191.5193.5195.0196.5200.5202.5204.0205.0206.5207.5210.5213.5214.5215.5216.5219.5223.5224.5227.5230.5232.0237.5238.5240.5242.5243.0　　　　

301.5302.0303.5306.0308.5309.0311.5315.0320.5322.0324.0327.5328.0330.5331.0332.0334.0341.0348.0352.0353.0354.0360.0364.5370.0373.0374.0　　　　

505.5507.5513.0522.0522.5525.5532.0537.0539.5545.0548.0551.0555.5560.0561.0561.5566.5567.0575.5581.0586.5589.0592.5596.0598.5603.0607.0　　　　

1101.01112.51127.51148.01154.01155.01176.01186.01203.51213.01218.51243.01264.01275.01284.01314.51322.51346.01361.01411.01431.01446.51463.01494.01510.01549.01564.0　　　　

700.0703.5708.0715.0715.5727.5737.5744.0750.5758.0763.0769.0772.0778.5793.0808.0823.5839.0858.5866.0877.5885.5　　　　

908.0918.0922.5945.0960.0971.0984.0990.0

1006.01010.51026.01030.01033.51037.51052.51062.01070.51076.01078.01082.01084.51093.0　　　　

610.0617.5622.5633.5642.0645.5656.0658.0664.0668.5672.5677.0683.0692.0

375.0379.0384.0387.0390.5393.0396.0400.0404.5408.0412.5414.0415.0416.0418.0422.0424.0425.5426.5427.5428.0429.0432.0434.0440.0446.0450.0　　　　

455.0456.5459.5462.0466.5470.0473.0477.0485.0495.5498.0　　　　

246.0248.0248.5249.0251.5253.0254.0256.5258.5263.0265.5269.5272.5274.5277.0279.5280.0284.0285.5287.0287.5289.0290.0292.5294.0299.0　　　　

8 9

20to　60 20to　80 20to　80 20to　80 20to　80 20to　80

G15

(4) G15-LB□/SBC1 Type: List of Inner Peripheral Lengths (mm)

Conveyor and Low-Load Power Transmission Belt

SeriesFeature: This belt, which uses thin, polyester seamless woven fabric as a tension member, is applied to conveyance and low-load power transmission.Use: ATM, copy machine sorters, minute-torque precision power transmission, OA equipment, etc.Cross Section

[Fig.6] Structure of G30-SBU,SBC2 Type

[Fig.8] Structure of G30-SBC1 Type

[Fig.7] Structure of G30-LB□ TypeImpregnated

surfacePolished

surface

Glossysurface

Glossysurface

Smoothsurface

Polishedsurface

Polyesterseamless

woven fabric

Polyesterseamless

woven fabric

Polyesterseamless

woven fabric

Item

Structure



Rubber material

Surface figure


Weight




Friction coefficient (against SUS)

Standard elongation rate (%) Axial load at the standard elongation rate under stable conditions (N/mm width)

Top surface

Pulley surface


Millableurethane

Millableurethane

Chloroprenerubber

Chloroprenerubber

Chloroprenerubber Nitrile rubber

Fig. 8Fig. 6 Fig. 7 Fig. 7Fig. 6 Fig. 7

Impregnatedsurface

Polishedsurface

Polishedsurface

Glossy surface

Smooth surface

Glossy surface

Impregnatedsurface

Polishedsurface

Polishedsurface

Glossy surface

Polishedsurface

Glossy surface


Width Tolerance3 or more andless than 11



101 or more

Thickness Tolerance



1.0 or more

*For G30-SBC2, see (3) of P. 9.

*For G30-SBC1 only

(3) G30-SBU (Thickness: 0.8 mm) Type: List of Inner Peripheral Lengths (mm)

(4) G30-LB□/SBC1 Type: List of Inner Peripheral Lengths (mm)

If you wish to order a product with a size other than the standard, consult us.SEB is built to order; the minimum order quantity is one lot.

Less than 300

Tolerance: ± 2 mm


Tolerance: ± 3 mm


Tolerance: ± 4 mm





1100 or more

Tolerance: ± 0.5 %

Less than 300

Tolerance: ± 2 mm


Tolerance: ± 3 mm


Tolerance: ± 4 mm





1100 or more

Tolerance: ± 0.5 %

0.3

0.5

1.0

1.5

0.05

0.05

0.06

0.10

0.50

10 11

1

2

3

4

5

6

7

8

9

10

11

12

13

3to2003to200 3to200 3to200 3to200 3to200

0.5to1.00.4to0.8 0.4to0.9 0.4to0.8 0.5to1.0 0.5to1.0

0.4to0.80.3to0.6 0.4to0.9 0.3to0.6 0.4to0.8 0.4to0.8

G30-LBG30-LBCG30-SBC2G30-SBC1G30-LBUG30-SBU

1.01.00.60.51.00.8

101065108

2.942.942.942.942.942.94

2.02.02.02.02.02.0

17.717.717.717.717.717.7

8 65 10 10 15

20to　60 20to　60 20to　80 20to　80 20to　80 20to　80

96.599.0

100.0102.0102.5104.5106.0107.5108.5110.0111.5112.5113.0114.0115.0117.0118.0119.5122.5124.5126.0127.5128.5129.0130.5132.5134.5

137.5138.0139.5141.5142.0143.5145.5149.0150.0150.5153.5154.0157.0158.5160.5162.5163.5166.5167.5170.5172.0175.5177.0180.0181.0184.0189.0　　　　

190.5192.5194.0198.0200.0201.5205.0206.0208.0211.5213.0213.5217.0221.0222.0225.0228.0229.5234.5236.0238.0240.0240.5244.0245.5246.0246.5　　　　

301.0303.5305.5307.0309.0313.0318.0319.0321.5325.5326.0328.0329.0332.0339.0345.5349.5350.0351.5358.0361.5368.0372.0372.5374.0377.0381.5　　　　

502.5504.5510.5518.5522.5529.0533.0537.5543.0545.5548.5552.5558.0560.0563.5573.5578.5584.0587.0590.0593.5596.0600.5604.5607.5615.0620.0　　　　

1108.01123.51144.01150.01150.51171.51181.51199.51208.51214.51239.51261.01271.01280.51310.51318.51343.01358.51407.01427.51442.51459.01489.51505.51545.01560.0　　　　

701.0706.0712.5713.0725.0735.0742.0748.0755.5760.5765.5770.5776.0790.5805.5821.0836.0856.0863.0874.5883.5　　　　

905.0914.5920.0942.5958.0967.5980.5987.5

1004.01008.01022.51029.01031.01033.51048.51058.01068.01074.01075.01079.01081.51088.51097.0　　　　

631.5639.5643.0654.0655.0660.5666.0670.0674.5681.0690.0698.0　　

385.0388.0389.5393.5397.5402.0405.5410.0411.0412.5413.5414.0415.5419.0422.0424.5425.0426.0427.0430.0431.5438.0443.0447.5451.0454.5457.0　　　　

460.0463.5467.5470.5475.0482.5493.0495.0　　　　

247.0249.0250.0251.5254.5256.0259.5260.0263.5266.5270.0272.0274.0276.5278.0281.0283.0284.5285.0286.0288.0290.0292.0297.0299.0299.5　　　　

98.5102.0102.5105.0105.5107.5108.0110.0111.5112.5114.0114.5115.0116.5118.0119.0120.0121.0124.5126.5128.5130.0131.0131.5133.5135.0137.0　　　　

139.5140.5141.5142.0144.0145.0146.5148.0151.0152.0152.5155.5157.5159.0161.5163.0165.0166.0169.0170.0172.5175.0177.5179.5182.5184.0186.5　　　　

188.0191.5193.5195.0196.5200.5202.5204.0205.0206.5207.5210.5213.5214.5215.5216.5219.5223.5224.5227.5230.5232.0237.5238.5240.5242.5243.0　　　　

301.5302.0303.5306.0308.5309.0311.5315.0320.5322.0324.0327.5328.0330.5331.0332.0334.0341.0348.0352.0353.0354.0360.0364.5370.0373.0374.0　　　　

505.5507.5513.0522.0522.5525.5532.0537.0539.5545.0548.0551.0555.5560.0561.0561.5566.5567.0575.5581.0586.5589.0592.5596.0598.5603.0607.0　　　　

