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 | ||
| QJF1038X1 | 190 | 289.5 | 46 | 241 | 353 | 1000 | 1500 | 11.4 |
| QJ1038X1 | 190 | 289.5 | 46 | 241 | 353 | 1000 | 1500 | 11.4 |
| QJ336 | 180 | 380 | 75 | 640 | 1000 | 1000 | 1500 | 47.5 |
| QJF236 | 180 | 320 | 52 | 339 | 524 | 1100 | 1600 | 19.7 |
| QJ236 | 180 | 320 | 52 | 339 | 524 | 1100 | 1600 | 19.7 |
| QJF1036X1 | 180 | 259.5 | 46 | 220 | 327 | 1200 | 1600 | 8.15 |
| QJF1036 | 180 | 280 | 46 | 210 | 320 | 1300 | 1800 | 10.7 |
| QJ1036 | 180 | 280 | 46 | 210 | 320 | 1300 | 1800 | 10.7 |
| QJF3936X1 | 180 | 259.5 | 52 | 208 | 285 | 1200 | 1600 | 8.7 |
| QJ3936X1 | 180 | 259.5 | 52 | 208 | 285 | 1200 | 1600 | 8.7 |
| QJF334 | 170 | 360 | 72 | 420 | 580 | 1000 | 1500 | 38 |
| QJ334 | 170 | 360 | 72 | 420 | 580 | 1000 | 1500 | 38 |
| QJF234 | 170 | 310 | 52 | 315 | 470 | 1200 | 1700 | 18.1 |
| QJ234 | 170 | 310 | 52 | 315 | 470 | 1200 | 1700 | 18.1 |
| QJF1034 | 170 | 260 | 42 | 200 | 290 | 1400 | 1900 | 9 |
| QJ1034X1 | 170 | 259.5 | 42 | 200 | 290 | 1400 | 1900 | 8.3 |
| QJF232X2 | 160 | 290 | 50 | 180 | 276 | 1300 | 1700 | 14.5 |
| QJF232 | 160 | 290 | 48 | 280 | 400 | 1300 | 1800 | 14.7 |
| QJ232 | 160 | 290 | 48 | 280 | 400 | 1300 | 1800 | 14.7 |
| QJF1032X1 | 160 | 239.5 | 38 | 190 | 290 | 1500 | 2000 | 6.5 |
