1. Other Lathe Operations

2. Drilling Boring Reaming Tapping
Internal Hole Making
Drilling
Boring
Reaming
Tapping

3. Drilling
Tailstock
jacobs chuck
taper shank drill

4. Boring
Enlarge or True an existing or drilled hole

5. Correct boring tool position

6. Incorrect boring tool positions

7. Boring tool size

8. Types of boring bar operations

9. Internal thread relief

10. Long bar length creates chatter

11. Reaming

12. Reaming Accurately finish drilled or bored holes to size
Held in tailstock
holes drilled to .010” to .015” undersize then reamed
Reaming speeds are half that for drilling
Reaming feeds are twice that for drilling

13. Tapping
Drill press
larger holes
less accurate

14. Starting Taps - Lathe
smaller holes
more accurate

15. Hand Tapping with lathe
Center Drill
Drill Hole (use oil)
Get tap and tap wrench
Disengage spindle gear
NO POWER
Rotate spindle by hand to start tap
Move to work bench

16. Grooving and Parting

17. Knurling - uses improve appearance provide good gripping surface
increase size for press fits

18. Knurling tools
Most knurls displace metal by pressure (soft metals)

19. Knurling tools

20. Knurling Tips Use oil Hold between centers
Use low speeds (as for threading)
Even pressure on both rollers
Don’t stop lathe while in contact