Timing Belt Catalogue - OPIS Belt Online Catalogue... · 2013. 10. 24. · Timing Belts Index...

Timing Belt Catalogue

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The Company

T.D. Cross Ltd., reserve the right to change without notification dimensional and/or product specification shown in this catalogue, and to add or delete any product fromthe range in the interests of product development.All products shown in this catalogue are offered subject to the standard “Terms and Conditions of Sale”, copies on request. T.D. Cross Ltd., reserve copyright of thiscatalogue. No part thereof may be reproduced without prior permission.

Cross & Morse was established in 1984 through the amalgamation of two long standing and well respectedcompanies in the Power Transmission Industry, T.D. Cross and Morse Chain.

T.D. Cross & Sons was founded in 1870 in Birmingham, concentrating in the production of bicycle components underthe direction of the Cross family. They moved to the current factory site in 1950 and developed into production of apopular range of roller chain sprockets and gearing. The competitive pricing and quality of product soon establishedthe Company as a major supplier to both Agricultural and Industrial markets.

The Morse Chain Company was founded in 1894 also for the manufacture of bicycles in Pennsylvania, U.S.A. Thecompany moved into production of inverted tooth chain drives and established a manufacturing plant in London in1907, moving to the new Garden City of Letchworth, Herts. in 1918. The product range in the U.K. was developed toinclude Roller Chain and Sprockets, Couplings, Torque Limiters, Sprag Clutches and Timing Belt Drives, whilst in theU.S.A. by acquisition Morse also included the Denver Gearbox Range and the Sealmaster Bearing Products.

In 1987 Cross & Morse closed the Letchworth plant and centralised all production at the 10,000 sq. metre factory inGreat Barr, Birmingham where current production of Roller Chains, Sprockets, Gears, Timing Belt Pulleys, TorqueLimiters, Sprag Clutches and other specialised power transmission equipment is undertaken. In addition tomanufactured products, Cross & Morse are main agents for Morse-Emerson, U.S.A.; and Stieber Formsprag,Germany; providing an extensive range of power transmission products.

The company operates a policy of continued assessment to develop and improve its products and customer service.In pursuance of these objectives Cross & Morse has been successfully assessed by Lloyds, and is registered, as anapproved manufacturer of power transmission products to BS EN ISO 9001.

Timing Belts Index

CROSS+MORSE

Power Transmission Solutions

2weivrevO sevirD tleBBelt Drive Selection:

- Metric & Classical Belts 3-972-62stleB raeniL neerG -83stleB enahteruyloP -01noitallatsnI tleB54setalP gnipmalC

Classical Timing Belts and Pulleys 28-36Classic Belts:

30-92eg (XL, L, H)naR dradnatS -31Double Sided (XL, L, H) -

Classical Timing Belt Pulleys:32-34)H,LL,X( eroB toliP -35-36)H,L( eroB repaT -

Metric Timing Belts and Pulley 11-23Metric Belts:

- 11-14e (3M, 5M, 8M)gnaR dradnatS- 15-16Double Sided (5M, 8M, 14M)- Green Power Open Ended Belts 26-29

Metric Timing Belt Pulleys:- Pilot Bore (3M, 5M, 8M, 14M) 17-20 - Taper Bore (5M, 8M, 14M) 21-22

Polyurethane Timing Belts and Pulleys 37-44Platinum Timing Belts 46

Polyurethane Belts:39e (T2.5, T5, T10, AT5, AT10)gnaR dradnatS -44 stleB dednE nepO -

Polyurethane Timing Belt Pulleys:- Pilot Bore (T2.5, T5, T10, AT5, AT10) 40-43

T 24-25sehsuB eroB repaSpecial Belts 32

T 54sraB gnimiT 74gnitoohS elbuor

Timing Belt Catalogue_Cross + Morse 14/12/2010 12:17 Page 1

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Timing Belt Drives

2

Cross & Morse Timing Belt Drives take their place in industry as ahighly efficient, job proven medium for mechanical powertransmission. Because these drives combine many importantexclusive characteristics, they present an entirely different conceptin the transmission of power. They are highly versatile in application and speed range.Timing belt drives are positive and offer accurate synchronisationof speed, and often make possible worthwhile economies in thedesign of a machine, because they require less space, reducebearing specification, eliminate tension devices, yet assure anunusually high degree of efficiency.Virtually every industry has tested and approved timing beltdrives. They have been adopted as standard equipment by a widevariety of machine builders and equipment manufacturers.Millions of successful drives in operation without belt replacementfor more than five years bear testimony to these drives. Cross &Morse offer three types of timing belt drive to cover the fullspectrum of industrial requirements.

These are the original tooth belt drives, introduced for thetransmission of low torque instrumentation drives more than fortyyears ago, and since developed and adopted for millions of driveapplications. Eight different pitch configurations were produced,but later belt designs have eliminated the demand for all but threesizes. Cross & Morse offer complete drives to 1/5” (XL), 3/8” (L),and 1/2” (H) pitch sizes with both pilot bored and taper boredpulleys. Drives to other configurations can be supplied to order.The Classical Timing Belt is the ideal low cost drive for powers upto 25 KW with a wide range of both belts and pulleys availablefrom stock. Double sided belts and open ended belts can also besupplied.

The Classical Timing Belt Drives pages 29-36

Demands for ever increasing powers and speeds led to theintroduction of a Metric Series of High Torque Drive Belts, using aparabolic tooth profile to enable increased tooth contact betweenbelt and pulley. The new tooth profile has improved shear stressresistance, increased power capacity, and reduced noise levels.Pirelli introduced the RPP belt with an indentation at the top ofthe teeth, to allow local elastic deformation during meshing withpulley, and easier air discharge to further reduce noise levels.Cross and Morse combine RPP belts with std. Metric pulleys toprovide off-shelf drives in 4 pitches; 3mm (3M), 5mm (5M), 8mm(8M), and 14mm (14S).Further development created RPP Silver Belts in 8mm (8S) and14mm (14S) pitch with double power capacity; and Panther Beltsin 8mm (8G) and 14mm (14G) pitch with treble capacity; both stilloperating on standard metric pulleys allowing fullinterchangeability with existing drives. Drives up to 600 KW cannow be transmitted.

The Metric Series Belt Drives pages 11-22

These belts use steel tension cord encased in a polyurethane jacketwith integral teeth. The method of manufacture ensures tightcontrol of pitch length for applications where accurate positioningis required. Polyurethane is a non-crumbling, non-markingmaterial with excellent resistance to mineral oils, greases and lightacidic solutions making it an ideal material for food applications,on cigarette manufacturing machines and paper transportingsystems. Polyurethane belt drives are available in 3 pitch sizes,2.5mm (T2.5), 5mm (T5) and 10mm (T10), with a selection of pilotbore pulleys.Double sided belts and long open end belt lengths are alsoavailable. For reciprocating drives clamping plates are available toretain the belts.

Polyurethane Timing Belt Drives pages 37-44

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a. Determine Belt LengthFor drives with pulleys of equal numbers of teeth.Calculate Number Teeth in Belt Nc = 2. Ao + Z1

pFor drives with pulleys of dissimilar numbers of teeth.Calulate Number Teeth in BeltNc = 2.Ao + (Z1+ Z2) + 2.533p (Z2 - Z1)

Where Ao = Approximimate Centre Distance mmp = Belt Pitch mmZ1 = Number Teeth Small PulleyZ2 = Number Teeth Large Pulley

Note: Nc must always be greater than 0.9 (Z1 + Z2)Refer to standard Belt Tables (pages 12-13 Metric Drives,page 30-31 Classical) and select nearest belt length to numbers ofteeth calculated.

b. Determine Actual Shaft CentresThe actual centre distance A can then be determined from thefollowing formula where NA is number of teeth in beltselected.

A =p/4 (NA - Z1 + Z2 + (NA - Z1 + Z2) -2.027 (Z2-Z1) )

This will provide a reasonably accurate result but for fixed centredrives please contact Cross & Morse Engineering.

6. Factors to correct for Teeth in Mesh andBelt Length

a. Teeth in mesh factor f5Applicable only on drives with pulleys less than 18 teeth ordrive ratio greater than 3: 1. For a belt to transmit full powera minimum of 6 teeth must be in mesh on each pulley. Thenumber of teeth in mesh can determined from thefollowing formula:

Number Teeth in Mesh (TIM)= Z1 [0.5 - (Z2 - Z1)p]18.85A

The Design Power Pd must be multiplied by factor f5 taken from table 2a.

b. Belt Length Correction factor - f6To allow for variation in rates of loading a belt length factor f6 isapplied to the Design Power Pd for final selection power Ps. Thefactors, provided in table 4, only apply to HTD drives, for Classical timing belt drives f6 = 1. Thus:-Selection Power Ps = Pd . f5 . f6

7. Belt Width SelectionHaving determined Selection Power Ps, and knowing the size ofsmall pulley and relative shaft speed use the Rating Tables onpages 7-9 to determine Rated Power Pr. which is where appropriate columns for pulley size and shaft speed intersect intable for selected belt size. If a column for the actual shaft speed isnot available use the next lower speed available, and if shaft speedis below 100r.p.m. use column for 100 r.p.m., but multiply powerread off by actual shaft speed divided by 100. A belt width factorWf can then be determined by dividing the Selection Power Ps bythe Rated Power Pr.

