76 models in the 644 series, 71.438–114.976 mm bore. Every row links to the full specification page and to the cross-reference page of that model.
| Model | Brand | Bore d (mm) | OD D (mm) | Width B (mm) | |
|---|---|---|---|---|---|
| 644 - 632 | TIMKEN | — | |||
| 644 - 632-B | TIMKEN | — | |||
| 644 - 632A | TIMKEN | — | |||
| 644 - 632D | TIMKEN | — | |||
| 644 - 632DC | TIMKEN | — | |||
| 644 - 633 | TIMKEN | — | |||
| 644 - 634W | TIMKEN | — | |||
| 64432 | TIMKEN | — | |||
| 64432 - 64700 | TIMKEN | — | |||
| 64432 - 64700D | TIMKEN | — | |||
| 64432 - 64700DC | TIMKEN | — | |||
| 64432 - 64701X | TIMKEN | — | |||
| 64432 - 64708 | TIMKEN | Cross-ref → | |||
| 64432 - 64713 | TIMKEN | — | |||
| 64433 | TIMKEN | — | |||
| 64433 - 64700 | TIMKEN | — | |||
| 64433 - 64700-B | TIMKEN | — | |||
| 64433 - 64700D | TIMKEN | — | |||
| 64433 - 64700DC | TIMKEN | — | |||
| 64433 - 64701X | TIMKEN | — | |||
| 64433 - 64708 | TIMKEN | — | |||
| 64433 - 64713 | TIMKEN | — | |||
| 64437 | TIMKEN | — | |||
| 64437 - 64700 | TIMKEN | — | |||
| 64450 | TIMKEN | — | |||
| 64450 - 64700D | TIMKEN | — | |||
| 64450 - 64700DC | TIMKEN | — | |||
| 64450 - 64701X | TIMKEN | — | |||
| 64450 - 64708 | TIMKEN | — | |||
| 64450W | TIMKEN | — | |||
| 64450W - 64700 | TIMKEN | — | |||
| 64450W - 64700D | TIMKEN | — | |||
| 64450W - 64700DC | TIMKEN | — | |||
| 64450W - 64701X | TIMKEN | — | |||
| 64450W - 64708 | TIMKEN | — | |||
| 64450W - 64713 | TIMKEN | — | |||
| 64452 | TIMKEN | — | |||
| 64452 - 64708 | TIMKEN | — | |||
| 64452A | TIMKEN | — | |||
| 64452A - 64700 | TIMKEN | — | |||
| 64452A - 64700D | TIMKEN | — | |||
| 64452A - 64700DC | TIMKEN | — | |||
| 64452A - 64701X | TIMKEN | — | |||
| 64452A - 64708 | TIMKEN | — | |||
| 64452A - 64713 | TIMKEN | — | |||
| 644/633 | ANDGE | 71.438 | 130.175 | 41.275 | — |
| 644/632 | ANDGE | 71.438 | 136.525 | 41.275 | — |
| 644/632B | ANDGE | 71.438 | 136.525 | — | |
| 644/644-6 | ANDGE | 71.438 | 136.525 | — | |
| 64413/64700 | ANDGE | 104.775 | 177.8 | — | |
| 64432/64700 | ANDGE | 109.974 | 177.8 | — | |
| 64432/64708 | TIMKEN | 109.974 | 179.974 | 41.275 | Cross-ref → |
| 64432/64708 | ANDGE | 109.974 | 180 | Cross-ref → | |
| 64433/64433-6 | ANDGE | 109.992 | 177.8 | — | |
| 64433/64700 | ANDGE | 109.992 | 177.8 | — | |
| 64433/64700 | TIMKEN | 109.992 | 177.8 | 41.275 | — |
| 64433/64700-B | TIMKEN | 109.992 | 177.8 | 18.258 | — |
| 64433/64700D | TIMKEN | 109.992 | 177.8 | 92.075 | — |
| 64433/64701X | ANDGE | 109.992 | 178 | — | |
| 64433/64708 | ANDGE | 109.992 | 180 | — | |
| 64432/64708 | SKF | 110 | 180 | 41.275 | Cross-ref → |
| 64437/64713 | ANDGE | 111.125 | 180.975 | 41.275 | — |
| 64450/700 | ANDGE | 114.3 | 177.348 | 41.275 | — |
| 64450/64450-6 | ANDGE | 114.3 | 177.8 | 92.075 | — |
| 64450/64700 | SKF | 114.3 | 177.8 | 41.275 | — |
| 64450/64700 | ANDGE | 114.3 | 177.8 | 41.275 | — |
| 64450/64700-B | TIMKEN | 114.3 | 177.8 | 18.258 | — |
| 64450/64700B | ANDGE | 114.3 | 177.8 | — | |
| 64450/64700D | ANDGE | 114.3 | 177.8 | 92.075 | — |
| 64450/64700D/C9 | ANDGE | 114.3 | 177.8 | 92.075 | — |
| 64450/64701X | ANDGE | 114.3 | 178 | — | |
| 64450/64708 | ANDGE | 114.3 | 180 | — | |
| 64452/64700 | ANDGE | 114.976 | 177.8 | 41.275 | — |
| 64452A/64700 | ANDGE | 114.976 | 177.8 | 41.275 | — |
| 64452A/64700B | ANDGE | 114.976 | 177.8 | — | |
| 64452A/64708 | ANDGE | 114.976 | 180 | 41.275 | — |
644 series bearings follow the ISO dimension plan for this family, so a given number is dimensionally interchangeable between brands - see the cross-reference to confirm. Choose the suffix for your duty: shields for dry, clean positions, contact seals for wet or dusty ones, and a larger clearance class where the fit or temperature demands it.
Other Tapered Roller Bearings series: EE · HM · LM · M · 320 · BT · 322 · L