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 | |
| 23218 MB/W33 | 23218 MBK/W33 | 90 | 160 | 52.4 | 369 | 437 | 3300 | 4.65 |
| 22218 MB/W33 | 22218 MBK/W33 | 90 | 160 | 40 | 328 | 373 | 4700 | 3.4 |
| 22317 MB/W33 | 22317 MBK/W33 | 85 | 180 | 60 | 586 | 617 | 3400 | 7.65 |
| 21317 MB/W33 | 21317 MBK/W33 | 85 | 180 | 41 | 327 | 371 | 4700 | 5.2 |
| 22217 MB/W33 | 22217 MBK/W33 | 85 | 150 | 36 | 287 | 323 | 5000 | 2.7 |
| 22316 MB/W33 | 22316 MBK/W33 | 80 | 170 | 58 | 514 | 536 | 3400 | 6.6 |
| 21316 MB/W33 | 21316 MBK/W33 | 80 | 170 | 39 | 329 | 374 | 4700 | 4.45 |
| 22216 MB/W33 | 22216 MBK/W33 | 80 | 140 | 33 | 239 | 265 | 5400 | 2.1 |
| 22315 MB/W33 | 22315 MBK/W33 | 75 | 160 | 55 | 470 | 474 | 3800 | 5.55 |
| 21315 MB/W33 | 21315 MBK/W33 | 75 | 160 | 37 | 289 | 321 | 5000 | 3.75 |
| 22215 MB/W33 | 22215 MBK/W33 | 75 | 130 | 31 | 216 | 240 | 5400 | 1.7 |
| 24015 MB/W33 | 24015 MBK30/W33 | 75 | 115 | 40 | 178 | 229 | 4700 | 1.55 |
| 22314 MB/W33 | 22314 MBK/W33 | 70 | 150 | 51 | 419 | 427 | 3900 | 4.55 |
| 21314 MB/W33 | 21314 MBK/W33 | 70 | 150 | 35 | 291 | 321 | 4800 | 3.1 |
| 22214 MB/W33 | 22214 MBK/W33 | 70 | 125 | 31 | 212 | 226 | 5900 | 1.55 |
| 22313 MB/W33 | 22313 MBK/W33 | 65 | 140 | 48 | 361 | 353 | 4300 | 3.75 |
| 21313 MB/W33 | 21313 MBK/W33 | 65 | 140 | 33 | 239 | 267 | 5200 | 2.55 |
| 22213 MB/W33 | 22213 MBK/W33 | 65 | 120 | 31 | 195 | 213 | 6100 | 1.55 |
| 24013 MB/W33 | 24013 MBK/W33 | 65 | 100 | 35 | 137 | 172 | 5600 | 0.95 |
| 22312 MB/W33 | 22312 MBK/W33 | 60 | 130 | 46 | 326 | 333 | 4700 | 3.1 |
