15 Main Parts of Twist-Drill | Machine Tools | Industrial Engineering
The following points highlight the fifteen main parts of twist drill. The parts are: 1. Body 2. Shank 3. Dead Centre 4. Point 5. Cutting Edge 6. Lips 7. Lip Clearance 8. Margin 9. Body Clearance 10. Webs 11. Rake Angle of a Drill 12. Helix Angle 13. Point Angle 14. Chisel-Edge Angle. Part # 1. Body: It is the [...]