d - 8 mm

D - 28 mm

B - 9 mm

d₂ - - 13.9 mm

D₂ - - 22.38 mm

r_1,2 - min. - 0.3 mm

d_a - min. - 10 mm

d_a - max. - 13.8 mm

D_a - max. - 26 mm

r_a - max. - 0.3 mm

Basic dynamic load rating - C - 4 kN

Basic static load rating - C₀ - 2 kN

Fatigue load limit - P_u - 0.083 kN

Reference speed - 67000 r/min

Limiting speed - 32000 r/min

Calculation factor - k_r - 0.035

Calculation factor - f₀ - 12.4

Mass bearing - 0.0285 kg

• Model Number:W 638-2Z
• Inner Diameter：28mm Outer Diameter：8mm Width：9mm
• Type：Deep Groove Ball Bearings
• Update date：2025-12-12
• Application:Food testing,CNC,ECG,roller lathe,hydraulic actuator,Logistics Equipment,die casting mold,Tool,directional control valve,Hydraulic Rama,ventilation equipment
• Similar models:SKF W638/4R-2Z SKF W638/8-2Z ISO 63800-2RS ZEN 638-2RS SKF W638/2.5R-2Z SKF W63800R-2RS1 KBC 638ZZ ISO 638 NTN 638Z CX 63800
• BEARING POWER International Trading Co.,Ltd. specialize in W638-2Z products，there is large inventory of SKF W 638-2Z . We has been built up long-term cooperation with SKF company, could make a bulk order of the W 638-2Z Which SKF W638-2Z 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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