Shapes and dimensions of chamfers and simple fillets
Guide values for chamfers
| Diameter d [mm] | <10 | 10…20 | 20…30 | 30…45 | 45…70 | 70…100 |
|---|---|---|---|---|---|---|
| c [mm] | 0.5 | 1 | 1.5 | 2 | 2.5 | 3 |
Guide values for fillet radii, r 
< 0.7(D − d)/2
| D−d | r | D−d | r | D−d | r | D−d | r | D−d | r | D−d | r |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2 | 1 | 10 | 4 | 25 | 10 | 40 | 16 | 60 | 20 | 100 | 30 |
| 5 | 2 | 15 | 5 | 30 | 12 | 50 | 16 | 70 | 25 | 130 | 30 |
| 8 | 3 | 25 | 8 | 35 | 12 | 55 | 20 | 90 | 25 | 140 | 40 |
Preferred fillet radii r [mm] (extract from STAS 406-73)
| Series I | Series II | Series I | Series II | Series I | Series II |
|---|---|---|---|---|---|
| 0.1 | 0.1 | 6.0 | 6.0 | 63 | 56 |
| 0.2 | 0.2 | 8.0 | 63 | ||
| 0.3 | 10 | 10 | 70 | ||
| 0.4 | 0.4 | 12 | 80 | 80 | |
| 0.5 | 16 | 16 | 90 | ||
| 0.6 | 0.6 | 18 | 100 | 100 | |
| 0.8 | 20 | 20 | 110 | ||
| 1.0 | 1.0 | 22 | 125 | 125 | |
| 1.2 | 25 | 25 | 140 | ||
| 1.6 | 1.6 | 28 | 160 | 160 | |
| 2.0 | 32 | 32 | 180 | ||
| 2.5 | 2.5 | 36 | 200 | 200 | |
| 3.0 | 40 | 40 | 220 | ||
| 4.0 | 4.0 | 45 | 250 | 250 | |
| 5.0 | 50 | 50 |
Note. Series I values are preferred.