| Bearing type | Boundary Dimensions（mm） | ||
|---|---|---|---|
| d | D | B | |
| NNU 4921 BK/SPW33 | 105 | 145 | 40 |
| NNU 4922 B/SPW33 | 110 | 150 | 40 |
| NNU 4922 BK/SPW33 | 110 | 150 | 40 |
| NNU 4924 B/SPW33 | 120 | 165 | 45 |
| NNU 4924 BK/SPW33 | 120 | 165 | 45 |
| NNU 4926 B/SPW33 | 130 | 180 | 50 |
| NNU 4926 BK/SPW33 | 130 | 180 | 50 |
| NNU 4928 B/SPW33 | 140 | 190 | 50 |
| NNU 4928 BK/SPW33 | 140 | 190 | 50 |
| NNU 4930 B/SPW33 | 150 | 210 | 60 |
| NNU 4930 BK/SPW33 | 150 | 210 | 60 |
| NNU 4932 B/SPW33 | 160 | 220 | 60 |
| NNU 4932 BK/SPW33 | 160 | 220 | 60 |
| NNU 4934 B/SPW33 | 170 | 230 | 60 |
| NNU 4934 BK/SPW33 | 170 | 230 | 60 |
| NNU 4936 B/SPW33 | 180 | 250 | 69 |
| NNU 4936 BK/SPW33 | 180 | 250 | 69 |
| NNU 4938 B/SPW33 | 190 | 260 | 69 |
| NNU 4938 BK/SPW33 | 190 | 260 | 69 |
| NNU 4940 B/SPW33 | 200 | 280 | 80 |
| NNU 4940 BK/SPW33 | 200 | 280 | 80 |
| NNU 4944 B/SPW33 | 220 | 300 | 80 |
| NNU 4944 BK/SPW33 | 220 | 300 | 80 |
| NNU 4948 B/SPW33 | 240 | 320 | 80 |
| NNU 4948 BK/SPW33 | 240 | 320 | 80 |
| NNU 4952 B/SPW33 | 260 | 360 | 100 |
| NNU 4952 BK/SPW33 | 260 | 360 | 100 |
| NNU 4956 B/SPW33 | 280 | 380 | 100 |
| NNU 4956 BK/SPW33 | 280 | 380 | 100 |
| NNU 4960 B/SPW33 | 300 | 420 | 118 |