Wf = PsPr

From the table immediately above the relevant Power Rating Table select the belt width which has a width factor equalor greater thanthe value calculated for Wf.

8. Confirmation of DriveRefer to pulley tables 14-21 (HTD Drives) or 29-33(Classical Belts) to confirm that pulley sizes (numbers of teeth andwidth) are available, and capable of accommodating shaft sizes,and that at least one pulley is of flanged construction. If belt speedexceeds 30M/S ensure no cast iron pulleys used; also pulleysshould be balanced.Ensure that calculated centre A can be accomodatedwith adjustment to correctly tension belt on assembly, and toenable belt to be fitted over pulley flanges if applicable, referto page 10.

Timing Belt Drive Selection

In order to select a Timing Belt Drive it is first necessary tocompile together all the relevant design parameters, to include:-

a. Type of driver, shaft speed, and power to be transmitted.b. Type of driven machinery, shaft speed or drive ratio.c. Approximate shaft centre distance required.d. Number of hours daily, drive will be used, and any special

operating conditions (temperature, abrasive dust, etc.).e. Shaft diameters and any space restrictions affecting pulley

diameters or widths.

With this information a suitable drive can be selected by theselection procedure in conjuction with the following guidelines:

a. Power transmission capabilities are always related to thesmallest pulley in the system, regardless of whether it is thedriving or driven pulley.

b. Where there is a choice of pulley combination for a givendrive consideration should be given to the following:-1. Larger pulleys reduce amount of belt flexing and therefore

improve belt life.2. Larger pulleys often enable use of narrower belts.3. Large pulleys can be more expensive.

c. There must be at least one flanged pulley in the drive, andwhere centre distance is more than 8 times the diameter ofthe smaller pulley, both pulleys should be flanged.

d. If shaft centre adjustment is inadequate to correctly tensionthe belt, an idler pulley will be required. It is preffered to runidlers on the back of the belt, when a ground back belt shouldbe used.

e. Cast Iron pulleys must not be used on drives where beltspeeds exceed 30 metres per second.

Selection Procedure1. Drive RatioWhere not known this can be obtained by dividing the speed of the faster shaft by the speed of the slower shaft. Note if the driven shaft is faster this is a Speed Increasing Drive.

2. Calculate the Design PowerThe design Power Pd is determined by multiplying thetransmitted motor power P by the application factors f1, f2, f3 and f4 as applicable.

Pd = P(f1 + f3 - f4) f2

Application Factor f1 - Service Factor- relates the type of driver anddriven equipment to the daily useage, refer Table 1.

Application Factor f2 - Speed Increasing Drives - refer Table 2 for factorrelevent to respective speed increase ratio.

Application Factor f3 - If an idler is used add 0.2.

Application Factor f4 - If machinery only used intermittently orseasonally deduct 0.2 from service factor.

3. Select Belt PitchApplying the calculated Design Power and the speed of the smallestpulley to the graphs on pages 5-6 to select suitable belt pitch for theapplication. Using this pitch of belt should provide a wellproportioned drive, but where space limitations apply, another pitchof belt may be required. Both Metric (HTD) and Classical Belt Drivesare available for selection. Generally HTD Belts provide a morecompact, quieter drive, and are preffered for new applications,however classical belts offer a wider selection of drive ratios with std.pulleys, and for one-off drives often a lower cost.

4. Pulley SelectionRefer to Standard Drive Ratios - Table 3 and select a suitablecombination of pulleys to provide the correct drive ratio. Foreconomic and availability reasons it is preferable to use pulleys ofmaximum 80 teeth, and to minimise belt fatigue a minimum of 20Teeth (28 Teeth 14M drives).From the appropiate pulley dimension tables confirm that pulleysizes selected are available and will accommodate shaft diametersand not exceed space limitations.

5. Determine Belt Length and Center DistanceHaving selected belt size (pitch), numbers of teeth in pulleys, andknowing approximate shaft centres one can select belt length andcalculate actual centre distance.

p 2 100Ao

2 2

101022

2

3


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0.90

261- 400551- 800

901- 12702051- 2500

_

_

_

____

_

_

_

The machines listed below are representative examples only. Select the classwhose load characteristics most closely approximate those of the machine being used. For drives with heavy pulsating or high shock loads, consultCross & Morse.

Timing Belt Drives Selection

Table 1 - Service Factors - f1

4

DRIVEN MACHINE (LOAD)

Table 2 - Speed Increase Factor - f2 Table 2a - Teeth in mesh Factor - f5

Table 4 - Belt Length Factor - f6 - HTD Drives

DRIVEN MACHINE (LOAD) TYPES OF DRIVER

Electric Motor AC - Star Delta startDC - Shunt Wound

Internal Combustion Engines and other prime moves fitted with Centrifugal Clutches. Dry or Fluid Couplings orElecronic Soft Start Start Devices.

Smooth

MediumShock

HighShock

HeavyShock

LightShock

LoadType Typical Machinery

‘SOFT STARTS’ ‘HEAVY STARTS’

Electric Motor AC - Direct-on-Line startDC - Series and Compound Wound

Hydraulic MotorsInternal Combustion Engines with Mechanicl DrivePrime movers not fitted with soft start devices

Operating Hours per DayOperating Hours per Day

under 10 10-16 Over 16 under 10 10-16 Over 16

Business Equipment. Light Domestic Machinery,Tachometers, Camera and Radar Equipment

Liquid Agitators, Centrifugal Pumps andCompressors, Uniformly Loaded Belt Conveyors,Fans up to 71/2 kW, Calenders. Rotary Screens,Dryers, Exhausters, Woodworking Machinery.

Mixers, Belt Conveyors. Fans over 71/2 kW,Generators, Vibrating Screens, Augers,Granulators, Laundry and Printing Machinery,Machine Tools.

Bucket, Pan and Screw Conveyors,Reciprocating Pumps and Compressors,Exciters, Paper and Textile Machinery.

Mills, Crushers, Hoists, Dredge Pumps,Brickwork and Rubber Machinery, Oil FieldEquipment.

1.0

1.3

1.5

1.7

1.9

1.2

1.4

1.7

1.9

2.0

1.4

1.6

1.9

2.0

2.1

1.2

1.6

1.9

2.0

2.2

1.6

1.8

2.0

2.2

2.3

1.8

2.0

2.2

2.3

2.4

Speed IncreaseDrive Ratio

Factor f2

1.00to

1.24

1.00

1.25to

1.74

1.06

1.25to

1.74

1.06

1.75to

2.49

1.12

2.50to

3.49

1.18

3.50and

above

1.25

TIM 6+ 5 - 6 4 - 5 3 - 4 below 3

f5 1.00 1.25 1.65 2.5 5.0

Table 3 - Drive Ratios with Standard Pulleys

10 12 13* 14 15 16 17* 18 19 20 21 22 24 26 28 30 32 34 36 38

Number Teeth on Small Driver Pulley

1213*1415

1617*181920

2122242628

3032343638

4044485660

6472808490

96112 144168192

N0. T

eeth

on

Larg

e -

Driv

en P

ulle

y

1.201.301.401.50

1.601.701.801.902.00

2.102.202.402.602.80

3.003.20

3.60

4.004.404.80

6.00

7.20

8.40

9.60____

_

_

_

_

_

_ _

_

1.001.081.171.25

1.331.421.501.581.67

1.751.832.002.172.33

2.502.67

3.00

3.333.674.00

5.00

6.00

7.00

8.00

_

____

_

_

_

_

_

1.001.081.15

1.231.311.381.461.54

1.611.691.852.002.15

2.312.46

2.77

3.083.383.69

4.61

5.54

6.46_

____

_

_

_

_

_

_

1.001.07

1.141.211.291.361.43

1.501.571.712.862.00

2.142.29

2.57

2.863.143.43

4.29

5.14

6.00

6.86

_

____

_

_

_

_

_

1.001.061.131.191.25

1.311.381.501.631.75

1.882.00

2.25

2.502.753.00

3.75

4.50

5.25

6.00

_

____

_

_

_

_

_

1.00

1.071.131.201.271.33

1.401.471.601.731.87

2.002.13

2.40

2.672.933.20

4.00

4.80

5.60

6.40

_

____

_

_

_

_

_

1.001.061.121.18

1.231.291.411.531.65

1.761.88

2.12

2.352.592.82

3.53

4.24

4.94_

____

_

_

_

_

_

_

1.001.061.11

1.171.221.331.441.56

1.671.77

2.00

2.222.442.67

3.33

4.00

4.67

5.33

_

____

_

_

_

*13 & 17 Tooth Pulleys available‘L’ Series Pulleys only

40

1.00

1.051.101.201.301.40

1.501.60

1.80

2.002.202.40

3.00

3.60

4.20

4.80

1.001.051.141.241.33

1.431.52

1.71

1.902.102.29

2.86

3.43

4.00

4.57

_

_

_

____

_

_

_

_

_

_

____

_

_

_

1.001.05

1.101.161.261.371.48

1.581.68

1.89

2.112.322.53

3.16

3.79

4.42

5.05

1.001.091.181.27

1.361.451.551.641.73

1.822.002.182.552.73

2.913.273.643.824.09

4.365.096.557.648.73

1.001.081.16

1.251.331.421.501.58

1.671.832.002.332.50

2.673.003.333.503.75

4.004.676.007.008.00

1.001.08

1.151.231.311.381.46

1.541.691.852.152.31

2.462.773.083.233.46

3.694.315.546.467.38

1.00

1.071.141.211.291.36

1.431.571.712.002.14

2.292.572.863.003.21

3.434.005.146.006.86

1.001.071.131.201.27

1.331.471.601.872.00

2.132.402.672.803.00

3.203.734.805.606.40

1.001.061.121.19

1.251.371.501.751.87

2.002.252.502.622.81

3.003.504.505.256.00

1.001.061.12

1.181.291.411.65

1.882.122.35

2.65

3.294.234.945.65

1.001.06

1.111.221.331.561.67

1.782.002.222.332.50

2.673.114.004.675.33

_

_

_

1.00

1.051.161.261.471.58

1.681.892.11

2.37

2.953.794.425.05

_

_

1.001.101.201.401.50

1.601.802.002.102.25

2.402.803.604.204.80

3M5M8M

14M

Factor f6 1.25

up to 190up to 440up to 630up to 1350

191- 260441- 550631- 900

1351- 1770

1.11 1.0 0.95

2501-3400

401- 600801- 1100

1271- 17903401+

0.85

601+1101+1791+

1.05

1771-2050

Belt Length mmBelt Size Pitch


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5

Shaft Speed Smaller Pulley - R.P.M.

