The purpose of helical grooves in a twist drill is to
1. Improve the stiffness,
2. Save a tool, material ,
3. Provide space for chip removal
4. Provide rake angle for the cutting edge
Select the correct answer using the codes given below :
Option (A)
1 and 2
Option (B)
2 and 3
3 and 4
1 and 4
Correct Option:
Question Solution:
The main purpose of helical grooves in twist drill is to provide space for chip removal provide rake angle for cutting edge, provide path of cutting fluid (coolant)