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| 轴承现行代号 | 轴承曾用代号 | 外形尺寸（mm） | 重量（kg） | ||
| d | D | T | |||
| 31303 | 27303E | 17 | 47 | 15.25 | |
| 31303/P5 | D27303E | 17 | 47 | 15.25 | |
| 31303/P6x | Ex27303E | 17 | 47 | 15.25 | |
| 31304 | 27304E | 20 | 52 | 16.5 | |
| 31305 | 27305E | 25 | 62 | 18.25 | 0.26 |
| 31305E | 25 | 62 | 18.25 | ||
| 31305/P5 | D27350E | 25 | 62 | 18.25 | 0.258 |
| 31305/P6 | E27305E | 25 | 62 | 18.25 | |
| 31305/P6x | Ex27305E | 25 | 62 | 18.25 | 0.268 |
| 31305A/P6 | E27305 | 25 | 62 | 18.5 | 0.268 |
| 31305A | 25 | 62 | 18.25 | ||
| 31305 X2/YB2 | 25 | 62 | 18.25 | ||
| 31306 | 27306E | 30 | 72 | 20.75 | |
| 31306E | 30 | 72 | 20.75 | ||
| 31306J | 30 | 72 | 20.75 | 0.392 | |
| 31306/P5 | D27306E | 30 | 72 | 20.75 | |
| 31306/P6 | E27306E | 30 | 72 | 20.75 | |
| 31306/P6x | Ex27306E | 30 | 72 | 20.75 | 0.398 |
| 31306WB1 | 30 | 72 | 20.75 | ||
| 31306B | 27306B | 30 | 72 | 20.75 | 0.372 |
| 31306B/P6x | 30 | 72 | 20.75 | 0.36 | |
| 31307 | 27307E | 35 | 80 | 22.75 | |
| 31307E | 35 | 80 | 22.75 | ||
| 31307/P5 | D27307E | 35 | 80 | 22.75 | |
| 31307/P6 | E27307E | 35 | 80 | 22.75 | |
| 31307/P6x | Ex27307E | 35 | 80 | 22.75 | 0.66 |
| 31308 | 27308E | 40 | 90 | 25.25 | |
| 31308E | 40 | 90 | 25.25 | ||
| 31308/P5 | D27308E | 40 | 90 | 25.25 | |
| 31308/P6 | E27308E | 40 | 90 | 25.25 | |
| 31308/P6x | Ex27308E | 40 | 90 | 25.25 | |
| 31309 | 27309E | 45 | 100 | 27.25 | 2.977 |
| 31309A | 45 | 100 | 27.25 | 0.949 | |
| 31309E | 45 | 100 | 27.25 | ||
| 31309/P5 | D27309E | 45 | 100 | 27.25 | |
| 31309/P6 | E27309E | 45 | 100 | 27.25 | 0.944 |
