| Dimensions (metric) | d | 4 | ![]() Open |
| D | 9 | ||
| B | 2.5 | ||
| Approx. Wgt. lbs | .0020 | ||
| Interchange | ADR | - | |
| ISC | 684h | ||
| NMB | SSL-840 | ||
| NTN | F684 | ||
| RMB | - | ||
| SKF | W618/4 | ||
| 1) Outer races, inner races and balls are manufactured from 440C or equivalent stainless steel. They are through hardened to a hardness of 55-57RC. 2) The cages are manufactured from 304 or equivalent stainless steel. | |||
Hot number:INA SL18 2988 OKB KS141817 Timken 14FSH30 NACHI 7322DB SKF GE45ES-2LS KOYO JT-1613 KOYO MLF4008 NTN T-HM237545/HM237513 FAG SA0055 AST SCE44 New Departure 308-ZZNR FAG 71802TGP/4 McGill NATR-10-X NOK TB 330 390 28 NBR NOK ISI 65 55 6 標準
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