| Tolerance grade | Classification of the length (mm) of the shorter side of the target angle | |||||
|---|---|---|---|---|---|---|
| symbol | Explanation | less than 10 | Over 10 less than 50 |
Over 50 120 or less |
Over 120 400 or less |
Over 400 Things |
| tolerance | ||||||
| f | Fine grade | ±1° | ±30′ | ±20′ | ±10′ | ±5′ |
| m | Intermediate | |||||
| c | Coarse grade | ±1°30′ | ±1° | ±30′ | ±15′ | ±10′ |
| v | Very coarse grade | ±3° | ±2° | ±1° | ±30′ | ±20′ |
| Reference: "JIS Handbook Machine Element 2001", page 581, Table 3 Quoted from the tolerance of angular dimensions. | ||||||