| Old No. | R-4 | ![]() Open | |
| Dimensions (metric) | d | 4 | |
| D | 16 | ||
| B | 5 | ||
| Approx. Wgt. lbs | .0120 | ||
| Interchange | ADR | 634 | |
| ISC | 634 | ||
| Nachi | 634 | ||
| NMB | R-1640 | ||
| NTN | 634 | ||
| RMB | R4160 | ||
| SKF | 634 | ||
| 1) Also available in ABEC #3, #5 and #7 precision. Consult factory for availability. | |||
Hot number:KOYO 51408 SKF NNU 4944/W33 OKB 266210KL ISO 22228 KW33 CX 4306-2RS ISO 683XA/672 Gamet 80030/80068P NTN FL624 ISO NUP1021 KOYO SDE25AJ Aetna FT-26 FAG NUP-344 SKF HK 1214 RS BARDEN 234776M.SP TORRINGTON FAFNIR 6311-2Z
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