1101.01112.51127.51148.01154.01155.01176.01186.01203.51213.01218.51243.01264.01275.01284.01314.51322.51346.01361.01411.01431.01446.51463.01494.01510.01549.01564.0　　　　

700.0703.5708.0715.0715.5727.5737.5744.0750.5758.0763.0769.0772.0778.5793.0808.0823.5839.0858.5866.0877.5885.5　　　　

908.0918.0922.5945.0960.0971.0984.0990.0

1006.01010.51026.01030.01033.51037.51052.51062.01070.51076.01078.01082.01084.51093.0　　　　

610.0617.5622.5633.5642.0645.5656.0658.0664.0668.5672.5677.0683.0692.0

375.0379.0384.0387.0390.5393.0396.0400.0404.5408.0412.5414.0415.0416.0418.0422.0424.0425.5426.5427.5428.0429.0432.0434.0440.0446.0450.0　　　　

455.0456.5459.5462.0466.5470.0473.0477.0485.0495.5498.0　　　　

246.0248.0248.5249.0251.5253.0254.0256.5258.5263.0265.5269.5272.5274.5277.0279.5280.0284.0285.5287.0287.5289.0290.0292.5294.0299.0　　　　

G30

Conveyor and Medium-Load Power Transmission Belt

SeriesFeature: This belt, which uses polyester seamless woven fabric as a tension member, is applied to conveyance and power transmission.Use: OA equipment, ticket-vending machines, ATM, etc.Cross Section

[Fig.9] Structure of F50-SB□Type [Fig.10] Structure of F50-LB□TypeImpregnated

surface

Polishedsurface

Polishedsurface

Glossy surface

Polyesterseamless

woven fabricPolyesterseamless

woven fabric


Structure



Rubber material

Surface figure


Weight






Top surface

Pulley surface


Millableurethane

Millableurethane

Chloroprenerubber


Impregnatedsurface

Polishedsurface

Polishedsurface

Glossy surface

Impregnatedsurface

Polishedsurface

Polishedsurface

Glossy surface

Impregnatedsurface

Polishedsurface

Polishedsurface

Glossy surface


Width Tolerance Thickness Tolerance5 or more andless than 11



101 or more


1.0 or more

(3) F50-SB□ (Thickness: 0.8 mm) Type: List of Inner Peripheral Lengths (mm)

(4) F50-LB□ (Thickness: 1.0 mm) Type: List of Inner Peripheral Lengths (mm)


Tolerance: ± 2 mm


Tolerance: ± 3 mm


Tolerance: ± 4 mm





1100 or more

Tolerance: ± 0.5 %


Tolerance: ± 2 mm


Tolerance: ± 3 mm


Tolerance: ± 4 mm





1100 or more

Tolerance: ± 0.5 %


1

2

3

4

5

6

7

8

9

10

11

12

13

F50-LBF50-SBF50-LBCF50-SBC2F50-LBUF50-SBU

4.94.9 4.9 4.9 4.9 4.9

2.02.0 2.0 2.0 2.0 2.0

24.524.5 24.5 24.5 24.5 24.5

108 8 10 8 10

1.00.8 0.8 1.0 0.8 1.0

5to2005to200 5to200 5to200 5to200 5to200

0.5to1.00.4to0.8 0.4to0.8 0.5to1.0 0.4to0.8 0.5to1.0

0.4to0.80.3to0.6 0.3to0.6 0.4to0.8 0.3to0.6 0.4to0.8

10 15 2010 15 15

20to　60

0.3

0.5

1.0

1.5

0.06

0.10

96.599.0

100.0102.0102.5104.5106.0107.5108.5110.0111.5112.5113.0114.0115.0117.0118.0119.5122.5124.5126.0127.5128.5129.0130.5132.5134.5　　　　

137.5138.0139.5141.5142.0143.5145.5149.0150.0150.5153.5154.0157.0158.5160.5162.5163.5166.5167.5170.5172.0175.5177.0180.0181.0184.0189.0　　　　

190.5192.5194.0198.0200.0201.5205.0206.0208.0211.5213.0213.5217.0221.0222.0225.0228.0229.5234.5236.0238.0240.0240.5244.0245.5246.0246.5　　　　

301.0303.5305.5307.0309.0313.0318.0319.0321.5325.5326.0328.0329.0332.0339.0345.5349.5350.0351.5358.0361.5368.0372.0372.5374.0377.0381.5　　　　

502.5504.5510.5518.5522.5529.0533.0537.5543.0545.5548.5552.5558.0560.0563.5573.5578.5584.0587.0590.0593.5596.0600.5604.5607.5615.0620.0　　　　

1108.01123.51144.01150.01150.51171.51181.51199.51208.51214.51239.51261.01271.01280.51310.51318.51343.01358.51407.01427.51442.51459.01489.51505.51545.01560.0　　　　

701.0706.0712.5713.0725.0735.0742.0748.0755.5760.5765.5770.5776.0790.5805.5821.0836.0856.0863.0874.5883.5　　　　

905.0914.5920.0942.5958.0967.5980.5987.5

1004.01008.01022.51029.01031.01033.51048.51058.01068.01074.01075.01079.01081.51088.51097.0　　　　

631.5639.5643.0654.0655.0660.5666.0670.0674.5681.0690.0698.0　　

385.0388.0389.5393.5397.5402.0405.5410.0411.0412.5413.5414.0415.5419.0422.0424.5425.0426.0427.0430.0431.5438.0443.0447.5451.0454.5457.0　　　　

460.0463.5467.5470.5475.0482.5493.0495.0　　　　

247.0249.0250.0251.5254.5256.0259.5260.0263.5266.5270.0272.0274.0276.5278.0281.0283.0284.5285.0286.0288.0290.0292.0297.0299.0299.5　　　　

98.5102.0102.5105.0105.5107.5108.0110.0111.5112.5114.0114.5115.0116.5118.0119.0120.0121.0124.5126.5128.5130.0131.0131.5133.5135.0137.0　　　　

139.5140.5141.5142.0144.0145.0146.5148.0151.0152.0152.5155.5157.5159.0161.5163.0165.0166.0169.0170.0172.5175.0177.5179.5182.5184.0186.5　　　　

188.0191.5193.5195.0196.5200.5202.5204.0205.0206.5207.5210.5213.5214.5215.5216.5219.5223.5224.5227.5230.5232.0237.5238.5240.5242.5243.0　　　　

301.5302.0303.5306.0308.5309.0311.5315.0320.5322.0324.0327.5328.0330.5331.0332.0334.0341.0348.0352.0353.0354.0360.0364.5370.0373.0374.0　　　　

505.5507.5513.0522.0522.5525.5532.0537.0539.5545.0548.0551.0555.5560.0561.0561.5566.5567.0575.5581.0586.5589.0592.5596.0598.5603.0607.0　　　　

1101.01112.51127.51148.01154.01155.01176.01186.01203.51213.01218.51243.01264.01275.01284.01314.51322.51346.01361.01411.01431.01446.51463.01494.01510.01549.01564.0　　　　

700.0703.5708.0715.0715.5727.5737.5744.0750.5758.0763.0769.0772.0778.5793.0808.0823.5839.0858.5866.0877.5885.5　　　　

908.0918.0922.5945.0960.0971.0984.0990.0

1006.01010.51026.01030.01033.51037.51052.51062.01070.51076.01078.01082.01084.51093.0　　　　

610.0617.5622.5633.5642.0645.5656.0658.0664.0668.5672.5677.0683.0692.0

375.0379.0384.0387.0390.5393.0396.0400.0404.5408.0412.5414.0415.0416.0418.0422.0424.0425.5426.5427.5428.0429.0432.0434.0440.0446.0450.0　　　　

455.0456.5459.5462.0466.5470.0473.0477.0485.0495.5498.0　　　　

246.0248.0248.5249.0251.5253.0254.0256.5258.5263.0265.5269.5272.5274.5277.0279.5280.0284.0285.5287.0287.5289.0290.0292.5294.0299.0　　　　

20to　60 20to　80 20to　80 20to　80 20to　80

12 13

F50

Conveyor and Medium-Load Power Transmission Belt

SeriesFeature: This belt, which uses polyester seamless woven fabric as a tension member, is applied to conveyance and power transmission.Use: OA equipment, ticket-vending machines, ATM, etc.Cross Section

