Four-point contact ball bearings are a special type of angular contact ball bearing designed to support axial loads in both directions with a single bearing arrangement.
- Four contact points between balls and raceways for bidirectional axial load support
- Single-row design with compact mounting dimensions
- Split inner ring structure for easier installation and maintenance
- Suitable for heavy industrial equipment requiring reliable axial positioning
- Available in QJ and QJF series with bore sizes from 100mm to 600mm
Applications
Steel Mill Equipment
Rolling mills, auxiliary equipment and industrial transmission systems.
Industrial Gearboxes
Large gear systems requiring reliable axial load support.
Heavy Machinery
Mining, construction and other heavy industrial equipment.
Material Handling Equipment
Lifting and handling systems with compact bearing arrangements.
Product Specifications
| Inquiry | Bearing No. | d | D | B | Cr | Cor | Weight |
|---|---|---|---|---|---|---|---|
| QJ3938X3 | 190 | 269.5 | 55 | 216 | 340 | 10.5 | |
| QJF3938X3 | 190 | 269.5 | 55 | 216 | 340 | 10.5 | |
| QJF1038X1 | 190 | 289.5 | 46 | 236 | 378 | 11.5 | |
| QJF238 | 190 | 340 | 55 | 347 | 569 | 39 | |
| QJ2940X2 | 200 | 280 | 51 | 216 | 340 | 10.2 | |
| QJF2940X2 | 200 | 280 | 51 | 216 | 340 | 10.2 | |
| QJ3940X3 | 200 | 289.5 | 58 | 235 | 384 | 13.2 | |
| QJF3940X3 | 200 | 289.5 | 58 | 235 | 384 | 13.2 | |
| QJ1040 | 200 | 310 | 51 | 294 | 473 | 15 | |
| QJF1040 | 200 | 310 | 51 | 294 | 473 | 15 | |
| QJF240 | 200 | 360 | 58 | 390 | 656 | 27 | |
| QJ240 | 200 | 360 | 58 | 390 | 656 | 27 | |
| QJ3944 | 220 | 300 | 60 | 221 | 364 | 13 | |
| QJ3944X1 | 220 | 309.5 | 60 | 246 | 412 | 14.8 | |
| QJF3944X1 | 220 | 309.5 | 60 | 246 | 412 | 14.8 | |
| QJ1044 | 220 | 340 | 56 | 300 | 503 | 19.6 | |
| QJF1044 | 220 | 340 | 56 | 300 | 503 | 19.6 | |
| QJF3948X1 | 240 | 329.5 | 60 | 256 | 444 | 16 | |
| QJF3948X1-1 | 240 | 340 | 60 | 271 | 477 | 17.6 | |
| QJ1048 | 240 | 360 | 56 | 335 | 611 | 21 |