Threading; Change Gears - Little Machine Shop Mini Lathe User Manual

Chamfer

Threading

Much of the mechanism of your lathe is provided to allow you to cut threads.
Your lathe can cut a broad range of thread pitches. In fact, with the standard
change gears, you can cut many more thread pitches than those shown on the
table on the lathe.

Change Gears

The series of gears that drive the lead screw are called change gears because
you change them to turn different thread pitches.
There are 4 positions for the change gears, commonly called A, B, C and D.
A This is the top change gear position. When you received your lathe it had a
20 tooth metal gear in this position.
B Gear positions B and C are on the same shaft, between positions A and D.
Position B is the inside gear on this shaft. When you received your lathe it
had an 80 tooth plastic gear in this position.
C Gear positions B and C are on the same shaft; between positions A and C.
Position C is the outside gear on this shaft. When you received your lathe it
had a 20 tooth metal gear in this position.
D Position D is the end of the lead screw. When you received your lathe it had
an 80 tooth plastic gear in this position.
Taper
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