[Fig.11] Structure of F100-SB□Type [Fig.12] Structure of F100-LBB□TypeImpregnated

surface

Polishedsurface

Polishedsurface

Glossy surface

Polyesterseamless

woven fabric

Polyesterseamless

woven fabric


Structure



Rubber material

Surface figure


Weight






Top surface

Pulley surface


Millableurethane

Millableurethane

Chloroprenerubber


Impregnatedsurface

Polishedsurface

Polishedsurface

Glossy surface

Impregnatedsurface

Polishedsurface

Polishedsurface

Glossy surface

Impregnatedsurface

Polishedsurface

Polishedsurface

Glossy surface


Width Tolerance Thickness Tolerance5 or more andless than 11



101 or more


1.0 or more

(3) F100-SB□ (Thickness: 0.8 mm) Type: List of Inner Peripheral Lengths (mm)

(4) F100-LB□ (Thickness: 1.0 mm) Type: List of Inner Peripheral Lengths (mm)


Tolerance: ± 2 mm


Tolerance: ± 3 mm


Tolerance: ± 4 mm





1100 or more

Tolerance: ± 0.5 %


Tolerance: ± 2 mm


Tolerance: ± 3 mm


Tolerance: ± 4 mm





1100 or more

Tolerance: ± 0.5 %


14 15

1

2

3

4

5

6

7

8

9

10

11

12

13

0.3

0.5

1.0

1.5

0.06

0.10

96.599.0

100.0102.0102.5104.5106.0107.5108.5110.0111.5112.5113.0114.0115.0117.0118.0119.5122.5124.5126.0127.5128.5129.0130.5132.5134.5　　　　

137.5138.0139.5141.5142.0143.5145.5149.0150.0150.5153.5154.0157.0158.5160.5162.5163.5166.5167.5170.5172.0175.5177.0180.0181.0184.0189.0　　　　

190.5192.5194.0198.0200.0201.5205.0206.0208.0211.5213.0213.5217.0221.0222.0225.0228.0229.5234.5236.0238.0240.0240.5244.0245.5246.0246.5　　　　

301.0303.5305.5307.0309.0313.0318.0319.0321.5325.5326.0328.0329.0332.0339.0345.5349.5350.0351.5358.0361.5368.0372.0372.5374.0377.0381.5　　　　

502.5504.5510.5518.5522.5529.0533.0537.5543.0545.5548.5552.5558.0560.0563.5573.5578.5584.0587.0590.0593.5596.0600.5604.5607.5615.0620.0　　　　

1108.01123.51144.01150.01150.51171.51181.51199.51208.51214.51239.51261.01271.01280.51310.51318.51343.01358.51407.01427.51442.51459.01489.51505.51545.01560.0　　　　

701.0706.0712.5713.0725.0735.0742.0748.0755.5760.5765.5770.5776.0790.5805.5821.0836.0856.0863.0874.5883.5　　　　

905.0914.5920.0942.5958.0967.5980.5987.5

1004.01008.01022.51029.01031.01033.51048.51058.01068.01074.01075.01079.01081.51088.51097.0　　　　

631.5639.5643.0654.0655.0660.5666.0670.0674.5681.0690.0698.0　　

385.0388.0389.5393.5397.5402.0405.5410.0411.0412.5413.5414.0415.5419.0422.0424.5425.0426.0427.0430.0431.5438.0443.0447.5451.0454.5457.0　　　　

460.0463.5467.5470.5475.0482.5493.0495.0　　　　

247.0249.0250.0251.5254.5256.0259.5260.0263.5266.5270.0272.0274.0276.5278.0281.0283.0284.5285.0286.0288.0290.0292.0297.0299.0299.5　　　　

98.5102.0102.5105.0105.5107.5108.0110.0111.5112.5114.0114.5115.0116.5118.0119.0120.0121.0124.5126.5128.5130.0131.0131.5133.5135.0137.0　　　　

139.5140.5141.5142.0144.0145.0146.5148.0151.0152.0152.5155.5157.5159.0161.5163.0165.0166.0169.0170.0172.5175.0177.5179.5182.5184.0186.5　　　　

188.0191.5193.5195.0196.5200.5202.5204.0205.0206.5207.5210.5213.5214.5215.5216.5219.5223.5224.5227.5230.5232.0237.5238.5240.5242.5243.0　　　　

301.5302.0303.5306.0308.5309.0311.5315.0320.5322.0324.0327.5328.0330.5331.0332.0334.0341.0348.0352.0353.0354.0360.0364.5370.0373.0374.0　　　　

505.5507.5513.0522.0522.5525.5532.0537.0539.5545.0548.0551.0555.5560.0561.0561.5566.5567.0575.5581.0586.5589.0592.5596.0598.5603.0607.0　　　　

1101.01112.51127.51148.01154.01155.01176.01186.01203.51213.01218.51243.01264.01275.01284.01314.51322.51346.01361.01411.01431.01446.51463.01494.01510.01549.01564.0　　　　

700.0703.5708.0715.0715.5727.5737.5744.0750.5758.0763.0769.0772.0778.5793.0808.0823.5839.0858.5866.0877.5885.5　　　　

908.0918.0922.5945.0960.0971.0984.0990.0

1006.01010.51026.01030.01033.51037.51052.51062.01070.51076.01078.01082.01084.51093.0　　　　

610.0617.5622.5633.5642.0645.5656.0658.0664.0668.5672.5677.0683.0692.0

375.0379.0384.0387.0390.5393.0396.0400.0404.5408.0412.5414.0415.0416.0418.0422.0424.0425.5426.5427.5428.0429.0432.0434.0440.0446.0450.0　　　　

455.0456.5459.5462.0466.5470.0473.0477.0485.0495.5498.0　　　　

246.0248.0248.5249.0251.5253.0254.0256.5258.5263.0265.5269.5272.5274.5277.0279.5280.0284.0285.5287.0287.5289.0290.0292.5294.0299.0　　　　

F1000-LBF100-SBF100-LBCF100-SBC2F100-LBUF100-SBU

7.847.84 7.84 7.84 7.84 7.84

2.02.0 2.0 2.0 2.0 2.0

39.239.2 39.2 39.2 39.2 39.2

108 8 10 8 10

1.00.8 0.8 1.0 0.8 1.0

5to2005to200 5to200 5to200 5to200 5to200

0.5to1.00.4to0.8 0.4to0.8 0.5to1.0 0.4to0.8 0.5to1.0

0.4to0.80.3to0.6 0.3to0.6 0.4to0.8 0.3to0.6 0.4to0.8

2010 1510 15 15

20to　60 20to　60 20to　80 20to　80 20to　80 20to　80

F100

Glossysurface

Medium-Load Power Transmission Belt

SeriesFeature: This belt, which uses a cord as a tension member, is applied to medium-load power transmission.Use: Low-torque, high-speed power transmission, draw texturing machines, feeder belts, etc.Cross Section

[Fig.13] Structure of XA and A-P□ Type

[Fig.15] Structure of A-NR/WN Type

[Fig.14] Structure of A-OBA TypeGlossysurface

Impregnated surface

Polyamide woven fabric

Polyester cord

(Conductive thread)

Polyester cord

Polished surface

Polyamidewoven fabric

Polyamidewoven fabric

Polyestercord

Polishedsurface

Polishedsurface


Structure



Rubber material

Surface figure


Weight





Top surface (Against cardboard) (Against cardboard)

Pulley surface

Fig. 14Fig. 13 Fig. 13 Fig. 15 Fig. 15Fig. 13


Nitrile rubber Nitrile rubber Nitrile rubber Chloroprenerubber

Blue naturalrubber

White naturalrubber

Glossy surface Glossy surface Glossy surface

Glossy surface Glossy surfacePolishedsurface

Polishedsurface

Polishedsurface

Polishedsurface

Polishedsurface

Impregnatedsurface

Polishedsurface

1 The maximum width of the above types (except for A-NR and A-WN) is 1/5 of the inner peripheral length.2 For A-NR and A-WN, specify thickness. (We provide you a belt with a length on a 1 mm basis)3 Minimum pulley diameter of A-NR and A-WN is 10 times number of the thickness.

1


Width Tolerance Thickness Tolerance ToleranceBelt type5 or more andless than 11



101 or more

1.0 or more

2

3 3

(3) XA/A Type: List of Inner Peripheral Lengths (mm)Inner peripheral length of less than 300

Tolerance: ± 2 mm


Tolerance: ± 3 mm


Tolerance: ± 4 mm


Tolerance: ± 5 mm

1000 or more

Tolerance: ± 0.5 %

If you wish to order a product with a size other than the standard, consult us.SEB is built to order; the minimum order quantity is one lot. When ordering the belt with length other than the above, consult us. For details, contact our agencies or our sales representative.We can provide you A-NR/A-WN with a length from 400 – 1970 mm.

