Q25
The obtuse angle, included between the chisel edge and the lip as viewed from the end of a drill, is called
A.
Helix or rake angle
B.
Point angle
C.
Chisel edge angle
AnswerD.
Lip clearance angle
Answer: Option C
Solution
Answer: Option C
Solution:
The obtuse angle, included between the chisel edge and the lip as viewed from the end of a drill, is called Chisel edge angle
It is the angle included between the chisel edge and lip of the twist drill when measuring on a plane normal to the axis.