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  Deep groove ball bearings

Part Number

d - Bore

D - Outer Diameter

B - Width

Cr - Dynamic Radial Rating

Cor - Static Radial Rating

Reference speed

Limiting speed

W 637/8 R-2Z 8 mm 12 mm 3.5 mm 0.312 N 0.14 N 100000 rpm 53000 rpm
W 637/5 XR-2ZS 5 mm 9 mm 3 mm 0.247 N 0.085 N 130000 rpm 67000 rpm
W 637/5 XR-2Z 5 mm 9 mm 3 mm 0.247 N 0.085 N 130000 rpm 67000 rpm
W 637/5 X-2ZS 5 mm 9 mm 3 mm 0.247 N 0.085 N 130000 rpm 67000 rpm
W 637/5 X-2Z 5 mm 9 mm 3 mm 0.247 N 0.085 N 130000 rpm 67000 rpm
W 637/4 XR-2Z 4 mm 8 mm 3 mm 0.225 N 0.072 N 150000 rpm 75000 rpm
W 637/4 XR 4 mm 10 mm 3 mm 0.553 N 0.245 N 130000 rpm 80000 rpm
W 637/4 X-2Z 4 mm 8 mm 3 mm 0.225 N 0.072 N 150000 rpm 75000 rpm
W 637/4 X 4 mm 10 mm 3 mm 0.553 N 0.245 N 130000 rpm 80000 rpm
W 637/2-2Z 2 mm 4 mm 2 mm 0.068 N 0.019 N 200000 rpm 100000 rpm
W 637 7 mm 26 mm 9 mm 3.97 N 1.96 N 67000 rpm 40000 rpm
W 636-2Z 6 mm 22 mm 7 mm 1.99 N 0.78 N 75000 rpm 38000 rpm
W 636-2RZ 6 mm 22 mm 7 mm 1.99 N 0.78 N 75000 rpm 38000 rpm
W 636-2RS1 6 mm 22 mm 7 mm 1.99 N 0.78 N - 22000 rpm
W 636 6 mm 22 mm 7 mm 1.99 N 0.78 N 75000 rpm 48000 rpm
W 635-2Z 5 mm 19 mm 6 mm 2.03 N 0.88 N 85000 rpm 43000 rpm
W 635-2RZ 5 mm 19 mm 6 mm 2.03 N 0.88 N 85000 rpm 43000 rpm
W 635-2RS1 5 mm 19 mm 6 mm 2.03 N 0.88 N - 24000 rpm
W 635 R-2Z 5 mm 19 mm 6 mm 2.03 N 0.88 N 85000 rpm 43000 rpm
W 635 R-2RS1 5 mm 19 mm 6 mm 2.03 N 0.88 N - 24000 rpm