| Bearing model | Boundary Dimensions（mm） | ||
|---|---|---|---|
| d | D | B | |
| 71921 ACD/P4A | 105 | 145 | 20 |
| 71921 CD/HCP4AH1 | 105 | 145 | 20 |
| 7021 ACD/HCP4AH1 | 105 | 160 | 26 |
| 7021 ACD/P4AL | 105 | 160 | 26 |
| 71821 CD/HCP4 | 105 | 130 | 13 |
| 71921 CD/P4AL | 105 | 145 | 20 |
| 71921 ACD/HCP4AL | 105 | 145 | 20 |
| 7021 ACD/P4AH1 | 105 | 160 | 26 |
| 7021 ACD/HCP4A | 105 | 160 | 26 |
| 71921 ACD/HCP4A | 105 | 145 | 20 |
| 7221 ACD/P4A | 105 | 190 | 36 |
| S71921 CD/HCP4A | 105 | 145 | 20 |
| 7221 CD/P4A | 105 | 190 | 36 |
| 7021 ACD/P4A | 105 | 160 | 26 |
| 71821 ACD/HCP4 | 105 | 130 | 13 |
| 7221 CD/HCP4A | 105 | 190 | 36 |
| 71821 ACD/P4 | 105 | 130 | 13 |
| S7021 ACD/P4A | 105 | 160 | 26 |
| 71920 CD/HCP4AL | 100 | 140 | 20 |
| 71920 CE/HCP4A | 100 | 140 | 20 |
| 7220 ACD/HCP4A | 100 | 180 | 34 |
| S7020 ACB/HCP4A | 100 | 150 | 24 |
| 71920 CE/HCP4AH1 | 100 | 140 | 20 |
| S7020 CD/HCP4A | 100 | 150 | 24 |
| 71920 ACE/HCP4AH1 | 100 | 140 | 20 |
| 7020 ACB/P4AL | 100 | 150 | 24 |
| 7020 ACD/HCP4A | 100 | 150 | 24 |
| 71920 ACD/P4AL | 100 | 140 | 20 |
| S71920 CB/HCP4A | 100 | 140 | 20 |
| 71820 ACD/HCP4 | 100 | 125 | 13 |
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