Cylindrical Roller Bearings
Prefix, Designation and Suffix of Cylindrical Roller Bearings
| Description | Intercharge | |||
| NSK | SKF | FAG | ||
| Prefix | Single row, no flange on outer ring | N | N | N |
| Single row, no flange on inner ring | NU | NU | NU | |
| Single row, 1 flange inner | NJ | NJ | NJ | |
| Single row, 1 flange outer | NF | NF | -- | |
| Single row, 1 flange inner, with retaining ring | NUP | NUP | NUP | |
| Single row, 1 flange inner, w/stabalizing ring | NH | NH | NH | |
| Stabalizing ring | HJ | HJ | HJ | |
| Double row, flanges outer/fanges inner | NNU/NN | NNU/NN | NNU/NN | |
| Part No. | Light | 2XX | 2XX | 2XX |
| Medium | 3XX | 3XX | 3XX | |
| Heavy | 4XX | 4XX | 4XX | |
| Extra light | 10XX | 10XX | 10XX | |
| Light, wide | 22XX | 22XX | 22XX | |
| Medim, wide | 23XX | 23XX | 23XX | |
| Part No. Suffix | Polyamide cage | T | P | TVP2 |
| Composite high temp (200F) cage | T7 | -- | -- | |
| Machined brass cage | M | M | M, M1 | |
| Pressed steel cage | W, WS | J | JP1 | |
| High capacity design | E | EC | E | |
| Full complement (no cage) | V | V | V | |
| Tight clearance | C2 | C2 | C2 | |
| Normal clearance | Blank | Blank | Blank | |
| Loose clearance | C3 | C3 | C3 | |
| Extra loose clearance | C4 | C4 | C4 | |