0.1

30

40

50

70

7,00

0

Des

ign

Pow

er k

WBelt Selection Graph forClassical Series Belts

10 20 30 40 50

100

200

400

500

700

1,00

0

2,00

0

3,00

0

4,00

0

10,0

0070

12,0

00

5,00

0

300

XL

L

H

0.3

0.4

0.5

0.7

1.0

2

3

4

5

0.2

7

20

10


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Shaft Speed Smaller Pulley - R.P.M.6

10,0

0010 20

700

500

400

300

200

100

70

50

40

30

20

10

7

5

4

3

2

1.0

0.7

0.5

0.4

0.3

0.2

0.1

30 40 50 70 100

200

300

400

500

700

1,00

0

2,00

0

3,00

0

4,00

0

5,00

0

7,00

0

Des

ign

Pow

er k

W

3M

14G

14S

14M

8G

8S

8M

5M

Belt Selection Graph forMetric Series Belts

15,0

00


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100200300400500600800

10001200150018002000240028003000350040004500

20Belt Width mm 8M Belt

1.00

30

1.58

50

2.74

RPM

of S

mal

l Pul

ley

100200300500600800

100012001500180020002400280032004000500060008000

100001200014000

Number of Teeth on Small Pulley

12 14 15 16 18 20 21 22 24 26 28 30 32 36 40 44 48 60

.023

.039

.053

.078

.090

.111

.132

.151

.178

.204

.221

.253

.285

.314

.370

.435

.495

.603

.695

.027

.046

.062

.091

.105

.130

.154

.176

.208

.239

.258

.296

.332

.366

.432

.508

.578

.704

.811

.899

.966

.029

.049

.066

.098

.113

.141

.167

.192

.226

.260

.280

.321

.360

.398

.470

.555

.627

.762

.873

.9651.026

.032

.054

.073

.107

.123

.153

.180

.207

.244

.280

.303

.347

.389

.429

.505

.594

.675

.818

.9351.0261.087

.037

.062

.084

.124

.142

.176

.208

.238

.281

.322

.349

.399

.448

.494

.581

.681

.773

.9311.0561.1441.193

.042

.071

.096

.140

.161

.200

.236

.270

.319

.366

.396

.453

.507

.559

.657

.769

.8711.0431.1711.2521.280

.045

.075

.100

.148

.170

.212

.250

.286

.338

.383

.419

.480

.538

.592

.696

.813

.9201.0961.2231.2951.306

.047

.079

.107

.157

.180

.224

.264

.302

.358

.410

.443

.508

.568

.626

.735

.858

.9691.1501.2761.3391.333

.052

.088

.119

.175

.200

.248

.293

.336

.397

.455

.492

.563

.630

.694

.813

.9481.0681.2591.3821.4271.386

.057

.097

.131

.192

.220

.273

.323

.370

.437

.501

.541

.619

.692

.762

.8921.0381.1651.3601.4701.4821.390

.063

.106

.143

.210

.241

.299

.353

.404

.477

.547

.591

.675

.755

.831

.9721.1281.2621.4621.5591.5381.382

.068

.115

.155

.228

.262

.325

.383

.439

.518

.594

.641

.733

.819

.9011.0521.2161.3551.5521.6201.5541.330

.074

.124

.168

.247

.283

.351

.414

.474

.560

.641

.692

.791

.884

.9711.1321.3071.4521.6461.6931.5701.248

.085

.143

.194

.284

.325

.404

.477

.546

.644

.737

.796

.9091.0141.1131.2931.4841.6351.8061.7761.507

.096

.162

.220

.322

.369

.458

.541

.619

.713

.835

.9021.0281.1461.2561.4531.6571.8091.9391.800

.108

.182

.246

.361

.414

.513

.606

.694

.818

.9351.0091.1491.2791.4001.6131.8251.9712.0401.756

.120

.202

.273

.401

.459

.570

.673

.770

.9071.0361.1171.2711.4131.5431.7701.8862.1202.1051.637

.156

.264

.357

.524

.599

.742

.8771.0031.1801.3441.4471.6401.8141.9702.2222.4162.4602.040

.195

.328

.445

.652

.747

.9251.0901.2461.4631.6631.7872.0162.2162.3872.6382.7602.635

7

Power Rating Tables - Standard Metric Timing Belts

Belt Width mm 3M Belt 6 9 15

0.60 1.00 1.89Power Ratings (kW) for 9mm wide 3M Belt

Power Ratings (kW) for 9mm wide 5M Belt

Power Ratings (kW) for 20mm wide 8M Belt

Belt Width mm 14M Belt

Width Factor

55 8540 115 170

1.44 2.32 3.21 4.821.00Power Ratings (kW) for 40mm wide 14M Belt

Width Factor

Belt Width mm 5M Belt 9 15 25

1.00 1.93 3.48Width Factor

72


22

RPM

of S

mal

l Pul

ley

24 26 28 30 32 34 36 38 40 44 48 56 64 72 80

.35

.59

.80

.991.171.351.671.972.262.673.053.303.774.214.424.93

.39

.66

.891.101.301.491.852.192.512.963.393.664.184.664.905.45

.47

.791.071.331.571.802.232.633.013.564.074.395.005.585.856.49

.51

.861.161.441.701.952.422.863.273.864.414.765.426.046.337.027.64

.55

.931.261.561.842.112.623.093.544.174.765.145.856.516.827.548.198.75

Width Factor

85

4.77

.43

.72

.981.211.431.642.042.412.763.263.724.024.595.125.375.97

.591.001.351.671.982.272.813.323.804.485.115.526.276.977.308.068.739.31

.631.071.451.792.122.433.013.554.074.795.475.906.707.447.798.589.289.86

.681.141.541.912.262.593.213.794.345.115.836.287.137.918.279.109.81

10.40

.721.211.642.032.402.763.424.034.615.436.196.677.568.388.769.61

10.3310.92

.811.361.842.282.703.093.834.525.166.076.927.458.439.319.72

1.06211.3511.91

.901.512.042.532.993.434.255.015.726.737.658.239.30

10.2410.6711.6012.3212.82

1.081.812.463.053.604.125.106.016.878.059.149.81

11.0312.0712.5213.4614.08

1.272.132.883.574.224.835.987.048.039.40

10.6411.3912.7313.8314.2915.14

1.462.453.324.124.865.566.888.099.22

10.7612.1412.9714.3915.5015.93

1.652.783.774.675.516.317.799.16

10.4212.1313.6414.5216.0017.06


28

RPM

of S

mal

l Pul

ley

29 30 32 34 36 38 40 44 48 52 56 60 64 68 72 80

2.424.085.526.858.099.27

10.3911.4713.5115.4218.0720.4821.9525.19

2.424.085.526.858.099.27

10.3911.4713.5115.4218.0720.4821.9525.19

2.534.255.767.148.449.67

10.8411.9614.0616.0718.8221.3122.8326.15

2.634.436.007.448.79

10.0711.2812.4514.6616.7219.5722.1423.7127.0929.6931.43

2.854.796.488.049.49

10.8712.1913.4515.8218.0321.0823.8125.4528.9631.5433.10

3.065.156.978.64

10.2111.6913.1014.4516.9919.3622.5925.4727.1930.7933.3134.63

3.285.517.479.26

10.9312.5114.0215.4618.1820.6924.1127.1328.9232.5834.9835.99

3.505.887.979.87

11.6613.3414.9516.4819.3722.0225.6328.7830.6334.3236.5637.19

3.726.258.47

10.5012.3914.1915.8917.5120.5623.3727.1630.4232.3236.0038.0338.19

4.177.019.50

11.7713.8915.8917.7919.6022.9826.0730.1833.6735.6439.19

4.637.78

10.5413.0615.4017.6219.7121.7125.4228.7833.2036.8638.8442.11

5.108.57

11.6014.3716.9419.3721.6723.8427.8831.5036.2039.9641.9244.70

5.579.36

12.6715.6918.5021.1523.6426.0030.3534.2239.1542.9644.8346.94

6.0510.1713.7617.0420.0822.9425.6328.1732.8236.9342.0545.8447.57

6.5410.9914.8718.4021.6824.7527.6430.3635.3139.6344.9048.6050.12

7.0311.8115.9819.7823.3026.5829.6632.5537.7942.3047.6751.2152.45

7.5312.6517.1121.1724.9228.4231.7034.7640.2744.9650.37

8.5414.3519.4123.9928.2232.1535.8039.1945.2050.1655.48

RPM

of S

mal

l Pul

ley

10

100200300500600800

100012001450175020002400280032004000500060008000

100001200014000


12 14 15 16 18 20 21 22 24 26 28 30 32 36 40 44 48 60

.007

.013

.018

.026

.029

.038

.044

.051

.059

.069

.076

.087

.099

.109

.131

.156

.179

.222

.263

.302

.338

.008

.016

.021

.031

.036

.046

.054

.063

.073

.084

.092

.107

.121

.134

.159

.189

.217

.270

.318

.365

.406

.009

.018

.026

.038

.044

.054

.064

.074

.086

.099

.111

.127

