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.
47) The point angle of twist drill depends upon the
Material to be drilled
Related Cutting Tools MCQ - Machinist(Set-1) with Answers
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
Counter-boring is the process of enlarging the end of an existing hole to accommodate the head of socket screw.