Plastic/brass gear cutting

This topic has 7 replies, 5 voices, and was last updated 26 July 2013 at 11:07 by Knurler.

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24 July 2013 at 22:22 #125370
Knurler
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@knurler
Hi all

i own a Myford Super 7 and a Seig X1L and would like to be able to cut small gears in plastics and brass. (The ability to cut in other metals, would be welcome if it doesn't add significant extra cost.)

In order to do this I'd line some recommendations for a dividing device suitable for (preferably) both machines. I realise that, given the vertical space available on the X1 that this may not be feasible, so suggestions for each machine are welcomed. Any indication of cost for your suggestions would also be helpful.

Many thanks in advance

Knurler
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24 July 2013 at 22:22 #6797
Knurler
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@knurler
Advice on dividing devices sought
25 July 2013 at 08:11 #125377
roy entwistle
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@royentwistle24699
Give us some idea of the size of gear Tooth count etc Are they for Watches, Clocks, Traction engines or what?

Roy
25 July 2013 at 16:50 #125406
Thor 🇳🇴
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@thor
Hi Knurler,

as you say you need a dividing device – dividing head. If you want to buy one they are rather expensive if you want one with a worm and wormwheel. An indexer is of course cheaper but more restricted inits dividing capabilities. A cheaper way is to make your own. I made my own dividing head, and on the web you can find several descriptions, here are a couple:

Dean's simple dividing head, Tony's is based on a Taig headstock. I think they should fit your milling machine.

Thor

Edited By Thor on 25/07/2013 17:00:38
25 July 2013 at 17:23 #125411
Michael Cox 1
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@michaelcox1
Hi Knurler,

I have cut several gears using my X1 mill in aluminium, plastic and steel. For indexing I use a 100mm rotary table mounted vertically on the mill table. This rotary table has an MT2 socket so I use an ER32 collet chuck in the MT2 socket, and the gear blank is mounted on a shaft in the ER32 socket. This set up works well.

There more information, including making gear cutters on my website:

**LINK**

h ttp://mikesworkshop.weebly.com/improved-gear-cutters.html

**LINK**

**LINK**

Mike
25 July 2013 at 18:30 #125416
Michael Cox 1
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@michaelcox1
I have just seen that one of my links in the previous post is bad. Please try this one:

**LINK**

Mike
25 July 2013 at 22:42 #125435
Carl Wilson 4
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@carlwilson4
Hello Mike,

Many thanks for that post. I have posted elsewhere on this site about advice for making gears. The method you show for making the form tool cutter using cone drills is ingenious. You have given me much food for thought!

This forum is truly a mine of information what with all you talented Ladies and Gents and I'm very pleased I subscribed.

Carl.
26 July 2013 at 11:07 #125464
Knurler
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@knurler
Hi, all

Many thanks for the replies – and for the links, Thor & Mike – I hadn't considered making something myself, but the information in the links has whetted my appetite, especially since I know the whereabouts of a 'spare' Peatol lathe that I can probably lay my hands on fairly cheaply

Roy – it'll be mainly small, fairly fine-toothed gears – the sort of thing you'd probably find in small clocks, or inside , say, a modern printer or scanner -maybe up to 100 or 120 teeth

Once I've delved into the links I'll probably have lots more questions – so watch this space

Regards

K
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