StandardsIS 2340DIN 2080
Cone tolerance AT4Original catalogue page (p. 12)(opens the scanned page in a new tab)DIN 2080 shank
Drawing
Shown here: ISO40
DIN 2080 shank
Dimensions
| ISO | 30 | 40 | 45 | 50 |
|---|---|---|---|---|
| D | 31.75 | 44.45 | 57.15 | 69.75 |
| LMax | 70 | 95 | 110 | 130 |
| L1 | 50 | 67 | 86 | 105 |
| d1a10 | 17.4 | 25.3 | 32.4 | 39.6 |
| G | M12 | M16 | M20 | M24 |
| D1h8 | 48 | 60 | 77 | 97 |
| a+0.1 | 9.6 | 11.6 | 13.2 | 15.2 |
| b±0.2 | 8.0 | 10.0 | 10.0 | 12.0 |
| y±0.4 | 1.6 | 3.2 | ||
| tMax | 16.2 | 22.5 | 29 | 35.3 |
| bH12 | 16.1 | 19.3 | 25.7 | |
| ISO | D | L | L1 | d1 | G | D1 | a | b | y | t | b |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Max | a10 | h8 | +0.1 | ±0.2 | ±0.4 | Max | H12 | ||||
| 30 | 31.75 | 70 | 50 | 17.4 | M12 | 48 | 9.6 | 8.0 | 1.6 | 16.2 | 16.1 |
| 40 | 44.45 | 95 | 67 | 25.3 | M16 | 60 | 11.6 | 10.0 | 22.5 | ||
| 45 | 57.15 | 110 | 86 | 32.4 | M20 | 77 | 13.2 | 10.0 | 3.2 | 29 | 19.3 |
| 50 | 69.75 | 130 | 105 | 39.6 | M24 | 97 | 15.2 | 12.0 | 35.3 | 25.7 |
DIN 2080 Deckel Maho shank
Drawing
Shown here: ISO40
DIN 2080 Deckel Maho shank
Dimensions
| ISO No. | 40 |
|---|---|
| D | 44.45 |
| LMax | 95 |
| L1 | 67 |
| d1a10 | 25.3 |
| G | M16 |
| D1h8 | 60 |
| a+0.1 | 11.6 |
| b±0.2 | 10.0 |
| y±0.4 | 1.6 |
| tMax | 22.5 |
| bH12 | 16.1 |
| ISO No. | D | L | L1 | d1 | G | D1 | a | b | y | t | b |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Max | a10 | h8 | +0.1 | ±0.2 | ±0.4 | Max | H12 | ||||
| 40 | 44.45 | 95 | 67 | 25.3 | M16 | 60 | 11.6 | 10.0 | 1.6 | 22.5 | 16.1 |
Taper accuracy
Cone tolerance AT4
Standards: ISO 1947- 1973 | IS 7615- 2003
| BT No. | 'α' Basic | Tolerance Grade AT4 | |||||
|---|---|---|---|---|---|---|---|
| Generating Angle Limits α/2 | AT α/2Secs | AT α/2 μRads | L | ATD(D1~D2) | |||
| Min | Max | ||||||
| 30 | 16°35'39.4" | 8°17'49.7" | 8°17'57.7" | 8 | 40 | 42 | 0.0034 |
| 35 | 8°17'49.7" | 8°17'57.7" | 8 | 40 | 53 | 0.0042 | |
| 40 | 8°17'49.7" | 8°17'56.2" | 6.5 | 31.5 | 59 | 0.0037 | |
| 45 | 8°17'49.7" | 8°17'56.2" | 6.5 | 31.5 | 74 | 0.0047 | |
| 50 | 8°17'49.7" | 8°17'54.7" | 5 | 25 | 92 | 0.0046 | |
Cone tolerance AT4
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