Question

A 50 mm diameter disc is to be punched out from a carbon steel sheet 1.0 mm thick. The diameter of the punch should be

• A. 49.925 mm
• B. 50.00 mm
• C. 50.075 mm
• D. 49.754 mm

Hint:

Remember:
- In Blanking $\to$ Die size is constant and equal to the blank size.
- In Punching $\to$ Punch size is constant and equal to the hole size.
Clearance is always applied to the other tool member to prevent binding.

Answer 1

The Correct Option is B