d - 4 mm

D - 10 mm

B - 4 mm

C - 4 mm

d1 - 5,9 mm

d2 - – mm

r1 min. - 5,6 mm

r2 min. - 5,6 mm

D1 - 8,8 mm

D2 - 0,2 mm

da min. - 5,8 mm

Da max. - 8,8 mm

ra max. - 0,2 mm

Weight - 0,0013 Kg

Basic dynamic load rating (C) - 0,637 kN

Basic static load rating (C0) - 0,25 kN

Fatigue load limit (Pu) - 0,011

Reference speed - 130000 r/min

Limiting speed - 63000 r/min

Calculation factor (f0) - 12

Calculation factor (kr) - 0,02

• Model Number:W638/4X-2Z
• Inner Diameter：4mm Outer Diameter：10mm Width：4mm
• Type：Deep Groove Ball Bearings
• Update date：2025-12-12
• Application:electric pump,Ball screw,wheel lathe,electronic components,instrumentation instrument,switch,crimping tools,Spectrum Products,embroidery cloth,agriculture,garbage disposal
• Similar models:SKF W63805-2RS1 SKF 638/8-2Z CX 63802 SKF W63803-2RS1 SKF W63804-2Z SKF W63801R-2Z SKF W63805R ISB F63801 ISB SS638/2-ZZ ISB F63802
• BEARING POWER International Trading Co.,Ltd. specialize in W638/4X-2Z products，there is large inventory of SKF W638/4X-2Z . We has been built up long-term cooperation with SKF company, could make a bulk order of the W638/4X-2Z Which SKF W638/4X-2Z 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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