.142

.159

.187

.222

.255

.317

.375

.426

.474

.009

.019

.028

.041

.048

.059

.068

.079

.092

.107

.119

.136

.154

.170

.202

.239

.275

.341

.401

.458

.507

.011

.021

.029

.044

.051

.064

.076

.086

.101

.116

.127

.147

.166

.184

.217

.257

.295

.366

.429

.489

.542

.013

.024

.034

.051

.058

.073

.086

.099

.114

.132

.147

.169

.189

.209

.249

.293

.335

.415

.486

.551

.607

.014

.028

.039

.058

.066

.083

.097

.112

.129

.149

.166

.190

.214

.235

.278

.328

.376

.463

.541

.610

.670

.014

.029

.041

.061

.069

.087

.102

.119

.136

.157

.174

.200

.225

.249

.293

.346

.396

.488

.567

.639

.700

.016

.031

.044

.064

.074

.092

.109

.126

.144

.167

.184

.212

.237

.262

.310

.365

.418

.512

.595

.668

.730

.018

.036

.049

.073

.083

.102

.121

.139

.161

.185

.204

.234

.262

.290

.341

.403

.459

.562

.652

.727

.790

.019

.039

.054

.079

.091

.109

.132

.152

.175

.204

.224

.257

.287

.318

.373

.439

.501

.610

.705

.781

.843

.021

.044

.059

.087

.099

.124

.146

.167

.192

.222

.245

.280

.313

.346

.406

.478

.542

.660

.758

.838

.898

.023

.048

.064

.094

.107

.134

.159

.182

.209

.240

.265

.303

.340

.375

.439

.516

.584

.708

.810

.888

.942

.026

.053

.071

.109

.117

.146

.172

.197

.227

.260

.287

.327

.366

.403

.473

.554

.627

.756

.861

.939

.989

.029

.061

.083

.119

.137

.169

.199

.227

.262

.300

.330

.376

.421

.463

.541

.630

.712

.849

.9541.0221.050

.034

.071

.096

.137

.157

.194

.227

.258

.297

.340

.375

.426

.476

.522

.610

.708

.798

.9441.0471.1051.112

.039

.081

.109

.156

.177

.219

.257

.292

.335

.381

.419

.478

.532

.584

.678

.786

.8811.0301.1231.1571.122

.046

.091

.122

.175

.199

.245

.287

.327

.373

.424

.466

.529

.589

.645

.748

.864

.9641.1171.2011.2101.133

.058

.116

.154

.222

.252

.308

.361

.411

.469

.534

.587

.665

.738

.806

.9311.0621.1701.3031.3141.186

100200300400500600700800

10001200150018002000250030003500


INDEX BACK NEXT

Te

l +

44

1

21

3

60

0

15

5 F

ax

+

44

1

21

3

25

1

07

9 E

ma

il s

ale

s@

cr

os

sm

or

se

.c

om

8

Power Rating Tables - Silver &Gold Timing Belts

Belt Width mm 8S Belt


22

RPM

of S

mal

l Pul

ley

24 26 28 30 32 34 36 38 40 44 48 56 64 72 80

Width Factor

20 30 50 85

1.00 1.58 2.74 4.77Power Ratings (kW) for 20mm wide Silver 8S Belt

2050

100200300500700

10001200150018002000250030003500400045005000

0.140.350.681.141.552.272.923.824.385.175.936.417.568.659.67

10.6511.5812.47

0.150.380.751.261.712.513.224.214.835.706.537.068.339.52

10.6411.7112.7213.68

0.160.410.821.381.872.743.534.615.286.237.147.729.10

10.4011.6212.7713.8614.89

0.180.440.881.502.032.983.835.005.736.777.758.389.88

11.2812.5913.8315.0016.10

0.190.470.941.622.193.224.145.406.197.318.379.05

10.6612.1613.5714.9016.1417.29

0.200.501.011.742.363.464.455.816.667.868.999.72

11.4413.0514.5515.9517.2618.48

0.210.531.071.862.523.704.766.227.128.419.62

10.4012.2313.9415.5317.0118.3919.65

0.230.571.131.982.693.945.086.637.598.96

10.2511.0713.0214.8316.5118.0619.5020.81

0.240.601.202.112.864.195.397.048.069.51

10.8811.7513.8215.7217.4919.1120.6021.95

0.250.631.262.233.034.445.717.458.54

10.0711.5212.4414.6116.6118.4620.1521.6923.07

0.280.691.382.483.374.946.358.299.49

11.1912.8013.8116.2118.4020.4022.2123.8325.28

0.300.761.512.743.715.447.009.13

10.4612.3314.0815.2017.8020.1722.3224.2325.91

0.350.881.763.264.416.478.32

10.8412.4114.6116.6717.9820.9923.6926.0728.13

0.401.012.013.785.127.519.65

12.5814.3916.9319.2820.7624.1627.1429.69

0.451.132.274.315.848.57

11.0114.3416.3919.2521.9023.5527.3030.49

0.501.262.524.856.589.64

12.3816.1118.4021.5924.5226.3330.38

Belt Width mm 14S Belt


28

RPM

of S

mal

l Pul

ley

29 30 32 34 36 38 40 44 48 52 56 60 64 68 72 80

Width Factor

55 8540 115 170

1.44 2.32 3.21 4.821.00Power Ratings (kW) for 40mm wide Silver 14S Belt

10205070

100200300500700

100012001500180020002500300035004000

0.400.812.022.824.037.50

10.1614.9019.1524.9628.5633.6138.3241.2848.1154.1559.3863.79

0.420.842.092.924.187.82

10.5915.5319.9626.0129.7535.0139.8942.9650.0356.2361.5765.99

0.430.862.163.034.328.13

11.0216.1620.7727.0730.9536.4141.4744.6551.9458.3163.7368.16

0.460.922.313.234.618.78

11.9017.4322.4129.1933.3739.2344.6548.0455.7662.4267.9872.37

0.490.982.453.434.909.43

12.7818.7224.0631.3335.8142.0747.8451.4359.5766.4972.12

0.521.042.593.635.19

10.0913.6720.0325.7333.5038.2744.9251.0454.8463.3670.4976.15

0.551.102.743.835.47

10.7514.5721.3427.4235.6840.7447.7954.2558.2467.1374.43

0.581.152.884.035.76

11.4215.4822.6729.1237.8743.2350.6857.4661.6470.8678.29

0.631.273.174.446.34

12.6817.3225.3632.5642.3148.2656.4863.9068.4378.22

0.691.383.464.846.92

13.8319.1928.0936.0646.8153.3462.3170.3375.1785.39

0.751.503.755.247.49

14.9821.0830.8739.6051.3558.4568.1576.7381.84

0.811.614.035.658.07

16.1323.0133.6743.1855.9263.6074.0083.0988.41

0.861.734.326.058.64

17.2824.9636.5146.7960.5468.7779.8489.3894.88

0.921.844.616.459.22

18.4326.9339.3850.4565.1873.9685.6695.59

101.20

0.981.964.906.869.80

19.5828.9242.2854.1369.8579.1591.45

101.71

1.042.075.197.26

10.3720.7330.9345.2157.8474.5384.3597.19

1.152.315.768.07

11.5223.0334.5151.1465.3483.9594.74

108.53

Belt Width mm 8G Belt


22

RPM

of S

mal

l Pul

ley

24 26 28 30 32 34 36 38 40 44 48 56 64 72 80

Width Factor

20 30 50 85

1.00 1.50 2.50 4.25Power Ratings (kW) for 20mm wide Gold 8G Belt

2050

100200300500700

10001200150018002000250030003500400045005000

0.180.400.751.381.973.104.175.726.728.199.62

10.5512.8415.0617.2319.3521.4223.44

0.200.450.821.522.183.424.606.317.419.03

10.6011.6314.1516.6018.9821.3023.5725.78

0.220.490.901.662.383.745.046.908.119.88

11.6012.7215.4718.1420.7423.2725.7328.13

0.240.530.981.812.594.075.477.508.81

10.7312.6013.8216.8119.7022.5125.2527.9030.49

0.250.571.061.952.804.395.928.119.52

11.6013.6114.9318.1521.7724.2927.2330.0832.84

0.270.621.142.103.014.726.368.72

10.2412.4714.6316.0519.5022.8426.0829.2232.2535.19

0.290.661.222.253.225.066.819.33

10.9613.3415.6617.1720.8624.4327.8731.2134.4337.54

0.310.701.302.403.435.397.269.95

11.6914.2216.6918.3022.2326.0129.6733.2036.6039.88

0.330.751.382.553.655.737.72

10.5712.4215.1117.7319.4423.6027.6131.4735.2038.7742.21

0.350.791.462.703.866.078.18

11.2013.1516.0018.7720.5824.9829.2133.2837.1940.9444.52

0.390.881.633.004.306.769.10

12.4614.6317.8020.8822.8827.7532.4136.8941.1645.2449.11

0.430.971.793.314.747.45

10.0313.7416.1319.6223.0025.2030.5335.6340.4945.1249.50

0.511.162.133.945.648.86

11.9316.3319.1723.2927.2929.8836.1442.0747.6752.83

0.601.342.484.586.56