1

2

3

4

5

6

7

8

9

10

11

12

13

0.3

0.5

1.0

1.5

1.0 0.50A-WNA-NR

16 17

XA A

0.2to0.40.2to0.4 0.1to0.3 0.2to0.4

0.4to0.80.4to0.8 0.4to0.8 0.4to0.8

14.77.35 14.7 14.7 7.35 7.35

1.01.0 1.0 1.0 0.5 0.5

58.829.4 58.8 58.8 58.8 58.8

1412 14 14 102 102

1.21.1 1.2 1.2

1.5 2.0

3.0to8.0 3.0to8.0

5to4005to400 5to400 5to400 7to400 7to400

A-WNA-NRA-PCA-OBAA-PBXA-PB

15

20to　80 20to　80 20to　80 20to　80 20to　60 20to　60

15 15 15 80 80

181.0184.0189.0191.0192.0194.0198.0200.0202.0204.0205.0208.0210.0212.0214.0216.0220.0221.0224.0227.0230.0235.0236.0238.0239.0240.0243.0245.0247.0248.0

1000.01008.01016.01021.01023.01026.01041.01050.01060.01066.01067.01071.01073.01080.01093.01100.01115.01135.01142.01145.01165.01175.01190.01200.01207.01230.01234.01250.01261.01270.0

1285.01300.01308.01338.01350.01396.01415.01430.01450.01478.01500.01535.01550.01590.01600.01620.01645.01653.01660.01700.01708.01800.01835.01850.01890.01965.01970.02070.02100.02118.0

2150.02160.02181.02185.02190.02200.02230.02248.02270.02300.02360.02500.02570.02750.02808.02819.02890.03336.04525.0

300.0302.0305.0306.0307.0312.0316.0317.0320.0324.0326.0327.0328.0331.0338.0344.0347.0348.0350.0356.0360.0366.0369.0370.0374.0380.0382.0386.0388.0392.0

396.0400.0404.0407.0409.0410.0411.0414.0417.0420.0421.0422.0423.0426.0427.0430.0435.0441.0445.0450.0452.0456.0457.0461.0465.0498.0472.0480.0489.0493.0

250.0251.0254.0255.0260.0263.0266.0269.0272.0274.0276.0278.0281.0282.0283.0284.0285.0287.0289.0291.0295.0296.0298.0

500.0501.0508.0516.0520.0525.0529.0534.0539.0542.0545.0550.0553.0555.0560.0570.0575.0580.0583.0586.0589.0592.0597.0

800.0815.0830.0850.0857.0870.0876.0900.0904.0908.0913.0935.0950.0960.0973.0980.0995.0

128.0128.5129.0131.0133.0135.0137.0138.0140.0141.0143.0144.0145.0149.0149.5150.0153.0154.0157.0159.0160.0162.0164.0166.0167.0170.0172.0175.0177.0180.0

600.0605.0610.0617.0626.0635.0638.0648.0650.0656.0660.0665.0670.0676.0685.0692.0695.0700.0707.0708.0720.0729.0736.0743.0750.0755.0760.0764.0770.0785.0

High-Load Power Transmission Belt

SeriesFeature: This belt, which uses a cord as a tension member, is mainly applied to high-load power transmission.Use: Grinding machines, internal grinders, industrial vacuum cleaners, etc.Cross Section

[Fig.16] Structure of B/D-PB Type [Fig.17] Structure of GS-OC TypeGlossysurface

Glossysurface

Polyamidewoven fabric Polyamide

woven fabric

Polyestercord

Polishedsurface

Impregnated surface

Impregnated surface


Structure



Rubber material

Surface figure


Weight





Top surface

Pulley surface


The maximum width is 1/5 of the inner peripheral length.

Fig. 16 Fig. 16 Fig. 17

5 to 400 5 to 400 5 to 400

Nitrile rubber ChloroprenerubberNitrile rubber

Glossy surface Glossy surface

Polishedsurface

Polishedsurface

Impregnatedsurface

Impregnatedsurface

Standard Dimensional Tolerance(1) Width (mm) (2) Thickness of B/D Type (mm)

Width Tolerance Thickness Tolerance ToleranceBelt type5 or more andless than 11



101 or more

1.0 or more

0.8 or more and less than 1.0

(3) B/D Type: List of Inner Peripheral Lengths (mm)Inner peripheral length of less than 300

Tolerance: ± 2 mm


Tolerance: ± 3 mm


Tolerance: ± 4 mm


Tolerance: ± 5 mm

1000 or more

Tolerance: ± 0.5 %

(4) GS Type: List of Inner Peripheral Lengths (mm)Inner peripheral length of less than 300

Tolerance: ± 2 mm


Tolerance: ± 3 mm


Tolerance: ± 4 mm


Tolerance: ± 5 mm

1000 or more

Tolerance: ± 0.5 %


B D GS

1

2

3

4

5

6

7

8

9

10

11

12

13

0.3

0.5

1.0

1.5

0.06

0.10

0.10

0.15

GS-OC

GL-OC

1.4 1.7 0.75

1.0 1.0 0.3

29.4 58.8 14.7

118 235 167

16 20 10

0.4to0.8 0.4to0.8 0.1to0.3

0.2to0.4 0.2to0.4 0.1to0.3

B-PB D-PB GS-OC

25

20to　80

18 19

35 20

20to　8020to　80

274.0276.0278.0280.0283.0285.0286.0287.0288.0290.0292.0294.0299.0

186.0191.0192.0194.0196.0200.0202.0203.0206.0207.0210.0213.0214.0216.0219.0223.0224.0227.0230.0

232.0237.0238.0240.0242.0243.0246.0247.0247.5249.0251.0252.0253.0256.0258.0262.0265.0269.0272.0

147.0150.0151.0152.0155.0156.0159.0160.0162.0164.0165.0168.0169.0172.0174.0177.0179.0182.0183.0

603.0607.0610.0617.0622.0634.0642.0645.0656.0657.0663.0668.0672.0677.0684.0692.0700.0704.0708.0

714.0715.0727.0737.0743.0750.0758.0763.0768.0772.0778.0793.0

808.0823.0839.0858.0865.0877.0885.0908.0917.0922.0945.0960.0970.0983.0990.0

363.0370.0373.0375.0378.0383.0387.0390.0392.0396.0400.0404.0408.0412.0413.0415.0417.0421.0424.0425.0427.0

521.0525.0531.0535.0539.0540.0545.0548.0551.0555.0559.0561.0566.0575.0581.0586.0589.0592.0596.0598.0

428.0429.0432.0434.0440.0445.0450.0453.0456.0459.0462.0466.0470.0473.0477.0484.0495.0497.0505.0507.0512.0

301.0302.0303.0306.0307.0309.0311.0315.0320.0321.0323.0328.0330.0331.0332.0341.0347.0351.0352.0353.0360.0

1185.01202.01212.01217.01242.01263.01274.01283.01313.01321.01346.01361.01410.01430.01445.01462.01493.01509.01548.01563.0

1006.01011.01025.01031.01033.01036.01051.01061.01070.01074.01077.01081.01084.01091.01100.01111.01126.01147.01153.01156.01174.0

181.0184.0189.0191.0192.0194.0198.0200.0202.0204.0205.0208.0210.0212.0214.0216.0220.0221.0224.0227.0230.0235.0236.0238.0239.0240.0243.0245.0247.0248.0

1000.01008.01016.01021.01023.01026.01041.01050.01060.01066.01067.01071.01073.01080.01093.01100.01115.01135.01142.01145.01165.01175.01190.01200.01207.01230.01234.01250.01261.01270.0

1285.01300.01308.01338.01350.01396.01415.01430.01450.01478.01500.01535.01550.01590.01600.01620.01645.01653.01660.01700.01708.01800.01835.01850.01890.01965.01970.02070.02100.02118.0

2150.02160.02181.02185.02190.02200.02230.02248.02270.02300.02360.02500.02570.02750.02808.02819.02890.03336.04525.0

