Q. A point angle of 135 - 150? on twist drills is used for drilling (Solved)
1. Mild steel
2. Hard steels and nickel alloys
3. Cast iron
4. Bakelite
5. Plastics
- b. Hard steels and nickel alloys
1. Mild steel
2. Hard steels and nickel alloys
3. Cast iron
4. Bakelite
5. Plastics