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Cutting gears on a lathe

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Dave Harding 1	16/03/2014 00:50:40
148 forum posts 4 photos	Is it possible to cut gears on a Lathe if so how would you do that.
Bazyle	16/03/2014 01:17:32
6956 forum posts 229 photos	Yes. Two major methods involving different approaches. 1/ the lathe spindle holds the cutter and the gear is held in some other fixture. 2/ the spindle holds the gear and is indexed round while a small additional spindle is used to do the cutting. Put google into images mode and then enter "cutting gears on lathe" and you will find a mixture of examples. Then add 'youtube' to the end and you get some more. Reading that lot should use up most of Sunday for you.
_Paul_	16/03/2014 03:52:01
543 forum posts 31 photos	Both Myford and Boxford had/have their own dividing heads designed for indexing on the lathe with the cutter then mounted between centres . Cutter mounted between centres setup: Toolpost cutter with gear blank mounted in chuck.
WALLACE	16/03/2014 07:19:43
304 forum posts 17 photos	Seem to remember in MEW there was an (to my mind) elegant way of hobbing a gear on a lathe by using a stepper motor to rotate the blank. Simple electronics (TTL divission) plus an optical coder was used to generate the 'locked gearing' between the cutter and the blank. W. I
JasonB	16/03/2014 07:25:42
25215 forum posts 3105 photos 1 articles	If your gears are not too large a tooth then you could also index the spindle and use a tool ground to the correct profile to plane the cuts much like a shaper, this is the principal on an internal gear
Bazyle	16/03/2014 10:02:48
6956 forum posts 229 photos	BTW are you talking about clocks or big stuff?
Ray Lyons	16/03/2014 17:38:09
200 forum posts 1 photos	Search for "Hobbynut" on Youtube. Here is a practical engineer who gives an excellent demonstration on gear cutting using the lathe and milling machine. The methods he describes could easily be adapted for making in the lathe with a suitable dividing attachment.

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