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| Bearing Designation | Boundary Dimensions | |||
| Current | Original Code | Fw | D | C |
| mm | ||||
| Without IR | ||||
| NK30×50×17 | 30 | 50 | 17 | |
| NK30×51×17 | 30 | 51 | 17 | |
| RNA4904 | 4644904 | 25 | 37 | 17 |
| RNA4906 | 4644906 | 35 | 47 | 17 |
| RNA4910 | 4644910 | 58 | 72 | 22 |
| RNAV4004 | 4084104 | 28.7 | 42 | 22 |
| RNAV4007 | 4084107 | 45.9 | 62 | 27 |
| RNAV4908 | 4084908K | 48 | 62 | 22 |
| With IR | ||||
| NK138/20 | 38 | 53 | 20 | |
| NA4906 | 4544904 | 30 | 47 | 14 |
| NA4917 | 4544917 | 85 | 120 | 35 |
| NAV4006 | 4074106 | 30 | 55 | 25 |
| NAV4910 | 4074910 | 50 | 72 | 22 |
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Tel: 0510-8279 1931
Email: sales15@wd-bearing.com
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Email: japan1@wd-bearing.com