StandardsISO 7388-1-ADIN 69871 (OBS)IS:11173 (Part 1)
Cone tolerance AT3Original catalogue page (p. 9)(opens the scanned page in a new tab)SK/ISO shank
Drawing
SK/ISO shank
Dimensions
| SK/ISO | 30 | 40 | 45 | 50 |
|---|---|---|---|---|
| D | 31.75 | 44.45 | 57.15 | 69.75 |
| L-0.3 | 47.8 | 68.4 | 82.7 | 101.75 |
| d1H7 | 13 | 17 | 21 | 25 |
| G | M12 | M16 | M20 | M24 |
| D1h8 | 50 | 63.55 | 82.55 | 97.50 |
| D2Max | 45.0 | 50.0 | 63.0 | 80.0 |
| t-0.4 | 16.4 | 22.8 | 29.1 | 35.5 |
| t1-0.4 | 19.0 | 25.0 | 31.3 | 37.7 |
| bH12 | 16.1 | 16.1 | 19.3 | 25.7 |
| K-0.3 | 15.00 | 18.5 | 24.0 | 30.0 |
| SK/ISO | D | L | d1 | G | D1 | D2 | t | t1 | b | K |
|---|---|---|---|---|---|---|---|---|---|---|
| -0.3 | H7 | h8 | Max | -0.4 | -0.4 | H12 | -0.3 | |||
| 30 | 31.75 | 47.8 | 13 | M12 | 50 | 45.0 | 16.4 | 19.0 | 16.1 | 15.00 |
| 40 | 44.45 | 68.4 | 17 | M16 | 63.55 | 50.0 | 22.8 | 25.0 | 16.1 | 18.5 |
| 45 | 57.15 | 82.7 | 21 | M20 | 82.55 | 63.0 | 29.1 | 31.3 | 19.3 | 24.0 |
| 50 | 69.75 | 101.75 | 25 | M24 | 97.50 | 80.0 | 35.5 | 37.7 | 25.7 | 30.0 |
SK/ISO shank
Coolant forms
Taper accuracy
Cone tolerance AT3
Standards: ISO 1947- 1973 | IS 7615- 2003
| SK/ISO | 'α' Basic | Tolerance Grade AT3 | |||||
|---|---|---|---|---|---|---|---|
| Generating Angle Limits α/2 | AT α/2Secs | AT α/2μ Rads | L | ATD(D1 ~D2) | |||
| Min | Max | ||||||
| 30 | 16°35'39.4" | 8°17'51.2" | 8°17'57.7" | 6.5 | 31.5 | 42 | 0.0026 |
| 35 | 8°17'52.7" | 8°17'57.7" | 5 | 31.5 | 53 | 0.0033 | |
| 40 | 8°17'51.2" | 8°17'56.2" | 5 | 20 | 59 | 0.0024 | |
| 45 | 8°17'52.2" | 8°17'56.2" | 4 | 15.75 | 74 | 0.0030 | |
| 50 | 8°17'50.7" | 8°17'54.7" | 4 | 15.75 | 92 | 0.0029 | |
Cone tolerance AT3
Material & heat treatment
- Material
- Carburizing Alloy Steel
- Heat Treatment
- Surface Hardness HRc 58±2Case Depth 0.6-1.0 mm @ HV1 550Tensile Strength 1000 MPa Minimum