The point angle of a drill, for drilling stainless steel, is
A. 90°
B. 118°
C. 135°
D. 150°
Answer: Option C
Solution(By Examveda Team)
The point angle is located at the head of the twist drill. For hard materials such as stainless steel, the point angle should be large and e.g. 130° or 135°. For soft materials, point angles of e.g. 118° are used. With a large point angle, more of the cutting edge engages in the workpiece when drillingThis Question Belongs to Mechanical Engineering >> Manufacturing And Production Technology
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