By developing special BG bearing series, NACHI has surpassed the needs and demandsin the air conditioning market. Through these accomplishments NACHI has gained

recognition and increased market share around the world.

Best Components support Bearing PerformanceSelected Ring Material

Optimum Heat Treatment for A/CWell Controlled Accuracy, Roundness and Surface Finish

Special Design Glass Reinforced Polyamide Cage

Advanced Seal Design High-performance GreaseExcellent Grease Retention Specially Blended Oil, Thickener and AdditivesSuperb Dust / Water Proof Durability in High Temperature

Light Rotating Torque Smooth and Quiet RotationHigh Temperature Resistance

BG Type

for Car Air Conditioning Magnetic ClutchDouble-row Angular Contact Ball Bearings

Best Components support Bearing Performance

High-performance GreaseAdvanced Seal Design

Selected Ring MaterialOptimum Heat Treatment for A/C

Well Controlled Accuracy, Roundness and Surface FinishSpecial Design Glass Reinforced Polyamide Cage

Excellent Grease RetentionSuperb Dust / Water Proof

Light Rotating TorqueHigh Temperature Resistance

Specially Blended Oil, Thickener and AdditivesDurability in High Temperature

Smooth and Quiet Rotation

Comparison Test ResultsNACHI vs. Chinese brand popular in Texas

Tested Bearing : 30BG05S5G-2DS (φ30 x φ55 x 23 mm)

Dimensions

Note : Chinese brand bearing ;- Seals rotate with inner ring in seal groove even before test.- Conventional mineral oil grease is used.- Excessive amount of leaked grease that may cause clutch

engagement problem was observed in pulley after the tests.

BEARING DIV. HEADQUARTERS715 Pushville RoadGreenwood, Indiana 46143Phone: 888-340-2747 Fax: 888-734-1206

ENGINEERING LABORATORYNachi Technical Center715 Pushville RoadGreenwood, IN 46143Phone: 317-530-1008

NACHI AMERICA, INC. Corporate Headquarters 715 Pushville Road Greenwood, Indiana 46143 Phone: 317-530-1001 Fax: 317-530-1011

NACHI MEXICANA Tequisquiapan 2, Aerotech Industrial Park,Colón, Querétaro, 75295Tel: 442 153 2424-27www.nachi.com.mx

Fax: 317-530-1012 August 2020

Technical Information

Offices

CATALOG NO : NMX-IV-08-2020

0

100

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300

400

500

600

0

5

10

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25

30

35

40

Dur

abili

ty

Gre

ase

Leak

age

%

hours

Chinese Brand

Test ConditionsSpeed :

Radial Load :Off-set :

.Temperature:(Ambient)Duration :

7,000 rpm Outer Ring Rotation 1,470 N (330 lbf) 0 mm 120 oC (248 oF)

20 hours

1/4 to 1/3 of grease leaked fromChinese brand bearings in 20 hours .

Test ConditionsSpeed :

Radial Load :Off-set :

.Temperature:(Inner Ring)

12,000 rpm Outer Ring Rotation 2,255 N (507 lbf) 0 mm 160 oC (320 oF)

NACHI bearingsshowed 10 timeslonger B10 Life.

Unit : mm

BEARING NO. BORE O.D. WIDTH

30BG04S21G-2DST 30 47 20

30BG04S13-2DST2 30 47 22

30BGS32G-2DST 30 52 20

30BG5222-2DSE 30 52 22

30BG05S5G-2DS 30 55 23

30BGS1G-2DSKAI 30 62 27

32BG05S1-2DST 32 55 23

35BG05S7G-2DL 35 50 20

35BG5220-2DL 35 52 20

35BG5222-2DL 35 52 22

35BG05S16G-2DL2F 35 55 20

35BG5522-2DL2 35 55 22

35BG06G-2DS 35 62 21

38BG05S6G-2DST2F 38 54 17

40BG5720-2DS 40 57 20

40BG05S2G-2DS 40 57 24

40BG62020-2DL 40 62 20.625

40BGS12G-2DS 40 62 20.637/24

40BGS11G-2NSL

40BGS36G-2DST2F

40BGS39G-2DL 40 66 24

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