| Bearing model | Boundary Dimensions（mm） | Speed Rating(ipm) | Load Rating （kn） | Bearing type | ||||
|---|---|---|---|---|---|---|---|---|
| d | D | B | Grease lubrication | Oil lubrication | Dynamic Cr | Static Cor | ||
| W 638/5 R-2RS1 | 5 | 11 | 5 | 0.403 | 0.143 | 34000 | Deep groove ball bearing | |
| W 638/5 R-2Z | 5 | 11 | 5 | 0.403 | 0.143 | 120000 | 60000 | Deep groove ball bearing |
| W 638/5-2RS1 | 5 | 11 | 5 | 0.403 | 0.143 | 34000 | Deep groove ball bearing | |
| W 638/5-2RZ | 5 | 11 | 5 | 0.403 | 0.143 | 120000 | 60000 | Deep groove ball bearing |
| W 638/5-2Z | 5 | 11 | 5 | 0.403 | 0.143 | 120000 | 60000 | Deep groove ball bearing |
| W 638/8 R-2Z | 8 | 16 | 6 | 0.715 | 0.3 | 90000 | 45000 | Deep groove ball bearing |
| W 638/8-2Z | 8 | 16 | 6 | 0.715 | 0.3 | 90000 | 45000 | Deep groove ball bearing |
| W 638/9-2Z | 9 | 17 | 6 | 0.761 | 0.335 | 85000 | 43000 | Deep groove ball bearing |
| W 63800 | 10 | 19 | 7 | 1.48 | 0.83 | 80000 | 48000 | Deep groove ball bearing |
| W 63800 R | 10 | 19 | 7 | 1.48 | 0.83 | 80000 | 48000 | Deep groove ball bearing |
| W 63800 R-2RS1 | 10 | 19 | 7 | 1.48 | 0.83 | 22000 | Deep groove ball bearing | |
| W 63800 R-2Z | 10 | 19 | 7 | 1.48 | 0.83 | 80000 | 38000 | Deep groove ball bearing |
| W 63800-2RS1 | 10 | 19 | 7 | 1.48 | 0.83 | 22000 | Deep groove ball bearing | |
| W 63800-2RZ | 10 | 19 | 7 | 1.48 | 0.83 | 80000 | 38000 | Deep groove ball bearing |
| W 63800-2Z | 10 | 19 | 7 | 1.48 | 0.83 | 80000 | 38000 | Deep groove ball bearing |
| W 63801 | 12 | 21 | 7 | 1.51 | 0.9 | 70000 | 43000 | Deep groove ball bearing |
| W 63801 R | 12 | 21 | 7 | 1.51 | 0.9 | 70000 | 43000 | Deep groove ball bearing |
| W 63801 R-2Z | 12 | 21 | 7 | 1.51 | 0.9 | 70000 | 36000 | Deep groove ball bearing |
| W 63801-2RS1 | 12 | 21 | 7 | 1.51 | 0.9 | 20000 | Deep groove ball bearing | |
| W 63801-2RZ | 12 | 21 | 7 | 1.51 | 0.9 | 70000 | 36000 | Deep groove ball bearing |
| W 63801-2Z | 12 | 21 | 7 | 1.51 | 0.9 | 70000 | 36000 | Deep groove ball bearing |
| W 63802 | 15 | 24 | 7 | 1.65 | 1.08 | 60000 | 38000 | Deep groove ball bearing |
| W 63802 R | 15 | 24 | 7 | 1.65 | 1.08 | 60000 | 38000 | Deep groove ball bearing |
| W 63802 R-2Z | 15 | 24 | 7 | 1.65 | 1.08 | 60000 | 30000 | Deep groove ball bearing |
| W 63802-2RS1 | 15 | 24 | 7 | 1.65 | 1.08 | 17000 | Deep groove ball bearing | |
| W 63802-2RZ | 15 | 24 | 7 | 1.65 | 1.08 | 60000 | 30000 | Deep groove ball bearing |
| W 63802-2Z | 15 | 24 | 7 | 1.65 | 1.08 | 60000 | 30000 | Deep groove ball bearing |
| W 63803 | 17 | 26 | 7 | 1.78 | 1.27 | 56000 | 34000 | Deep groove ball bearing |
| W 63803 R | 17 | 26 | 7 | 1.78 | 1.27 | 56000 | 34000 | Deep groove ball bearing |
| W 63803 R-2Z | 17 | 26 | 7 | 1.78 | 1.27 | 56000 | 28000 | Deep groove ball bearing |
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