300.0302.0305.0306.0307.0312.0316.0317.0320.0324.0326.0327.0328.0331.0338.0344.0347.0348.0350.0356.0360.0366.0369.0370.0374.0380.0382.0386.0388.0392.0

396.0400.0404.0407.0409.0410.0411.0414.0417.0420.0421.0422.0423.0426.0427.0430.0435.0441.0445.0450.0452.0456.0457.0461.0465.0468.0472.0480.0489.0493.0

250.0251.0254.0255.0260.0263.0266.0269.0272.0274.0276.0278.0281.0282.0283.0284.0285.0287.0289.0291.0295.0296.0298.0

500.0501.0508.0516.0520.0525.0529.0534.0539.0542.0545.0550.0553.0555.0560.0570.0575.0580.0583.0586.0589.0592.0597.0

800.0815.0830.0850.0857.0870.0876.0900.0904.0908.0913.0935.0950.0960.0973.0980.0995.0

600.0605.0610.0617.0626.0635.0638.0648.0650.0656.0660.0665.0670.0676.0685.0692.0695.0700.0707.0708.0720.0729.0736.0743.0750.0755.0760.0764.0770.0785.0

128.0128.5129.0131.0133.0135.0137.0138.0140.0141.0143.0144.0145.0149.0149.5150.0153.0154.0157.0159.0160.0162.0164.0166.0167.0170.0172.0175.0177.0180.0

High-Temperature Conveyor and Low-Load Power Transmission Belt

Feature: This belt, which uses highly heat-resistant rubber and seamless woven fabric, is applied to heat-resistantconveyance and low-load power transmission.Use: Conveying silver-halide sensitized paper, high-temperature pinching conveyance, etc.Cross Section

Series

[Fig.18] Structure of H50-LIF Type [Fig.19] Structure of H50-SIF TypePolished

surface

Glossysurface

Heat-resistantseamless

woven fabric

Heat-resistantseamless

woven fabric

Polishedsurface

Woven fabricsurface


Item

Structure



Rubber material

Surface figure


Weight



Fig. 18 Fig. 19

Frictioncoefficient



Axial load at the standard elongationrate under stable conditions (N/mm width)

Top surface

Pulley surface


Width Tolerance5 or more andless than 11



101 or more

Thickness Tolerance

1.0 or more

0.8 or more and less than 1.0

(3) H50 Type: List of Inner Peripheral Lengths (mm)350 or more and less than 500

Tolerance: ± 3 mm


Tolerance: ± 4 mm





1100 or more

Tolerance: ± 0.5 %

Each inner peripheral length of H50-SIF Type shown in the list above is obtained when the impregnated surface is placed on the pulley side.For the inner peripheral length obtained when the impregnated surface is placed in the opposite way, contact us.If you wish to order a product with a size other than the standard, consult us.SEB is built to order; the minimum order quantity is one lot. For details, contact our agencies or our sales representative.

Whitefluorine-containing rubberPolished surface

Glossy surface Woven fabric surface

Polished surface

1

2

3

4

5

6

7

8

9

10

11

12

13

0.06

0.10

0.3

0.5

1.0

1.5

H50

5to200 5to200

0.4to0.8 0.4to0.8

0.5to1.0 0.3to0.6

4.9 4.9

2.0 2.0

24.5 16.7

19 11

1.0 0.7

H50-LIF H50-SIF

15

20to　200

20 21

352.0353.0360.0364.5370.0374.0375.0379.0384.0387.0390.5393.0396.0400.0404.5408.0412.5414.0415.0416.0418.0422.0424.0426.5427.5432.0434.0

505.5507.5513.0522.0525.5532.0537.0539.5545.0548.0551.0555.5560.0567.0575.5581.0586.5589.0592.5596.0598.5603.0607.0610.0617.5622.5633.5

1101.01112.51127.51148.01155.01176.01186.01203.51213.01218.51243.01264.01275.01284.01314.51322.51346.01361.01411.01431.01446.51463.01494.01510.01549.01564.0

700.0703.5708.0715.0715.5727.5737.5744.0750.5758.0763.0769.0772.0778.5793.0808.0823.5839.0858.5877.5885.5

908.0918.0922.5945.0960.0971.0983.0990.0

1006.01010.51026.01037.51052.51062.01076.01082.01084.51093.0

440.0446.0450.0455.0459.5466.5470.0473.0477.0485.0495.5498.0

642.0645.5656.0658.0664.0668.5672.5677.0683.0692.0

15

20to　200

Whitefluorine-containing rubber

Selecting Conditions

Selecting Procedures

1. Types of motors2. Operating condition (Load fluctuation)3. Load inertia4. Accelerating torque5. Number of revolutions (Speed)6. Conveyance condition and method7. Pulley diameter8. Speed ratio9. Center distance

1. Atmosphere (Oil, water, dust and ozone)2. Ambient temperature (during operation and stop)3. Ray (Ultraviolet rays)

1. Standard elongation rate2. Tension under stable conditions3. Rubber material4. Tension member structure5. Surface friction coefficient6. Pitch line position7. Minimum pulley diameter8. Antistatic performance9. Mass

1. Tension adjustment (Adjusting/fixing axis)2. Pulley shape (Width and crown height)3. Selecting belt top/bottom surfaces

Selecting Belt

Use C

onditions

Belt Perform

ance

Use

Environment

InstallationC

onditions

Fully understand the purpose and conditions of the belt use for selecting the belt type. Then select thebelt width according to transmission/conveyance capacity and calculate the required elongation rate.

When selecting a belt, it is necessary to pay attention to not only the performance and characteristics of thebelt but also the use conditions and environment of the machine. Therefore, refer to the following items.

Selecting Type

Selecting Structure

When selecting the belt type, examine the use, use environment and the difficulty level of maintenance/inspection for the machine using the belt. After fully understanding the features of each belt type, select the most suitable one.

Machine to be used

Purpose of use

Environmental conditions

Use conditions

Desired items

Type

Office machine Automatic equipment Power-saving equipment Wood working machine

Machine tool Packaging machinery Textile machine Printing/paper-making machine

Food machinery

Power transmission

Conveyance

Others

Oil Water Paper dust Dust Corrosion

Temperature Humidity Ozone Gas Chemicals

Inertia Conveyance condition Conveyance method Pulley diameter Speed ratio

Measurement instrument Medical equipment

Type of motor Number of revolutions(Speed) Operating condition(Load fluctuation)

Cord Woven fabric Knit fabric

Surface condition Color

Center distance Others (Space limit, etc.)

Others

Display equipment

Tension memberstructure

Seamless knit fabric(Polyester, etc.)

N-SMV1/V2,N-LBU, etc. G15, G30, etc. F50, F100, etc. XA, A, B, D, etc.

Conveyance

High

Low

Low

High

Low-load power transmissionand conveyance

Medium-load power transmissionand conveyance Power transmission

Cord (Polyester, etc.)

Major types

Seamless woven fabric (Polyester, etc.)

Major application

Strength

Stretch properties

Code

Pinching a hard card between belts for conveyance

Pinching a paper sheet between belts for conveyance

High-precision power transmission

Used for high-precision power transmission requiring antistatic performance

Used when both surfaces of the belt are required to be driven

Used when high friction coefficient is required on the back surface

Determine the belt type and structure by examining the applications and the rubber properties mentioned in P 2 and 3.

Used for the extremely low-stretch belt that uses glass fiber cord as a tension member

Main Features and Application

Code starting with the letter “S” (SB, SBC, SBU, etc.)

Code starting with the letter “L” (LB, LBC, LBU, etc.)

Code starting with the letter “P”(PB, PC, etc.)

Code ending with the letter “A” (OBA, etc.)

11

12

13

14

22 23

PSS

OC

NR, WN

Design Materials

Transmitted Power Correction Factor Depending on Overload Fluctuation

Motor overload fluctuation

Environmental conditions

Environmentalconditions

Normal

AC wound motors, DC motors, etc.

Slightly poor

Poor(Attachment of large quantities of oil, etc.)

149 % or less

Smooth

Nearly smooth

High impactt

Low impact

Medium impact

Oper

ating

cond

itions

199 % or less 249 % or less 250 % or less

Types of Motors Operating Conditions for Machines to Be Used

1. Maximum output: Rated output of 149 % or less

AC wound motors, normal torque motors, etc.

2. Maximum output: Rated output of 150 – 199 %

AC wound motors, DC compound-wound motors, normal torque synchronous motors, etc.

