> John R. Lupien writes>
> > Gears are easy - you can cut them on most lathes, without any CNC. Cams,
> > cranks, & so on are much tougher.
> You can cut gear BLANKS on a regular lathe. To cut the teeth, you need a hob.
> A simple straight-cut gear you could do on a milling machine with an
> indexing head and a mill shaped to fit the required profile.
I made a nice straight-cut gear on a lathe, it really was easy.
Cutting the blank is the hardest part. To cut the teeth, you use
this many-toothed rotary cutting device that clamps onto the
screw thread drive. They have both straight-cut and helical
tools for this, I think, though I have only used the straight-cut
version.
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John R. Lupien
lupienj@wal.hp.com
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