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 | ||
| QJ1296 | 480 | 870 | 170 | 1680 | 4750 | 500 | 670 | 470 |
| QJ1096 | 480 | 700 | 100 | 1060 | 2800 | 560 | 750 | 135 |
| QJ1292 | 460 | 830 | 165 | 1530 | 4250 | 530 | 700 | 415 |
| QJ1092 | 460 | 680 | 100 | 1040 | 2650 | 600 | 800 | 130 |
| QJ1088 | 440 | 650 | 94 | 995 | 2500 | 630 | 850 | 115 |
| QJ1988 | 440 | 600 | 74 | 761 | 1900 | 670 | 900 | 6.5 |
| QJ1084 | 420 | 620 | 90 | 923 | 2280 | 670 | 900 | 99.5 |
| QJ1984 | 420 | 560 | 65 | 637 | 1600 | 700 | 950 | 51 |
| QJ1280 | 400 | 720 | 140 | 1300 | 3250 | 600 | 800 | 265 |
| QJ1080 | 400 | 600 | 90 | 904 | 2160 | 700 | 950 | 95.5 |
| QJF1880X1 | 400 | 499.5 | 46 | 280 | 475 | 850 | 1100 | 22.2 |
| QJ1276 | 380 | 680 | 132 | 1170 | 2850 | 670 | 900 | 220 |
| QJ1076 | 380 | 560 | 82 | 819 | 1900 | 750 | 1000 | 73.5 |
| QJ1272 | 360 | 650 | 122 | 1110 | 2600 | 700 | 950 | 190 |
| QJF1072 | 360 | 540 | 82 | 793 | 1800 | 800 | 1100 | 70.5 |
| QJ1072 | 360 | 540 | 82 | 793 | 1800 | 800 | 1100 | 70.5 |
| QJF1068 | 340 | 520 | 82 | 600 | 1400 | 680 | 940 | 67.5 |
| QJ1068 | 340 | 520 | 82 | 600 | 1400 | 680 | 940 | 67.5 |
| QJF29/321X2 | 321 | 440 | 65 | 375 | 710 | 750 | 1000 | 31.1 |
| QJ29/321X2 | 321 | 440 | 65 | 375 | 710 | 750 | 1000 | 31.1 |