3. Maximum output: Rated output of 200 - 249 %

DC series-wound motors, high torque synchronous motors,AC single-phase motors, line shaft motors, etc.

4. Maximum output: Rated output of 250 % or more

Liquid agitators, blowers, small machine tools, low-load conveyors, etc.

1. Extremely smooth power transmission

Machine tools, line shaft motors, pumps, washing machines, viscous material mixers, etc.

2. Nearly smooth power transmission

Compressors, generators, wood working machines, elevators, rubber calenders, etc.

3. Power transmission with low impact

Centrifugal machines, bucket elevators, pulverizers, saw mills, wood working machine, etc.

4. Power transmission with medium impact

Crusher mills, piston compressors, pumps, extruders, etc.5. Power transmission with high impact

Belt Type Selection Diagram

Traction coefficient ( )

Angle of contact with pulley ( °)






Belt

widt

h (m

m)

Design tension P (N)

24 25

A

A

B

C

C

1.6 1.9 2.4 1.8 2.1 2.7 2.0 2.4 3.0 2.2 2.6 3.3

1.5 1.8 2.2 1.7 2.0 2.5 1.9 2.2 2.8 2.1 2.5 3.1

1.4 1.7 2.1 1.6 1.9 2.4 1.8 2.1 2.7 2.0 2.4 3.0

1.3 1.5 1.9 1.5 1.8 2.2 1.7 2.0 2.5 1.9 2.2 2.8

1.2

70 80 90 100 110 120 130

210 220 230 240 250 260 270

140 150 160 170 180 190 200

0.4532 0.4805 0.5069 0.5323 0.5569 0.5805 0.6032

0.6249 0.6457 0.6656 0.6846 0.7027 0.7200 0.7364

0.2396 0.2722 0.3042 0.3355 0.3662 0.3960 0.4250

1.4 1.8 1.4 1.7 2.1 1.6 1.9 2.4 1.8 2.1 2.7

A B CB A CB A CB

DAXA BG15 G30 F50H50

F100

300

200

100

80

605040

20

10

8

54

3

2

1 1 3 5 6 8 2K 3K 4K 5K 6K 10K8K1K10 20 30 40 50 60 80 300200100 400 600 80042

6

30

N

Design Procedure 1 Calculating the effective tension applied to the beltCalculating the effective tension from the transmitted power(1) Calculate the belt speed (V).

Calculate the belt size (Inner peripheral length) BL by using the elongation rate ( 0).

Select a belt with the nearest size according to the obtained BL and the inner peripheral length.

Design Procedure 5

Design conditions (1) Type of Machine:Cross flow fan(2) Motor rated output:2.2 kw(3) Number of revolutions of the original driving axle(4) Speed ratio:1 to 2 deceleration(5) Center distance(6) Drive pulley diameter(7) Belt width limit:30 mm or less(8) Sudden start/stop:None(9) Use conditions:Poor conditions not observed in indoor use

Selecting the inner peripheral length of the beltCalculate the belt length (Lp) for installation.Obtain the inner peripheral length for installation by using the following formula or the Belt Inner Peripheral Length Nomograph (Pages 30 and 31).

Design Procedure 2 Calculating the design tensionObtain the transmitted power correction factor (K1) from the table at Page 24.Then calculate the design tension (P).

Design Procedure 3 Selecting the belt typeSelect the belt type from the Belt Type Selection Diagram (P. 25)

Design Procedure 1 Calculating the effective tension applied to the belt(1) Calculate the belt speed.

Design Procedure 2 Obtaining the design tension Obtain the transmitted power correction factor (K1) from the table (Page 24).

Design Procedure 4 Calculating the traction coefficient ( )Select the appropriate pulley diameter according to the speed ratio, the pulley limit diameter, etc.

Design Procedure 5 Selecting the inner peripheral length of the beltObtain the belt length (Lp) for use by using the Belt Inner Peripheral Length Nomograph (P. 30 and 31) or the following formula.

Select the nearest size belt from the belt length list.Selected belt size: B-PB 1700(mm)

When using the belt B-PB, the standard elongation rate (0) is 1%;calculate the belt size (Inner peripheral length BL) as follows:

Design Procedure 3 Selecting the belt type Select the belt type “B-PB” from the Belt Type Selection Diagram (Page 25)

Belt speed V

Drive pulley diameter dDriven pulley diameter D

(2) Calculate the effective tension applied to the belt.

Effective tension Te (N)

Design Procedure 6 Selecting the belt width

Design Procedure 7 Calculating the required elongation rate of the belt

Calculate the centrifugal force per unit width (Tf) applied to the belt.

Then, calculate the belt width (W).

The belt length is set by 5 mm unit; round the belt length obtained above to the nearest 5 mm.

Design Procedure 4 Calculating the traction coefficient ( )

Calculating the torque (Tr) caused by inertia(1) Calculate the torque (Tr) caused by the moment of inertia (J).

Calculating the effective tension from the transmission torque (Tr)(1) When the unit of torque is N∙m

(2) Calculate the effective tension (Te), where the transmitted power is kW.

Calculation for Selecting Belt Design Calculation

Circumference ratioDDrive pulley diameter (mm)nNumber of revolutions of the drive pulley (r/min)

C Center distanceD Large pulley diameter (mm)d Small pulley diameter (mm)

Circumference ratioD Drive pulley diameter (mm)n Number of revolutions of the drive pulley (r/min)

Specific gravity (1.24 normally used)V Belt speed (m/s)t Belt thickness (mm)

P Design tension (N)SL Axial load under stable conditions (N/mm)Traction coefficient

J Moment of inertia (kgm2)n1-n2 Difference in number of revolutions(r/min)t Acceleration/deceleration time (S)

Pm’ Transmitted power (kW)

PmTransmitted power (kW)


D Large pulley diameter (mm)d Small pulley diameter (mm)c Center distance (mm)

Friction coefficient of the pulley surface (0.4 normally used)Contact angle on the pulley (rad)

m Mass (kg)Acceleration/deceleration speed (m/s2)

GD2 Flywheel effect (kgf∙m2)n1-n2 Difference in number of revolutions (r/min)t Acceleration/deceleration time (S)

(2’ ) Calculate the effective tension (Te), where the transmitted power is W.

(1’ ) Calculate the torque (Tr) caused by GD2.

(2) When the unit of torque is N∙mm

(2) Calculate the effective tension (Te) caused by the weight of the conveyed object, during acceleration/deceleration.

Calculate the contact angle (rad).

Calculate the contact angle (deg). Then, convert it into the contact angle (rad) as follows:

Calculate the traction coefficient ( ).Obtain the traction coefficient ( ) by the following formula or theproportional calculation (with the use of the table at P. 25).

Belt width W (mm) W = (Width set by 5 mm unit) ≥ W’

Transmitted power correction factor (K1) = 2.0

Then, calculate the design tension P.


Belt width30mm

320.24N

Belt

widt

h(m

m)

Calculate the contact angle (rad) of the belt on the pulley.

Or, first calculate the contact angle (deg) and convert it into the contact angle (rad) as follows.

Obtain the traction coefficient ( ) by the following formulaor the proportional calculation (with the use of the table at Page 25).