10.3013.8618.9722.2527.0231.6234.6041.7648.4854.75

0.671.532.835.237.48

11.7515.8121.6325.3730.7835.9939.3547.3754.83

0.371.733.195.898.43

13.2317.8024.3328.5234.5740.3844.1152.96

Belt Width mm 14G Belt


28

RPM

of S

mal

l Pul

ley

29 30 32 34 36 38 40 44 48 52 56 60 64 68 72 80

Width Factor

55 8540 115 170

1.37 2.12 2.87 4.251.00Power Ratings (kW) for 40mm wide Gold 14G Belt

10205070

100200300500700

100012001500180020002500300035004000

0.751.443.284.446.13

11.4316.4726.0735.2748.5657.1669.7381.9589.92

109.27127.78145.46162.27

0.781.503.424.626.37

11.8917.1327.1236.6950.5159.4472.5185.2093.48

113.54132.71150.98168.30

0.811.563.554.806.62

12.3617.8028.1738.1152.4661.7475.3088.4797.05

117.82137.64156.48174.30

0.861.673.825.177.12

13.2919.1330.2940.9756.3966.3680.9095.02

104.20126.39147.49167.44186.19

0.911.794.095.537.62

14.2220.4832.4243.8660.3571.0086.54

101.60111.38134.98157.31178.33

0.971.914.365.908.13

15.1721.8434.5846.7664.3475.6892.21

108.20118.59143.56167.10189.13

1.022.034.636.278.64

16.1223.2136.7449.6968.3480.3897.90

114.83125.81152.14176.85

1.072.154.906.649.15

17.0824.5938.9252.6372.3785.10

103.61121.48133.04160.71186.54

1.182.365.467.39

10.1919.0127.3743.3158.5680.4994.61

115.10134.81147.52177.78

1.292.586.028.15

11.2420.9630.1947.7664.5588.69

104.19126.64148.17162.01194.73

1.402.796.598.92

12.2922.9433.0352.2570.6096.94

113.83138.24161.55176.47

1.503.017.169.69

13.3624.9335.9056.7776.70

105.25123.53149.86174.91190.88

1.613.227.74

10.4814.4426.9438.7961.3482.84

113.61133.26161.50188.25205.21

1.723.438.32

11.2715.5328.9741.7165.9489.03

122.02143.03173.15201.53219.44

1.823.658.91

12.0616.6231.0144.6570.5795.25

130.45152.83184.78214.74

1.933.869.50

12.8617.7333.0747.6175.23

101.51138.92162.64196.40

2.154.29

10.7014.4819.9637.2353.5884.64

114.12155.94182.30219.52


INDEX BACK NEXT

Te

l +

44

1

21

3

60

0

15

5 F

ax

+

44

1

21

3

25

1

07

9 E

ma

il s

ale

s@

cr

os

sm

or

se

.c

om

RPM

of S

mal

l Pul

ley

9

Belt Width Reference

Belt Width Factor

050 075 100

0.42 0.71 1.00

Power Rating Tables -Classical Timing BeltsPower Ratings (kW) for 3/8” wide XL Series Belts (Size XL037)

Number of Teeth Small Pulley

10 11 12 14 15 16 18 20 21 22 24 26 28 30 32 36 40100200300400500600800

1000120014001500160017502000240028003000320035004000450050006000700080009000

10000

.004

.008

.012

.016

.020

.025

.034

.042

.050

.059

.062

.070

.076

.087

.004

.009

.014

.018

.023

.027

.036

.046

.055

.064

.070

.076

.081

.095

.112

.132

.140

.151

.165

.005

.010

.015

.020

.025

.030

.040

.050

.060

.071

.075

.084

.090

.102

.123

.144

.155

.165

.180

.205

.231

.257

.006

.011

.017

.023

.029

.035

.048

.060

.071

.084

.090

.096

.104

.119

.142

.167

.180

.190

.210

.240

.269

.297

.006

.012

.019

.025

.031

.037

.050

.065

.077

.090

.096

.102

.112

.130

.155

.180

.192

.200

.225

.288

.310

.380

.441

.007

.013

.020

.027

.033

.040

.054

.069

.081

.096

.102

.111

.120

.136

.165

.192

.205

.220

.239

.272

.306

.340

.405

.468

.007

.015

.022

.029

.037

.046

.063

.077

.091

.109

.115

.123

.134

.155

.184

.215

.230

.247

.268

.305

.343

.380

.451

.522

.589

.654

.713

.008

.016

.025

.033

.042

.050

.069

.086

.102

.119

.127

.136

.151

.171

.205

.240

.257

.272

.299

.340

.380

.420

.500

.575

.648

.713

.775

.009

.018

.026

.035

.044

.054

.071

.090

.108

.125

.134

.144

.157

.180

.215

.251

.267

.286

.312

.357

.400

.441

.522

.600

.675

.742

.802

.009

.019

.028

.037

.046

.056

.075

.094

.113

.132

.140

.150

.165

.188

.224

.263

.280

.299

.326

.372

.416

.460

.545

.625

.698

.769

.827

.010

.020

.030

.040

.050

.060

.084

.102

.123

.144

.155

.165

.179

.205

.247

.286

.305

.326

.355

.405

.453

.500

.589

.675

.750

.819

.880

.011

.022

.033

.044

.055

.066

.088

.110

.132

.155

.167

.177

.194

.222

.266

.309

.331

.352

.384

.436

.487

.537

.632

.719

.795

.863

.919

.012

.024

.036

.048

.060

.071

.096

.119

.142

.167

.180

.190

.210

.240

.286

.332

.357

.378

.413

.468

.522

.575

.675

.763

.840

.907

.959

.012

.025

.038

.050

.063

.077

.102

.130

.155

.180

.192

.205

.224

.257

.305

.357

.380

.405

.441

.500

.555

.610

.713

.802

.880

.942

.986

.013

.027

.040

.054

.069

.081

.111

.136

.165

.192

.205

.220

.239

.272

.326

.378

.405

.430

.468

.529

.589

.648

.750

.825

.915

.9781.030

.015

.029

.046

.063

.077

.091

.123

.155

.184

.215

.230

.247

.268

.305

.365

.423

.451

.479

.522

.589

.654

.713

.819

.898

.9781.035

.016

.033

.050

.069

.086

.102

.136

.171

.205

.240

.257

.272

.299

.340

.405

.468

.500

.529

.575

.648

.713

.775

.880

.9591.030

Belt Width Reference

Belt Width Factor

075 100 150 200 300

0.71 1.00 1.56 2.14 3.36

RPM

of S

mal

l Pul

ley

Power Ratings (kW) for 1” wide L Series Belts (3/8” Pitch)Number of Teeth Small Pulley

12 13 14 15 16 17 18 19 20 21 22 24 26 28 30 32 36 40100200300400500600700800

10001200140015001750200022002500280030003200350040004500500055006000

0.040.100.140.190.230.280.330.370.460.560.650.700.810.931.011.161.291.38

0.050.100.150.200.250.310.350.400.510.600.710.760.871.011.101.251.401.491.591.73

0.050.110.160.220.280.330.380.430.540.660.760.810.951.081.191.341.501.601.701.862.11

0.060.120.170.230.290.350.410.460.580.700.810.871.011.161.271.431.601.711.821.982.242.502.742.973.20

0.060.130.190.250.310.370.430.500.620.750.870.931.081.231.351.531.711.821.942.112.392.652.923.153.39

0.070.130.200.260.330.400.460.530.660.790.920.981.151.311.431.621.811.932.042.232.512.803.063.313.54

0.070.140.210.280.350.420.490.560.700.840.971.041.211.381.511.721.912.042.162.352.662.943.223.473.71

0.070.150.220.300.370.440.510.590.740.881.031.101.281.451.601.812.012.142.272.472.783.073.363.613.84

0.070.160.230.310.390.470.540.620.780.931.081.161.341.531.681.892.102.252.382.582.903.213.493.753.98

0.080.160.250.330.410.490.570.620.810.971.131.211.411.601.751.982.212.352.492.703.033.343.633.884.12

0.090.170.250.340.430.510.600.690.851.011.191.271.481.681.842.072.312.452.602.813.163.473.764.014.24

0.100.190.280.370.470.560.650.750.931.111.291.381.601.821.992.252.492.652.803.033.393.713.994.234.42

0.100.200.310.400.510.600.710.811.001.201.401.491.731.962.152.422.682.843.013.253.603.924.204.434.59

0.110.220.330.430.540.650.760.871.081.291.501.601.862.102.302.592.863.033.203.443.804.124.374.574.68

0.120.230.350.460.580.700.810.931.161.381.601.721.982.252.452.753.033.213.393.633.984.294.524.674.74

0.130.250.370.500.620.750.870.981.231.471.711.822.112.372.602.913.203.393.563.804.164.444.634.724.72

