Shapes and dimensions (ISO 6411)
Note. Form A, without protective chamfer, is made with a centre drill according to ISO 866.
Form B, with protective chamfer, is made with a centre drill according to ISO 2540.
Dimension values
| Form | A and B | B | |||
|---|---|---|---|---|---|
| Shaft diameter D1 [mm] | d1 [mm] | d2 [mm] | t (min) [mm] | d3 [mm] | b [mm] |
| 5–10 | 1 | 2.12 | 2.2 | 3.15 | 0.3 |
| 11–15 | 1.6 | 3.35 | 3.4 | 5 | 0.5 |
| 16–22 | 2.5 | 5.3 | 5.4 | 8 | 0.8 |
| 23–24 | 4 | 8.5 | 8.6 | 12.5 | 1.2 |
| 41–63 | 6.3 | 13.2 | 12.9 | 18 | 1.4 |
| 64–100 | 10 | 21.2 | 20.4 | 28 | 2 |
Designation in assembly drawings
Centre hole A d1/d2 SR ISO 6411/97 (e.g. Centre hole A 1.6/3.35 SR ISO 6411/97).
Centre hole B d1/d3 SR ISO 6411/97 (e.g. Centre hole B 1.6/5 SR ISO 6411/97).