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A blank of 50 mm diameter is to be sheared from a sheet of 2.5 mm thickness. The required radial clearance between the die and the punch is 6% of sheet thickness. The punch and die diameter (mm) for this blanking operation respectively are
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- 50.00 and 50.30
- 50.00 and 50.15
- 49.70 and 50.00
- 49.85 and 50.00
Correct Option: C
| Radial clearance = | × t = 0.1 ≤ 1.5 mm | |
| 100 |
Total clearance = 2 × 0.15 = 0.3
Die Dia will be exact = 50 mm
Clearance will be provided on punch = 50–0.30 = 49.70 mm