C Center distance (mm)D Large pulley diameter (mm)d Small pulley diameter (mm)

Calculate the contact angle (rad) of the belt on the pulley, from the pulley layout.Select the appropriate pulley diameter from the speed ratio, the pulley limit diameter, etc. and calculate the contact angle (rad) of the belt on the pulley. Standard elongation rate (%)


V= 60000DnV (m/s)

Te= V1000PmTe (N)

Te=

Te=

Te=

Lp=2C+

V=

Te=

Te=

Te=

Tf=0.002V²t (N/mm)

(mm)

2

Tr=

Tr=

Te=m

P=TeK1

VPm’

W’ =

=

2Tr’

J(n1-n2)

GD²(n1-n2)

(D+d)

100+100

4C

60000

V

Dn

1000Pm

(D-d)²

(SL-Tf)P

+

9.55t

38.2t

2000TrD

D

Te (N)

Te (N)

Te (N)

Tr (N∙m)

Lp (mm)

BL (mm) BL=Lp

Tr (N∙m)

Te (N)

P (N)

26 27

TrTorque (N∙m)DPulley outer diameter (mm)

TrTorque (N∙mm)DPulley outer diameter (mm)

Friction coefficient of the pulley surface (0.4 normally used)Pm Transmitted power(kW)

(rad)=-2SIN ֿ ¹∙ [

(deg)=180º-2SIN ֿ ¹∙

]D-d2C

[ ]D-d2C

(rad)=(deg)180

e-1e+1=

W’W (%)

V= 600001501750

300-1502500

2500

V=13.74(m/s)

(m/s)

13.74

160.12(N)

10002.2

P=TeK1

=160.122.0=320.24(N)

=-2SIN ֿ ¹ ∙ [ ]D-d2C

=-2SIN ֿ ¹ ∙ =2.84(rad)[ ]


=162.7(deg)

[ ]D-d2C

(deg)=180º-2SIN ֿ ¹∙ [ ]300-150

= =2.84(rad)(rad)=

= = =0.5139

(deg)180

162.7

e-1e+1

180

e0.42.84-1e0.42.84+1

Lp=2C+

Lp=2500+

BL=Lp

BL=1718.1 =1701.1

=1718.1 (mm)

+

2(D+d)

4C(D-d)²+

2(300+150)

4500(300-150)²

100100+

100100+1

300

300 400 600 800 1K 2K 3K 4K 5K 6K 8K 10K

200

200

100

100

80

80

60

60

30

30

20

20

10

10

8

8

6

6

5

5

4

4

3

3

2

21

1

40

40

50

50

XA A B DF50G30G15

F100

&H50

N

Design Procedure 6 Selecting the belt width

Design Procedure 7 Calculating the required elongation rate of the belt ()

The following is the result of selection of the belt.

Calculate the centrifugal force per unit width (Tf) applied to the belt.

Then, calculate the belt width (W).

The belt length is set by 5 mm unit; select the belt width of 25 mm.

P Design tension (N)SL Axial load under stable conditions (N/mm)Traction coefficient

Belt width W (mm)


Calculate the required elongation rate ().

Belt type : SE-B-PBBelt size : 25wmm1700Lmm1.4TmmDrive pulley : 150mmDriven pulley : 300mmRequired belt : 0.9% elongation rate

Formulas and Conversion Table

Belt speed D Drive pulley diameter (mm)n Number of revolutions of the drive pulley (r/min)

Pm : Transmitted power (kW or W)V : Belt speed

Tr : Torque (N∙m or N∙mm)D : Pulley diameter (mm)

m :Mass (kg) :Acceleration/deceleration speed

n : Number of revolutions

J : Moment of inertian1-n2 : Difference in number of revolutionst : Acceleration/deceleration timeGD² : Flywheel effect

Te : Effective tensionV : Belt speed

Tr : Torque

D Large pulley outer diameter (mm)d : Small pulley outer diameter (mm)

VN : Power frequencyPo : Number of motor poles

D Large pulley outer diameter (mm)d : Small pulley outer diameter (mm)C : Center distance (mm)

Item Formula RemarksSymbol Unit

Item Formula RemarksSymbol Unit

Number of revolutions

Belt installation length(Open belt)

Center distance

Small pulley contact angle

Traction coefficient

Effective tension

Torque

Transmitted power

Number of revolutionsof the motor

: Friction coefficient: (rad)

28 29

Tf=0.002V²tTf=0.0021.2413.74²1.4 =0.655(N/mm)

W’ =

: W=25mm 21.7mm

MEMO

=21.7(mm)

=

P(SL-Tf)

Specific gravity (1.24 normally used)VBelt speed (m/s)t Belt thickness (mm)

320.24(29.4-0.655)0.5139

=0.87(%)21.725=1W’

W= V=V

n

LP

C

n

Te

Tr

Pm

N

N ∙m

W or kW

m/s

r/min

mm

mm

(deg)

(rad)

r/min

60000Dn

n= D60000V

b+ b²-8(D-d)²

n= Po120VN

Lp 2C+

C

+2

8

(D+d)4C

(D-d)²


(deg) 180- [[ ]

]D-d

57.3(D-d)2C

C

= e-1e+1

(rad)=(deg) 180

b=2Lp-(D+d)

Te= 1000Pm(kW)V

Te= Pm(W)V

Te= 2000Tr(N∙m)D

Te=

Te=m

2Tr(N∙m)D

Tr=

Tr=

J(n1-n2)

GD²(n1-n2)9.55t

38.2t

Tr= 9550Pm(kW)n

Tr= 9.55Pm(W)n

Pm(kW)= TeV1000

Pm(kW)= Trn9550

Pm(W)= Trn9.55

Pm(W)=TeV

Calculating Belt Inner Peripheral Length

In the last step of designing the belt, obtain the inner peripheral length of the belt by using the Belt Inner Peripheral Length Nomograph (Page 31).

C Center distance (mm)D Large pulley diameter (mm)d Small pulley diameter (mm) Circumference ratio

Calculating the inner peripheral length of the belt

<Calculation>

Belt typeStandard elongation rateCenter distanceSmall pulley diameterLarge pulley diameter

XA-PA1%150mm 30mm 50mm

First, add “Small pulley diameter” to “Large pulley diameter” as follows:

Select the nearest inner peripheral length (420 mm) from the List of Inner Peripheral Lengths.

When using this Belt Inner Peripheral Length Nomograph, it is hard to read fractional values and if the speed ratio is high (1: 5 or more), a margin of error becomes large. In such a case, calculate the belt inner peripheral length by the following formula.When calculating the belt length for multi axial power transmission, inform us of the pulley diameter and the coordinate; we will calculate the belt length.

Read the value of the inner peripheral length that is on the line connecting the center distance (150 mm) and “d + D” (80 mm).

The above value is the approximate installation inner peripheral length. Therefore obtain the required inner peripheral length by dividing the above value by elongation of the belt.

Installation inner peripheral length Lp (mm) Lp = Approx. 425 mm

Inner peripheral length of the belt BL (mm)

Installation inner peripheral length Lp (mm)

BL = Installation inner peripheral length = 425 1.01= 420.8mm

100Elongation rate (%)

Belt Inner Peripheral Length Nomograph

Pulley(d+D)(mm)

Belt installation inner peripheral length

(mm)

Centerdistance

(mm)

30 31

d+D=30+50=80

Lp=2C+ 2(D+d)

4C(D-d)²+

d

CD

800

700

600

500

400

300

200

100

150

1700

1600

1500

1400

1200

1300

1100

1000

900

380

400

420

440

460

480

500

240

260

280

300

360

320

340

60

80

100

120

140

160

180

200

220

20

40

1000

500

2500

2000

1500

4500

4000

3500

3000

800

900

1000

1100

1200

5000

700

600

600

500

500

400

400

300

200

100

425

200

300

100

700

800

20

40

60

80

100

120

140

160

180

200

80

2000

1900

1800

øø

Flat Pulley

Recommended Pulley Shape

Unlike a V-belt, a flat belt, which runs on a pulley surface, has nothing to control its movement in the width direction. Therefore, it is necessary to process the pulley to a shape of “crown” , where the center diameter is larger than the diameters on both sides.Due to the crown processing, difference in speed occurs on the surface of the revolving pulley. When the pulley center diameter is larger, the belt stably runs on the pulley center where the belt speed is high. When the belt and the pulley skid for any cause, speed difference does not occur and the crown effect is not achieved. As a result, the belt deflects from the pulley.Normal ly, the pul ley is processed to make an arch (crown). (When the pul ley is wider, i t may be processed to make a trapezoidal shape.)As a curvature radius becomes larger, the belt tends to run stably. On the other hand, as the curvature radius becomes smaller, the stress distribution of the belt becomes abnormal, causing shortening of the belt life or decrease in transmitted power.Select an appropriate crown of pulley depending on the type, width and use of the belt.

The crown height for power transmission and large-width conveyance and the recommended curvature radius mentioned above, which are obtained from performances and experiments, are not the specified values but the reference values.If the pulley width is larger (50 mm or more) in case of pinching conveyance, the curvature radius may become too small to fit the belt. (In such a case, consult us.)Use an abrasion-resistant bel t wi th the running surface f in ish of 1.5 to 6S. When using an aluminum pulley, treat its surface with hard alumite, etc. to prevent abrasion.Normally, the crown becomes more effective as it becomes higher. However, if the crown becomes excessively high, the belt may not fit the crown, resulting in lack of transmission capacity and worse running conditions.

