Helix angle in the twist drill determines the
| Helix angle in the twist drill determines the
A. Clearance angle
B. Rake Angle
C. Point angle
D. Inclination
Please scroll down to see the correct answer and solution guide.
Right Answer is: B
SOLUTION
- Rake angle (helix angle) is the flute angle. Helix angle is the angle between the leading edge of the land and the axis of the drill. It is also known as the spiral angle. The usual value of helix angle of a drill is 30°.
- The relief angle given behind the cutting lips is called the lip clearance angle.
- It is provided to prevent the friction behind the cutting edges and helps in the penetration of the cutting edges into the work-piece.
- Chisel edge angle is the angle between the chisel edge and cutting lip.
