The MB-type self-aligning roller bearing features a double-row, symmetrical barrel-shaped roller configuration, fitted with a two-piece, solid, machined brass cage. Designed with an inner ring guide, the inner ring is fitted with a central rib to ensure stable positioning of the rollers during operation. As the MB type relies on the inner ring to guide the cage, it operates more smoothly and offers superior high-speed stability compared to the MA type; compared to the CA type, the split cage provides better heat dissipation. They are widely used in rolling mills, large fans, cement plant equipment, conveyors, paper-making machinery and heavy-duty gearboxes.
| Bearing model number | Basic Dimensions（mm） | Basic load （KN） |
Rated speed(rpm) | Bearing weight | ||||
|---|---|---|---|---|---|---|---|---|
| Cylindrical hole | Conical hole | d inner diameter |
D outer diameter |
B thickness |
Dynamic load Cr |
Static load Cor |
Limiting Speed | |
| 248/1800 MB/W33 | 248/1800 MBK30/W33 | 1800 | 2180 | 375 | 20274 | 62690 | 120 | 2900 |
| 249/1500 MB/W33 | 249/1500 MBK30/W33 | 1500 | 1950 | 450 | 20889 | 62830 | 3550 | |
| 248/1500 MB/W33 | 248/1500 MBK30/W33 | 1500 | 1820 | 315 | 14757 | 44140 | 190 | 1710 |
| 249/1320 MB/W33 | 249/1320 MBK30/W33 | 1320 | 1720 | 400 | 18889 | 48350 | 170 | 2500 |
| 248/1320 MB/W33 | 248/1320 MBK30/W33 | 1320 | 1600 | 280 | 11276 | 33340 | 230 | 1160 |
| 230/1250 MB/W33 | 230/1250 MBK/W33 | 1250 | 1750 | 375 | 21125 | 44100 | 210 | 2840 |
| 240/1180 MB/W33 | 240/1180 MBK30/W33 | 1180 | 1660 | 475 | 25876 | 57900 | 190 | 3320 |
| 249/1180 MB/W33 | 249/1180 MBK30/W33 | 1180 | 1540 | 355 | 15586 | 40280 | 210 | 1800 |
| 239/1180 MB/W33 | 239/1180 MBK/W33 | 1180 | 1540 | 272 | 13119 | 30970 | 270 | 1400 |
| 248/1180 MB/W33 | 248/1180 MBK30/W33 | 1180 | 1420 | 243 | 8965 | 26560 | 280 | 770 |
| 238/1180 MB/W33 | 238/1180 MBK/W33 | 1180 | 1420 | 180 | 6851 | 18460 | 280 | 575 |
| 240/1120 MB/W33 | 240/1120 MBK30/W33 | 1120 | 1580 | 462 | 22569 | 49160 | 210 | 2930 |
| 249/1120 MB/W33 | 249/1120 MBK30/W33 | 1120 | 1460 | 335 | 13811 | 34240 | 230 | 1500 |
| 248/1120 MB/W33 | 248/1120 MBK30/W33 | 1120 | 1360 | 243 | 8357 | 23910 | 300 | 735 |
| 240/1060 MB/W33 | 240/1060 MBK30/W33 | 1060 | 1500 | 438 | 20759 | 45120 | 230 | 2520 |
| 230/1060 MB/W33 | 230/1060 MBK/W33 | 1060 | 1500 | 325 | 15898 | 33610 | 280 | 1840 |
| 249/1060 MB/W33 | 249/1060 MBK30/W33 | 1060 | 1400 | 335 | 13271 | 32330 | 240 | 1400 |
| 239/1060 MB/W33 | 239/1060 MBK/W33 | 1060 | 1400 | 250 | 11436 | 25720 | 320 | 1100 |
| 248/1060 MB/W33 | 248/1060 MBK30/W33 | 1060 | 1280 | 218 | 6831 | 19840 | 340 | 570 |
| 238/1060 MB/W33 | 238/1060 MBK/W33 | 1060 | 1280 | 165 | 5638 | 14710 | 330 | 435 |