1. Pulley WidthMake the pulley width larger than the belt width.Obtain the pulley width by the following formula.

2. Crown ShapeSelect an appropriate crown shape depending on the use and the pulley width.

Pulley widthBelt width

For power transmission

For pinching conveyance

For large-width conveyance

Pulley widthCrown heightPulley diameterCurvature radiusBelt width

Calculating the curvature radius

Recommended curvature radius

Standard Crown Height for Power Transmission and Large-Width Conveyance

Pulley diameter (D) ø 100 or more

Crownheight(hc)

Standard

Upper limit

Remarks

Do not attach flanges to the pulley.CAUTIONWhen the flanges are attached to the pulley, the belt gets caught up on them in most cases, resulting in fatal damage to the belt.

32 33

bp 1.15b+2 (mm)

bp

bp

bp

b/3

(mm)

No edge

hc

hc

hc

rc

rc

D

D

D

bp :

bp :hc :D :

b :rc :

b :

1 2

8hcrc= bp²

0.10 0.12 0.13 0.14 0.17 0.20 0.24

0.400.320.280.220.200.180.16

D0.003

D0.005

ø80ø60ø50ø30ø20ø10ø5

: 50~100mm

hc=rc- rc²- bp2( ) ²

For Correct UsePrecautions for use

The flat belt is a friction transmission belt. For power transmission, the belt requires an appropriate ini t ial tension ( instal lat ion tension). Excessively low instal lat ion tension on the belt may cause skidding and deflection; excessively low tension may cause shortening of the belt life and damage to the bearing. Select an appropriate belt depending on the load and use and apply an appropriate tension to the belt.

Sonic tensiometerPreviously, we have applied installation tensions to the bel ts f rom our exper ience. As a resul t , the tens ion values varied widely. As a result, such an inappropriate i ns ta l l a t i on t ens ion was one o f t he causes o f t he mechanical troubles.The sonic tensiometer shows the accurate tension value b y c a l c u l a t i n g t h e n a t u r a l v i b r a t i o n f r e q u e n c y proportional to the tension of the belt span.

Installation Tension Tension Mechanism

Belt Surface

Recommended Elongation Rate

Others

Measuring the installation tension

Tension Mark SystemPut tension marks on two locat ions of the belt under no-tension condit ion. Whi le measuring the distance between the tension marks, stretch the belt to obtain the specified elongation rate. Rotate the belt once or twice to stretch it uniformly and check the tension marks.

Sonic Tensiometer U-507

Elongation rate:1.0 %

Tension Mechanism

Tension pulley Adjust pulley

Belt Series

Standard elongation rateElongation rate range

As a rule, a tension pulley or an adjusting gap is required to apply tension to the belt. The approximate adjusting gap is ± (Belt length x 0.01).

Highly stretchable; you can easily attach this belt in a complicated layout without a tension mechanism.

As a pulley surface, use a surface with higher belt friction coefficient.*[Example] SBU Type: Use a polished surface as a pulley surface.

LBU Type: Use a glossy surface as a pulley surface.

Package SEB in a polyethylene bag used for shipping and store it in a cool dark place free from direct sunlight. Lightly wipe the belt with waste cloth impregnated with low-volatile alcohol. Then wipe it with dry waste cloth.

Normally, you can use the belt in a layout with the fixed center distance. Due to tolerance, however, the load applied to the bearing may become large. It is recommended to set the adjusting gap.Suitable for the layout where the center distance is fixed; the tension mechanism is not needed.

Note: When attaching the belt with the center distance fixed, choose the standard elongation rate or the medium value of the elongation rate range to select the belt type. Set tolerance of the inner peripheral length within the elongation rate range.

34 35

303300

XA, A, B, D, GS

F50, F100

G15, G30

XA, A, B, D GS F50, F100 G15, G30 N

1.0% 0.3% 2.0% 2.0% 5.0%

0.5 to 1.0% 0.2 to 0.4% 1.0 to 3.0% 1.0 to 4.0% 3.0 to 7.0%

N

Measures against the Following ProblemsTroubleshooting

Power Transmission

Complicated Layout (Pinching conveyance, etc.)

Failure

The belt comes off the pulley.

The bearings are excessively heated.

Belt deflection

The belt breaks

The specified speed is not achieved.

Failure Diagnosis Troubleshooting

The belt deviates at start-up and then returns to normal operation.

The starting torque is too high; further tighten the belt if possible.Change the belt type to a high-strength one.Lower the starting load.

The load is higher, compared with the belt effective tension; further tighten the belt if possible.Change the belt type to a high-strength one.Lower the starting load.

When the be l t i s s t re tched beyond the spec i f ied elongation rate, lower the rate.When the belt width is too large compared with the load, lower the width.

Correct the pulley shape.Check that the belt does not bend locally.Remove foreign mater from the belt if any.

The vibration frequency of the machine resonates with that of the natural v ibrat ion f requency of the bel t ; change the belt tension.

Check that the belt is not excessively stretched for instal lat ion or the belt edge is not damaged by the flame edge.

Check that the pulley shape is correct.Remove the pulley flange.Check that the gap between the pulleys is not small and the pulleys do not squeeze together.Adjust parallelism of the pulleys.Check that the pulley shaft does not bend.Check tha t the be l t i s s t re tched a t the spec i f ied elongation rate.

Select appropriate bearings according to the bearing allowable load and revolution speedCheck for shortage of lubricating oil.

Measure the pulley diameter. When the speed ratio is l a r g e , a d d t h e p i t c h l i n e p o s i t i o n t o t h e p u l l e y diameter.Measure revolution speed again.

Correct pulley parallelism.Check that the pulley does not bend.Check tha t the be l t i s s t re tched a t the spec i f ied elongation rate.Correct the pulley shape.

The belt comes off even when the load is low.

Check for excessive tension of the belt.

The belt tension is appropriate.

The belt deflects to the pulley axis. (Snaking)

The belt breaks at the early stage of operation.

The be l t moves to one s ide and then breaks. General ly, the belt breaks when i t winds around the p u l l e y o r c o n t a c t s t h e f r a m e . Investigate the cause.

The belt deflects perpendicularly to the d i rec t ion o f the pu l ley ax is . (Waving)

Even when further t ightening the belt, the revolution speed does not increase.

Normal when the load is low; the b e l t c o m e s o f f w h e n t h e l o a d becomes high.

● Keep fire away.

●When storing and shipping the belts, do not distort them excessively.● Store the belts in a well-ventilated, low-humidity place free from direct sunlight. 　The recommended storage temperature is – 10 to + 30℃.● Store the belts in the shipping packages.

1Function and PerformanceDANGER

DANGER

!

!

!

!

!

!

!

●Do not use the belt as hoisting or towing equipment.

●Do not use the belt beyond the acceptable ranges specified in the Catalogue.●When fire and malfunction of the control device are expected due to static electricity generating in the transmission device, use an antistatic belt. Set a neutralization apparatus in the transmission device.●Do not use the belt for conveying unpackaged food.

2Storage and Shipping

● Be sure to put a safety cover over the rotating part including the belt; hair, gloves or clothes may get 　caught in the belt pulley.● Before maintenance, inspection or replacement, be sure to turn off the switch and check that the　machine stops.

●When cleaning the belt, do not use chemicals harmful to humans.

● After replacing the belt with a new one, perform a test operation to adjust elongation rate and traveling of the belt.●When abnormal noise, snaking, deviation, slipping, etc. occur, stop the belt immediately for inspection.

●Do not leave the belts near fire.

●Do not burn used belts; harmful gasses may be generated.● Lawfully dispose of the used belts as industrial waste.

3 Installation and Daily Use

!

!

4Handling Used Belts

For Safe Use of Products※Before use, carefully read and follow the safety precautions below.

Symbol and Signal Word Severity of Risk

Indicates matters that may lead to imminent risk of death or serious injury if ignored or incorrectly handled.

Indicates matters that may lead to injury and physical damage if ignored or incorrectly handled.

Indicates matters that may lead to death or serious injury if ignored or incorrectly handled.

For safe use, this instruction manual and the product use various symbols and signal words.After fully understanding their meanings, read the safety precautions and follow the instructions.■Improper use ignoring the symbols and the signal words may result in the following risks.

!

!

!

DANGERWARNING

WARNING

WARNING

WARNING

WARNING

CAUTION

CAUTION

CAUTION

CAUTION

36 37

SEB TM - nitta.co.jp

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