Tools Used in Drilling
Drilling is an operation by which holes are produced in a solid metal by means of a revolving tool called drill.
A. Classification of Drills
B. Twist Drill Nomenclature
- Shank
- Tang
- Neck
- Body
- Flutes
- Web
- Cutting Lip or Edge
- Land
- Body Clearance
- Margin
- Heel
C. Important Angles of a Drill
- Rake Angle
- Point Angle
- Lip Clearance Angle
- Chisel Edge Angle
D. Drill Specifications