1. Lathe

2. Lathe Tools

3. Lathe Tools, continued a “boring bar” lets you get deep
inside a part for making an inner
diameter (for holes larger than
available drill bits & reamers)
lathe tools are usually shaped
by the machinist using a
grinding wheel

4. Machining
Lathe tool

5. Machining
Rake angles form the surface that the chips pass over
Back rake angle angles are greater for boring

6. Machining
Relief angles prevent the cutting tool
from bumping into the work

7. Machining
Nose radius affects surface finish
Large radius increases power required
and tool chatter

8. Machining
Side cutting angle
The greater the angle, the more tool deflection
The smaller the angle, the bigger the chip and
more the tool will wear

9. Machining
Cutting oils
Extend tool life
Cool cutting tool
Cast iron can be machined without cutting oil
Aluminum requires cutting oil
All threading operations require cutting oil