0.140.280.420.560.700.840.971.111.381.651.912.042.352.662.883.213.513.713.884.124.434.664.73

0.160.310.470.620.780.931.081.231.531.822.102.252.592.903.163.503.803.994.164.384.634.75

RPM

of S

mal

l Pul

ley

Power Ratings (kW) for 1” wide H Series Belts (1/2” Pitch)Number of Teeth Small Pulley

14 16 18 19 20 21 22 24 26 28 30 32 36 40 44 48100200300400500600700800900

10001100120014001500160017502000220025002800300032003600400044004800500054006000

0.190.370.550.740.931.111.291.481.661.842.03

0.210.430.630.841.051.271.481.691.892.102.312.522.943.153.363.664.18

0.240.480.720.951.191.421.661.892.132.362.602.833.303.543.774.124.685.145.826.486.927.35

0.250.500.751.001.251.511.752.002.252.502.752.993.483.733.984.334.945.426.126.827.277.738.459.35

0.260.530.791.051.321.581.842.102.362.632.893.153.663.924.184.565.195.696.437.157.638.099.009.8810.7111.5011.8812.6013.57

0.280.550.831.111.391.661.932.212.482.763.033.303.844.114.384.785.455.976.747.497.988.479.41

10.3111.1711.9712.3513.0814.04

0.290.580.871.161.451.742.032.312.602.893.183.464.024.304.595.015.696.247.047.838.348.849.82

10.7411.6212.4412.8213.5514.50

0.310.630.951.271.581.892.212.522.833.153.463.774.384.684.995.456.186.777.638.479.019.54

10.5611.5212.4113.2113.5914.2715.12

0.340.691.031.371.722.052.392.733.073.413.744.074.745.075.395.886.687.308.229.119.68

10.2411.3012.2813.1813.9814.3514.99

0.370.741.111.481.842.212.572.943.303.664.034.395.105.455.806.317.167.838.809.74

10.3310.9112.0013.0013.8914.6715.01

0.400.791.191.581.982.362.763.153.543.924.304.695.455.826.196.747.648.349.35

10.3210.9411.5312.6413.6314.49

0.430.841.271.692.102.522.943.363.774.184.594.995.806.196.587.168.118.849.90

10.9011.5312.1413.2414.20

0.480.951.421.892.362.833.303.774.234.695.155.596.486.927.367.999.039.82

10.9512.0012.6513.2614.34

0.531.051.582.102.633.153.664.184.695.195.696.197.167.648.118.809.90

10.7411.9212.9913.6314.2215.20

0.581.161.742.312.893.464.034.595.145.696.246.777.838.348.849.58

10.7411.6212.8213.8814.4915.02

0.631.271.892.523.153.774.394.995.596.196.777.368.479.029.55

10.3211.5312.4313.6314.6415.20

Note: Shaded area indicates pulley speeds which can be used with a reduction in belt service life.


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Timing Belt Drives - Installation

10

Cross & Morse Timing Belt Drives will give excellent performance andlong life provided they are correctly installed. Pulleys must be rigidlymounted and correctly aligned, and belts installed with a snug fit nothighly tensioned. One pulley should be flanged in all drives, and bothpulleys flanged on drives with vertical shafts.

Pulley Manufacture and ReboreStandard Pulleys are manufactured to high levels of concentricity.When plain bore pulleys are re-machined it is essential thatconcentricity between bore and pulley O.D. is kept within thefollowing:-

Pulleys up to 200mm diameter - 0.10mm total run-out.

Pulleys over 200mm diameter - 0.05/100mm dia. total run-outto maximum 0.20mm.

Also the bore of the pulley must be perpendicular to side faces within0.5mm/100mm dia. total run-out to a max. of 0.5mm.In manufacture pulleys of 200mm and above diameter are staticallybalanced to levels indicated below.

This level of balancing is adequate for the majority of applications, butwhere belt speeds exceed 30 m/s pulleys will need to be furtherdynamically balanced to 1.8 x 10-3 Nm. Cast Iron pulleys must neverbe run over 30 m/s belt speed.

Installation and Alignment of PulleysClean all oil, grease and dirt from pulleys, ensuring grooves and boreare clean and free from burrs. Pulleys should be assembled onto shaftsand rigidly locked in place by taper bush or close fit bore and key onparallel bore pulleys. Alignment of shafts and pulleys is essential asmisalignment will result in unequal belt tension and edge wear. Tocheck alignment place a straight edge against the outside edges of thepulleys and position pulleys so that the straight edge touches the twooutside and two inside edges of the pulleys. Alignment of pulleysshould be confirmed after installation of belt.Check the rigidity of the supporting framework. Shafts must be wellsupported to prevent distortion with resultant changes in centredistance which will result in belt slackness causing jumping of teethunder high starting or shock load conditions.

Timing Belt InstallationTiming belts are susceptible to kinking, and should never be forced orprised on to pulleys. Reduction of centre distance or removal oftensioning idler are normal methods to enable belt fitting. For fixedcentre drives without idler the belt must be fitted to pulley prior tomounting on shafts or support bearings. To enable correct fitting wherecentres can be adjusted, the centres must be able to be reduced by thevalue in the table below under “allowance for installation” andincreased by the tensioning allowance, from the nominal centre distance.

Belt TensionTiming Belt Drives do not require as much tension as other beltdrives that depend on friction to transmit the load. The belt shouldbe installed with a snug fit, neither taut or loose. The correct level oftension can be determined by measuring the force necessary todeflect the belt an amount equal to 1/64th of its span centres ‘S’.Values for measuring forces recorded on a spring balance appliedmid-span of the belt should be as shown in the table below. Thevalue recorded for a drive should be within 10% of these values.These measurements give correct tension for most drives, but forhigh shock load applications consult Cross & Morse Engineering.

High Power Metric and Open Ended BeltsThe correct tensioning of RPP Silver and RPP Gold High Power beltsincludes consideration of transmitted power, operating speeds, andnumber of teeth in pulleys.Open ended belts are normally tensioned according to max. linearload to be transmitted, to minimise any backlash on reversing drives.Advice on correct tensioning of those belts can be supplied by Crossand Morse technical dept, as well as assistance in belt selection.

Belt StorageTo ensure correct functioning of the belts and prevent prematurefailure, belts must be protected against sharp bending or creasing.They should be stored in a cool, dry, well ventilated room withintemperature range 15-20˚C. It is preferable to keep polyurethanebelts in a darkened environment.

Use of IdlersInside or outside idlers used for tensioning or power take off shouldbe on the slack side of the belt. Inside idlers must be grooved unlessthe number of grooves is more than 40, when flat idlers can be used.Flat faced idlers must not be crowned, and all idlers should be equalto, or greater than the smallest drive pulley. Idlers must be of fixedtype, and positioned so that the arc of contact is kept to a minimum.

Pulley Face Widthmm

Up to 60 200-300301-6006

10

3M063M093M155M095M155M258M208M308M508M85

14M4014M5514M8514M11514M170

.17

.29

.54

.42

.811.461.933.055.309.205.608.00

13.0018.0027.00

6T2.56T5

10T516T525T5

16T1025T1032T1050T10XL037XL050L050L075L100H100H150H200H300

0.070.180.300.480.750.901.401.802.800.300.400.61.01.43.14.86.610.4

61-99

200-300301-600601-1000over 1000

10152030

100 and over

200-300301-600601-1000over 1000

20304060

Pulley Diametermm

Max. Unbalancegm

Belt Size F kg Belt Size F kg

Belt SizeOne Pulley Flanged Both Pulleys Flanged

TensioningAllowance

Allowance for Installation

3M5M8M14MXLLHXH

T2.5AT5 &T5

AT10 & T10

12.419.626.543.315.919.122.045.015.317.021.5

20.832.242.366.927.431.736.269.027.930.035.0

2.02.53.04.00.61.01.52.00.50.81.0

d = s/64mm

Values for Measuring Force

Std. Metric BeltsClassical and

Polyurethane Belts


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11

Metric Series Timing Belts

High Power Metric Belts (page 13)RPP Silver Belts provide increased torque and power capacity.Available 8mm (8S) and 14mm (14S) pitches, they operate onstandard metric pulleys to transmit up to 470kW. Body of thebelt is manufactured from reinforced polychloropreniccompound with exceptional resistance to flex fatigue, ozone,heat, and mineral oils. The teeth are faced with graphiteimpregnated nylon for high strength and low friction. A highmodule resistant fibre cord gives high breaking strength withreduced elasticity.

As with classical series belts, power is transmitted by a glassfibre tension member spirally wound across the width of thebelt. The glass fibre cord ensures length stability combinedwith high strength and resistance to failure under repeatedflexing. The tension member is bonded into a syntheticrubber body moulded integral with the drive teeth. Therubber compound selected has complete absence of agedeformation and high resistance to mineral lubricating oils,heat, ozone and flex fatigue. A tough nylon fabric is bondedto the drive face of the belt, which by a patented treatment isself lubricating, for low coefficient of friction with exceptionalresistance to abrasion and shear, for high drive efficiency withlong belt and pulley life.

