46) A slight convexity is made on the cutting edges of flat chisel for
Preventing digging of the ends of cutting edge
Related Cutting Tools MCQ - Machinist(Set-1) with Answers
Material to be drilled
The point angle of a general purpose (standard) drill is 118°. This is the angle between the cutting edges (lips). The angle varies according to the hardness of the material to be drilled.
For general purpose use point angle of twist drill is 118 Degree.
Lip clearance angle
The relief angle given behind the cutting lips is called Lip Clearance angle