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 | |
| 249/850 MB/W33 | 249/850 MBK30/W33 | 850 | 1120 | 272 | 9290 | 22600 | 360 | 740 |
| 239/850 MB/W33 | 239/850 MBK/W33 | 850 | 1120 | 200 | 7031 | 15420 | 410 | 560 |
| 238/850 MB/W33 | 238/850 MBK/W33 | 850 | 1030 | 136 | 3880 | 9980 | 470 | 240 |
| 232/800 MB/W33 | 232/800 MBK/W33 | 800 | 1420 | 488 | 25160 | 42410 | 250 | 3280 |
| 241/800 MB/W33 | 241/800 MBK30/W33 | 800 | 1280 | 475 | 21893 | 40380 | 180 | 2300 |
| 231/800 MB/W33 | 231/800 MBK/W33 | 800 | 1280 | 375 | 18285 | 31400 | 350 | 1920 |
| 240/800 MB/W33 | 240/800 MBK30/W33 | 800 | 1150 | 345 | 13547 | 28370 | 340 | 1200 |
| 230/800 MB/W33 | 230/800 MBK/W33 | 800 | 1150 | 258 | 10257 | 19790 | 420 | 895 |
| 249/800 MB/W33 | 249/800 MBK30/W33 | 800 | 1060 | 258 | 8123 | 19260 | 370 | 640 |
| 239/800 MB/W33 | 239/800 MBK/W33 | 800 | 1060 | 195 | 6490 | 14270 | 460 | 470 |
| 248/800 MB/W33 | 248/800 MBK30/W33 | 800 | 980 | 180 | 4811 | 12720 | 500 | 300 |
| 232/750 MB/W33 | 232/750 MBK/W33 | 750 | 1360 | 475 | 21420 | 36390 | 260 | 3050 |
| 241/750 MB/W33 | 241/750 MBK30/W33 | 750 | 1220 | 475 | 20291 | 37230 | 190 | 2100 |
| 231/750 MB/W33 | 231/750 MBK/W33 | 750 | 1220 | 365 | 16356 | 28930 | 380 | 1700 |
| 240/750 MB/W33 | 240/750 MBK30/W33 | 750 | 1090 | 335 | 12054 | 24630 | 380 | 1070 |
| 230/750 MB/W33 | 230/750 MBK/W33 | 750 | 1090 | 250 | 9901 | 18290 | 470 | 795 |
| 249/750 MB/W33 | 249/750 MBK30/W33 | 750 | 1000 | 250 | 7757 | 17930 | 410 | 560 |
| 239/750 MB/W33 | 239/750 MBK/W33 | 750 | 1000 | 185 | 6164 | 13060 | 480 | 420 |
| 238/750 MB/W33 | 238/750 MBK/W33 | 750 | 920 | 128 | 3387 | 8460 | 520 | 185 |
| 232/710 MB/W33 | 232/710 MBK/W33 | 710 | 1280 | 450 | 21348 | 33960 | 280 | 2610 |
