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Gallery, Projects and General => How do I?? => Topic started by: almost fits on March 10, 2010, 07:54:20 AM

Title: 12 tooth 6mm pitch sprocket
Post by: almost fits on March 10, 2010, 07:54:20 AM

Hi , I am in need of a 12 tooth 6mm pitch sprocket, I think I may be able to make one, but first I wonder if anyone can give me some advice on "how To" in order to see if my idea is on the right lines.
Thanks
Almost fits

Title: Re: 12 tooth 6mm pitch sprocket
Post by: John Rudd on March 10, 2010, 08:26:58 AM

What diameter?

Title: Re: 12 tooth 6mm pitch sprocket
Post by: John Stevenson on March 10, 2010, 09:25:13 AM

If it's 12 teeth and 6mm pitch it can only be one diameter.
It will have a pitch diameter of 0.915" and an OD of 1.064"

John S.

Title: Re: 12 tooth 6mm pitch sprocket
Post by: almost fits on March 10, 2010, 09:27:37 AM

Hi, I think the diamiter will be set by the number of teeth and the pitch ie 12X6mm = 72mm circumference, this would be the line to drill the 12 4mm (the dia of the chain rollers) 6mm apart (on an oversized disc) these holes would then be opened outward to form the teeth - I think (hope)!!

Almost fits.

Title: Re: 12 tooth 6mm pitch sprocket
Post by: almost fits on March 10, 2010, 09:31:44 AM

Thanks John, i aint got around to working it out so precisly.

Almost fits

Title: Re: 12 tooth 6mm pitch sprocket
Post by: John Rudd on March 10, 2010, 09:36:19 AM

Quote from: John Stevenson on March 10, 2010, 09:25:13 AM

If it's 12 teeth and 6mm pitch it can only be one diameter.
It will have a pitch diameter of 0.915" and an OD of 1.064"

John S.

Of course  :doh:  What was I thniking? :scratch:

Title: Re: 12 tooth 6mm pitch sprocket
Post by: Bernd on March 10, 2010, 09:51:02 AM

I'd make one out of a piece of plywood or plastic sheet. Even some thin gage sheet metal might work.

Bernd

Title: Re: 12 tooth 6mm pitch sprocket
Post by: almost fits on March 11, 2010, 02:47:04 PM

Thanks Guys, things have moved on a little since I posted this question, my supplier has come up with a ready made sproket - which will save me a lot of time,--but I may still make one- just to see if I can!!

Almost fits