d - 4 mm

D - 9 mm

B - 4 mm

C - 4 mm

d1 - 5,2 mm

d2 - – mm

r1 min. - 4,8 mm

r2 min. - 4,8 mm

D1 - 8,1 mm

D2 - 0,1 mm

da min. - 5,1 mm

Da max. - 8,2 mm

ra max. - 0,1 mm

Weight - 0,001 Kg

Basic dynamic load rating (C) - 0,364 kN

Basic static load rating (C0) - 0,114 kN

Fatigue load limit (Pu) - 0,005

Reference speed - – r/min

Limiting speed - 40000 r/min

Calculation factor (f0) - 6,5

Calculation factor (kr) - 0,02

• Model Number:W638/4-2RS1
• Inner Diameter：4mm Outer Diameter：9mm Width：4mm
• Type：Deep Groove Ball Bearings
• Update date：2025-12-12
• Application:scientific instruments,electric pump,Broadcasting System,security equipment,agrochemical,pneumatic Pump,laser devices,walking Food processing machinery and equipment,electromagnetic clutch,floor industry,paint paint
• Similar models:ISB F63803 ISB 638/8-ZZ CYSD 1638-RS KOYO 638-2RD ISB 63800ZZ SKF W63802-2Z ZEN 63801 ISB SS638/3-ZZ SKF W63802R ZEN 638-2RS
• BEARING POWER International Trading Co.,Ltd. specialize in W638/4-2RS1 products，there is large inventory of SKF W638/4-2RS1 . We has been built up long-term cooperation with SKF company, could make a bulk order of the W638/4-2RS1 Which SKF W638/4-2RS1 is the most authentic, must choose BEARING POWER, what a whole variety, reasonable price, guaranteed quality, prompt delivery via Global express.Any inquiry, never hesitate to E-mail or call +86-022-58519721 to contact us.

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