Re: [CAD_CAM_EDM_DRO] Cool Worm Gear

That sounds good. It seems the real trick is indexing the gear blank
with reasonable precision. I suppose a spur gear with the correct number
of teeth could be used, or a small indexing plate with the appropriate
number of holes drilled.

That last would probably work pretty well if you used your mill and
DRO (or CNC mill) to make it up.

Wouldn't you have to tilt the gear blank to get the correct lead angle?

Paul

>
> I have seen a method for cutting worm gears that looked real interesting.
> The gear is held on the lathe carriage in a manner that you can index it for
> each tooth. The gear is heldhorizontal so it's centerline is inline with the
> center of the spindle. A boring bar is paced between centers with a tool
> ground to the worm profile. The gear is fed across this tool using a
> threading operation that is the pitch of the worm, using the cross slide to
> set the cutting depth. This generates the correct tooth profile. I hope this
> explination is good enough to understand, if not I'll have to try and draw
> it up.
>
>
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--
Paul Amaranth | Rochester MI, USA
Aurora Group, Inc. | Systems & Software
paul@... | Unix / Windows / NT