| Bearing model number | Basic Dimensions（mm） | Bearing weight | ||
|---|---|---|---|---|
| d inner diameter |
D outer diameter |
B thickness |
||
| 31306 | 30 | 72 | 20.75 | 0.392 |
| 31305 | 25 | 62 | 18.25 | 0.262 |
| 31304 | 20 | 52 | 16.5 | 0.17 |
| 33221 | 105 | 190 | 68 | 8.12 |
| 33220 | 100 | 180 | 63 | 6.71 |
| 33219 | 95 | 170 | 58 | 5.48 |
| 33218 | 90 | 160 | 55 | 4.55 |
| 33217 | 85 | 150 | 49 | 3.56 |
| 33216 | 80 | 140 | 46 | 2.83 |
| 33215 | 75 | 130 | 41 | 2.17 |
| 33214 | 70 | 125 | 41 | 2.1 |
| 33213 | 65 | 120 | 41 | 1.99 |
| 33212 | 60 | 110 | 38 | 1.51 |
| 33211 | 55 | 100 | 35 | 1.15 |
| 33210 | 50 | 90 | 32 | 0.825 |
| 33209 | 45 | 85 | 32 | 0.771 |
| 33208 | 40 | 80 | 32 | 0.715 |
| 33207 | 35 | 72 | 28 | 0.515 |
| 33206 | 30 | 62 | 25 | 0.342 |
| 33205 | 25 | 52 | 22 | 0.216 |
