Mechanical Engineering - Production Engineering - Discussion
Discussion Forum : Production Engineering - Section 7 (Q.No. 31)
31.
In drilling bakellite and fibrous plastics, the point angle of a drill is
Discussion:
3 comments Page 1 of 1.
Deepak kumar said:
3 years ago
Plastics: 60 to 90.
Stainless Steel: 118 to 135.
Cast Iron: 90 to 118.
Stainless Steel: 118 to 135.
Cast Iron: 90 to 118.
(2)
Nitin said:
8 years ago
It Should be less than 118 so 90.
Jay said:
9 years ago
Why 90°? Can anyone explain it?
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