1. Helix or rake angle
  2. Point angle
  3. Chisel edge angle
  4. Lip clearance angle
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1 Answers

Answer: Option 3

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.

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