Standard Metric Belts (pages 12)The RPP series of belts provide the ideal solution for mostdrives. Totally interchangeable with other deep profile belts,they are available in 4 pitch sizes; 3mm (3M), 5mm (5M); 8mm(8M), and 14mm (14M). Standard drives are suitable forapplications from fractional kW up to 250kW power rating.In order to transmit higher powers tooth contact between beltand pulley has to be increased. To achieve this a parabolictooth form with contact angle increasing from tooth base totip was adopted, enabling a deeper tooth form than classicalbelts. The improved level of meshing, combined withsmoother engagement of drive, increased resistance to toothshear and tooth jumping enabled higher torque transmissionwith reduced installation tension. Belts have an indentation atthe top of the tooth to further improve meshing between beltand pulley by deformation of the tooth tip allowing precisemoulding of tooth to pulley contours, reducing frictional wear.The indentation also allows air to escape, further reducingnoise levels.

Standard High Torque Metric Timing Belt DrivesTo provide optimum performance with a standard range ofMetric High Torque Drive Pulleys, Cross & Morse selected.RPP series belts.The RPP belts are, combined with a standard range of pulleyto provide “off the shelf” drives in 4 pitches; 3mm (3M) 5mm(5M), 8mm (8M), and 14mm (14M), able to transmit up to700kW, or drive shafts to 15,000 r.p.m.

The pulleys are available with 2 methods of shaft connection;Pilot bored, pages 17-20, for finishing with sized bore, keywayand setscrews can, optionally be supplied finished; taperbored for fitting standard taper bushes page 25.

For even higher powered drives, up to 700kW, the Pantherseries belts, were developed in 8mm (8G) and 14mm (14G)pitches. These use Aramid reinforced polychloroprene for thebody of the belt with double layer graphite impregnatednylon facing for the teeth. The tension cables are in Kevlar formaximum strength with flexibility. The belts provide all theadvantages of RPP Silver with additional load capacity,excellent anti-static properties, and ability to use idlers on theback of the belt.

Anti Static BeltsBelts conforming to BS2050 standards can be supplied for the8M and 14M belt sizes. These belts are for appliction within chemical plants, oil refineries, and in mines.

The RPP Silver & RPP Gold high power belts have anti-staticproperties as standard.

Double sided Belts (page 15)To enable power to be taken from both sides of the belt totransfer direction of drive. Available in 5M and 14M toothform to operate on standard Metric pulleys.

These belts have moulded teeth on both sides with nylonjacket, to enable full torque transmission. Ideal for Serpentinedrives, and multi shaft arrangements.

‘TIL’ Long length BeltsSpecial manufacturing method enables extra long lengthendless belts to be manufactured.

Ideal for long centre distance drives where full torquetransmission is required.

Open Ended Metric Belts (pages 26-28)Long length (up to 150 Metres) open ended belts are availablein both standard neoprene rubber costruction, and inPolyurethane with RPP tooth form.For increased Power capacity the “Green Belt” is available asan alternate/replacement, these being Polyurethane beltsmanufactured to tight tolerance with standard RPP toothprofile for maximum power transmission.

The teeth are faced with green nylon fabric giving reducednoise and friction. High strength steel tension member giveshigh breaking strengths with extremely low elongation. Thebelts are available in 5mm, 8mm, and 14mm pitch for lineardrive applications, and are particularly suitable in drives withfrequent speed change.


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535565575580600610615635640670675700705710725740750755800835850890900935940

BeltLength

mmNo.

Teeth

9mm Wide Belt 15mm Wide Belt 25mm Wide Belt

Cat. No. Cat. No. Cat. No.

535-5M9565-5M9575-5M9580-5M9600-5M9610-5M9615-5M9635-5M9640-5M9670-5M9675-5M9700-5M9705-5M9710-5M9725-5M9740-5M9750-5M9755-5M9800-5M9835-5M9850-5M9890-5M9900-5M9935-5M9940-5M9

107113115116120122123127128134135140141142145148150151160167170178180187188

22242424252626272728282930303031313234353637383939


37404041424343444547474949505152525356586062636566


636667687071727475787982828385878788949899104106109110

Wtgms

Wtgms

Wtgms

90-3M15105-3M15129-3M15141-3M15144-3M15147-3M15150-3M15159-3M15168-3M15174-3M15177-3M15180-3M15186-3M15195-3M15201-3M15204-3M15210-3M15213-3M15225-3M15231-3M15240-3M15243-3M15246-3M15252-3M15255-3M15261-3M15264-3M15267-3M15270-3M15

89

1010111111121213131414151617181819191920202122

Metric Series Timing Belts

5mm Pitch Standard Metric Belts Type 5MBelt

Lengthmm

No.Teeth



180225235245255265270285295300305325345350375400420425450455460465475500525

3645474951535457596061656970758084859091929395100105


13161617181919202121212324252628293032323233333537




Lengthmm

No.Teeth


Cat. No. Wt gms Cat. No. Cat. No.

90105129141144147150159168174177180186195201204210213225231240243246252255261264267270

3035434748495053565859606265676870717577808182848587888990

22333333344444444455555555566


33444555555666666777788888888

557778889999

1010101111111212121313131313141414


Wt gms

Wt gms

Wtgms

Wtgms

510-3M15513-3M15522-3M15531-3M15537-3M15564-3M15570-3M15576-3M15579-3M15597-3M15600-3M15633-3M15648-3M15669-3M15711-3M15735-3M15738-3M15756-3M15804-3M15882-3M15945-3M15

1062-3M151125-3M151245-3M151263-3M151500-3M151530-3M151863-3M15

No.Teeth



510513522531537564570576579597600633648669711735738756804882945

1062112512451263150015301863

170171174177179188190192193199200211216223237245246252268294315354375415421500510621

11111111111212121212121313141515151617181922232626313238


1062-3M61125-3M61245-3M61263-3M61500-3M61530-3M61863-3M6

16161616171718181818192020212223232325272933353839464758

26262727282929303031313333343738383941454955586465777996

Wt gms

Wt gms


1062-3M91125-3M91245-3M91263-3M91500-3M91530-3M91863-3M9

BeltLength

mm

BeltLength

mmNo.

Teeth



276285288291297300312318327330336339345357363375384390393405420432447474480486489501

9295969799

100104106109110112113115119121125128130131135140144149158160162163167

666666677777777888889991010101010

276-3M6285-3M6288-3M6291-3M6297-3M6300-3M6312-3M6318-3M6327-3M6330-3M6336-3M6339-3M6345-3M6357-3M6363-3M6375-3M6384-3M6390-3M6393-3M6405-3M6420-3M6432-3M6447-3M6474-3M6480-3M6486-3M6489-3M6501-3M6

99999910101010101011111112121212131313141515151515

14151515151516161717171718181919202020212222232425252526

Wt gms

Wt gms



25mm Wide BeltNo.Teeth

9mm Wide Belt 15mm Wide Belt


950-5M9980-5M9


190196200205210220225227239240248254284319338358360374379389400450505

40414243444647485050525360674175767980828495

106

950-5M15980-5M15


67697072747779798484878999

112118125126131133136140158177

950-5M25980-5M25


111115117120123129132133140140145149166187198209211219222228234263295

Wtgms

Wtgms

Wtgms

950980

100010251050110011251135119512001240127014201595169017901800187018951945200022502525

BeltLength

mmWtgms

21262729303132333535363840414447495053535454565961

12


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Lengthmm

No.Teeth


Cat. No. Wt kg Cat. No. Wt kg Cat. No. Wt kg

288320352360384408456480536544560600608632640680720800840880896920960

288-8M20320-8M20352-8M20360-8M20384-8M20408-8M20456-8M20480-8M20536-8M20544-8M20560-8M20600-8M20608-8M20632-8M20640-8M20680-8M20720-8M20800-8M20840-8M20880-8M20896-8M20920-8M20960-8M20

3640444548515760676870757679808590

100105110112115120

0.0330.0360.0400.0410.0430.0460.0520.0540.0610.0610.0630.0680.0690.0710.0720.0770.0810.0900.0950.0990.1010.1040.108


0.0490.0540.0600.0610.0650.0690.0770.0810.0910.0920.0950.1020.1030.1070.1080.1150.1220.1360.1420.1490.1520.1560.163


0.0810.0900.0990.1020.1080.1150.1290.1360.1510.1540.1580.1700.1720.1790.1810.1920.2030.2260.2370.2490.2530.2600.271


0.1380.1540.1690.1730.1840.1960.2190.2310.2570.2610.2690.2880.2920.3040.3070.3270.3460.3840.4030.4230.4300.4420.461

85mm Wide Belt

Cat. No. Wt kg

BeltLength

mmNo.

