Four-point angular contact ball bearings feature a special dual-half-inner-ring design, enabling them to withstand radial loads and bidirectional axial loads, with a single bearing set providing bidirectional positioning. They have a compact footprint and are easier to install than two sets of single-row angular contact bearings. They offer good maximum rotational speeds but lack self-aligning capability. They are commonly used in gearboxes, screw compressors, slewing rings, pumps and valves, and other applications where bidirectional axial loads must be supported and installation space is limited.
| Bearing model number | Basic Dimensions（mm） | Basic load （KN） |
Rated speed(rpm) | Bearing weight | ||||
|---|---|---|---|---|---|---|---|---|
| d inner diameter |
D outer diameter |
B thickness |
Dynamic load Cr |
Static load Cor |
Grease lubrication | Oil lubrication | ||
| QJF1064 | 320 | 480 | 74 | 420 | 920 | 740 | 1000 | 50 |
| QJ1064 | 320 | 480 | 74 | 420 | 920 | 740 | 1000 | 50 |
| QJF1060X1 | 300 | 459.5 | 74 | 400 | 860 | 770 | 1060 | 47.5 |
| QJF1060 | 300 | 460 | 74 | 400 | 860 | 770 | 1060 | 47.5 |
| QJ1060 | 300 | 460 | 74 | 400 | 860 | 770 | 1060 | 47.5 |
| QJ2960X2 | 300 | 420 | 65 | 363 | 559 | 760 | 1100 | 29.4 |
| QJFO658X1 | 290 | 409.5 | 65 | 350 | 540 | 800 | 1200 | 27.2 |
| QJFO658X3 | 288.95 | 406.5 | 60 | 227 | 450 | 840 | 1000 | 24.5 |
| QJF1056X1 | 280 | 389.5 | 65 | 330 | 670 | 850 | 1100 | 33.5 |
| QJF1056 | 280 | 420 | 65 | 330 | 670 | 850 | 1100 | 33.5 |
| QJ1056 | 280 | 420 | 65 | 330 | 670 | 850 | 1100 | 32.3 |
| QJF2956X3 | 280 | 375 | 65 | 200 | 350 | 800 | 1200 | 30.5 |
| QJ2956X3 | 280 | 375 | 65 | 200 | 350 | 800 | 1200 | 30.5 |
| QJ654 | 270 | 400 | 60 | 390 | 560 | 800 | 1200 | 26.5 |
| QJ654X1 | 270 | 399.5 | 60 | 385 | 555 | 800 | 1200 | 26.2 |
| QJF1052 | 260 | 400 | 65 | 320 | 630 | 890 | 1200 | 27.5 |
| QJ1052 | 260 | 400 | 65 | 320 | 630 | 890 | 1200 | 27.5 |
| QJ2952X1 | 260 | 369.5 | 60 | 311 | 546 | 750 | 1250 | 25 |
| QJF2952X1 | 260 | 369.5 | 60 | 311 | 546 | 750 | 1250 | 25 |
| QJF2952X2 | 260 | 360 | 65 | 277 | 400 | 810 | 1100 | 21.2 |