Teeth



10001040108011201200122412801352144014641600176018002000220024002520260028003048328036004400


125130135140150153160169180183200220225250275300315325350381410450550

0.1130.1180.1220.1270.1360.1380.1450.1530.1630.1650.1810.1990.2030.2260.2490.2710.2850.2940.3160.3440.3710.4070.497


0.1700.1760.1830.1900.2030.2070.2170.2290.2440.2480.2710.2960.3050.3390.3730.4070.4270.4410.4750.5170.5560.6100.746


0.2830.2940.3050.3160.3390.3460.3620.3820.4070.4140.4520.4970.5090.5650.6220.6780.7120.7350.7910.8610.9271.0171.243


0.4800.4990.5190.5380.5760.5880.6150.6490.6920.7030.7680.8450.8640.9611.0571.1531.2101.2491.3451.4641.5751.7292.113

85mm Wide Belt

Cat. No. Wt kg

10001040108011201200122412801352144014641600176018002000220024002520260028003048328036004400

288320352360384408456480536544560600608632640680720800840880896920960

8mm Pitch RPP Silver High Power Belts Type 8SBelt

Lengthmm

No.Teeth

20mm Wide Belt

Cat. No. Wt kg

30mm Wide Belt

Cat. No. Wt kg

50mm Wide Belt

Cat. No. Wt kg

85mm Wide Belt

Cat. No. Wt kg

288-8S20320-8S20352-8S20360-8S20384-8S20408-8S20456-8S20480-8S20536-8S20544-8S20560-8S20600-8S20608-8S20632-8S20640-8S20680-8S20720-8S20800-8S20840-8S20880-8S20896-8S20920-8S20960-8S20

3640444548515760676870757679808590

100105110112115120

0.0330.0360.0400.0410.0430.0460.0520.0540.0610.0610.0630.0680.0690.0710.0720.0770.0810.0900.0950.0990.1010.1040.108


0.0490.0540.0600.0610.0650.0690.0770.0810.0910.0920.0950.1020.1030.1070.1080.1150.1220.1360.1420.1490.1520.1560.163


0.0810.0900.0990.1020.1080.1150.1290.1360.1510.1540.1580.1700.1720.1790.1810.1920.2030.2260.2370.2490.2530.2600.271


0.1360.1540.1690.1730.1840.1960.2190.2310.2570.2610.2690.2880.2920.3040.3070.3270.3460.3840.4030.4230.4300.4420.461

BeltLength

mmNo.

Teeth20mm Wide Belt

Cat. No. Wt kg

30mm Wide Belt

Cat. No. Wt kg

50mm Wide Belt

Cat. No. Wt kg

85mm Wide Belt

Cat. No. Wt kg


125130135140150153160169180183200220225250275300315325350381410450550

0.1130.1180.1220.1270.1360.1380.1450.1530.1630.1650.1810.1990.2030.2260.2490.2710.2850.2940.3160.3440.3710.4070.497


0.1700.1760.1830.1900.2030.2070.2170.2290.2440.2480.2710.2980.3050.3390.3730.4070.4270.4410.4750.5170.5560.6100.746


0.2830.2940.3050.3160.3390.3460.3620.3820.4070.4140.4520.4970.5090.5650.6220.6780.7120.7350.7910.8610.9271.0171.243


0.4800.4990.5190.5380.5760.5880.6150.6490.6920.7030.7680.8450.8640.9611.0571.1531.2101.2491.3451.4641.5751.7292.113

13

288320352360384408456480536544560600608632640680720800840880896920960

288-8G20320-8G20352-8G20360-8G20384-8G20408-8G20456-8G20480-8G20536-8G20544-8G20560-8G20600-8G20608-8G20632-8G20640-8G20680-8G20720-8G20800-8G20840-8G20880-8G20896-8G20920-8G20960-8G20

3640444548515760676870757679808590

100105110112115120

0.0330.0360.0400.0410.0430.0460.0520.0540.0610.0610.0630.0680.0690.0710.0720.0770.0810.0900.0950.0990.1010.1040.108


0.0490.0540.0600.0610.0650.0690.0770.0810.0910.0920.0950.1020.1030.1070.1080.1150.1220.1360.1420.1490.1520.1560.163


0.0810.0900.0990.1020.1080.1150.1290.1360.1510.1540.1580.1700.1720.1790.1810.1920.2030.2260.2370.2490.2530.2600.271


0.1380.1540.1690.1730.1840.1960.2190.2310.2570.2610.2690.2880.2920.3040.3070.3270.3460.3840.4030.4230.4300.4420.461

10001040108011201200122412801352144014641600176018002000220024002520260028003048328036004400

8mm Pitch Gold High Power Belts Type 8GBelt

Lengthmm

No.Teeth

20mm Wide Belt

Cat. No. Wt kg

30mm Wide Belt

Cat. No. Wt kg

50mm Wide Belt

Cat. No. Wt kg

85mm Wide Belt

Cat. No. Wt kg

BeltLength

mmNo.

Teeth20mm Wide Belt

Cat. No. Wt kg

30mm Wide Belt

Cat. No. Wt kg

50mm Wide Belt

Cat. No. Wt kg

85mm Wide Belt

Cat. No. Wt kg


125130135140150153160169180183200220225250275300315325350381410450550

0.1130.1180.1220.1270.1360.1380.1450.1530.1630.1650.1810.1990.2030.2260.2490.2710.2850.2940.3160.3440.3710.4070.497


0.1700.1760.1830.1900.2030.2070.2170.2290.2440.2480.2710.2980.3050.3390.3730.4070.4270.4410.4750.5170.5560.6100.746


0.2830.2940.3050.3160.3390.3460.3620.3820.4070.4140.4520.4970.5090.5650.6220.6780.7120.7350.7910.8610.9271.0171.243


0.4800.4990.5190.5380.5760.5880.6150.6490.6920.7030.7680.8450.8640.9611.0571.1531.2101.2491.3451.4641.5751.7292.113

High Power RPP Silver and RPP Gold BeltsThe improved design RPP Silver and RPP Gold Belts cantransmit higher torques whilst still operating on standard HTDpulleys. Replacing a standard metric belt with the equivalentRPP belt can enable up to 100% more torque transmission,whilst the equivalent RPP Gold belt provides up to 200% more.


INDEX BACK NEXT

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14


Lengthmm

No.Teeth



966994

10921106119012601288134414001442156816101764177818481890190419602100224023102380245025902660280031503360350038503920432645784956

966-14M40994-14M40

1092-14M401106-14M401190-14M401260-14M401288-14M401344-14M401400-14M401442-14M401568-14M401610-14M401764-14M401778-14M401848-14M401890-14M401904-14M401960-14M402100-14M402240-14M402310-14M402380-14M402450-14M402590-14M402660-14M402800-14M403150-14M403360-14M403500-14M403850-14M403920-14M404326-14M404578-14M404956-14M40

6971787985909296

100103112115126127132135136140150160165170175185190200225240250275280309327354

0.380.390.430.440.470.500.510.530.550.570.620.630.700.700.730.740.750.770.830.880.910.940.971.021.051.101.241.321.381.521.541.701.801.95

966-14M55994-14M55


0.520.540.590.600.640.680.700.730.760.780.850.870.960.961.001.021.031.061.141.211.251.291.331.401.441.521.711.821.902.092.122.342.482.68

966-14M85994-14M85


0.810.830.910.931.001.051.081.131.171.211.311.351.481.491.551.581.591.641.761.881.931.992.052.172.232.342.642.812.933.223.283.623.834.15

966-14M115994-14M115


1.091.131.241.251.351.431.461.521.591.631.781.822.002.012.092.142.162.222.382.542.622.702.782.933.013.173.573.813.964.364.444.905.195.61

966-14M170994-14M170


1.621.661.831.851.992.112.162.252.342.412.632.702.952.983.093.163.193.283.523.753.873.994.104.344.454.695.275.635.866.456.567.247.678.30


Cat. No. Wt kg Cat. No. Wt kg

1.091.131.241.251.351.431.461.521.591.631.781.822.002.012.092.142.162.222.382.542.622.702.782.933.013.173.573.813.964.364.444.905.195.61

966994

10921106119012601288134414001442156816101764177818481890190419602100224023102380245025902660280031503360350038503920432645784956

14mm Pitch RPP Silver High Power Belts Type 14SBelt

Lengthmm

No.Teeth

40mm Wide Belt

Cat. No. Wt kg

55mm Wide Belt

Cat. No. Wt kg

85mm Wide Belt

Cat. No. Wt kg


Cat. No. Wt kg

966-14S40994-14S40

1092-14S401106-14S401190-14S401260-14S401288-14S401344-14S401400-14S401442-14S401568-14S401610-14S401764-14S401778-14S401848-14S401890-14S401904-14S401960-14S402100-14S402240-14S402310-14S402380-14S402450-14S402590-14S402660-14S402800-14S403150-14S403360-14S403500-14S403850-14S403920-14S404326-14S404578-14S404956-14S40

6971787985909296

100103112115126127132135136140150160165170175185190200225240250275280309327354

0.380.390.430.440.470.500.510.530.550.570.620.630.700.700.730.740.750.770.830.880.910.940.971.021.051.101.241.321.381.521.541.701.801.95

966-14S55994-14S55

1092-14S551106-14S551190-14S551260-14S551288-14S551344-14S551400-14S551442-14S551568-14S551610-14S551764-14S551778-14S551848-14S551890-14S551904-14S551960-14S552100-14S552240-14S552310-14S552380-14S552450-14S552590-14S552660-14S552800-14S553150-14S553360-14S553500-14S553850-14S553920-14S554326-14S554578-14S554956-14S55

0.520.540.590.600.640.680.700.730.760.780.850.870.960.961.001.021.031.061.141.211.251.291.331.401.441.521.711.821.902.092.122.342.482.68

966-14S85994-14S85

1092-14S851106-14S851190-14S851260-14S851288-14S851344-14S851400-14S851442-14S851568-14S851610-14S851764-14S851778-14S851848-14S851890-14S851904-14S851960-14S852100-14S852240-14S852310-14S852380-14S852450-14S852590-14

Timing Belt Catalogue - OPIS Belt Online Catalogue... · 2013. 10. 24. · Timing Belts Index...

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Transcript of Timing Belt Catalogue - OPIS Belt Online Catalogue... · 2013. 10. 24. · Timing Belts Index...