Thread: making or purchasing chain sprockets

If you phoned up Blackwoods or checked in their catalogue (or firms in the yellow pages under 'power transmission') you'd probably find that they stock something very close to what you want. If you were in Adelaide I'd suggest Chains and Accessories (C&A) - they may be worth an email anyway.

Michael

they can be purchased from power transmission suppliers

You can buy them (Coventries for instance) as singles, but you need to make sure you know the chain pitch, etc

or you can make them - pretty much as you said, but be aware all teeth may require some easing with a file at the tips, plus some tapering

HTH
Des

Originally Posted by onthebeachalone

It's a bit complicated to explain how this is used but is it basically a ball-race, a bronze bush, some pinned collars and a nut, on a shaft with a sprocket that meshes with a length of bicycle chain.

The issue that is outside my experience is to determine the best approach to getting the sprockets. Are they normally purchaseable, ex stock, in small quantities?

If using bicycle chain its seems to me that a bicycle sprocket would mesh with the bicycle chain.
If you are on a budget-and isn't everyone ?- the solution would seem to be the quickest easiest and cheapest.Even cheaper, check out the (no its not a pun ) recycle centers for old bicycle sprockets.

Grahame

If the sprocket is an odd ball size, have the profile drawn up in a cad package, then have them laser cut out of ms plate.

There will be many members on this forum who could draw them up and supply you with a dxf file. All that will be required is the chain pitch, width, No. of teeth and hub details.

Easy peasy I reckon.

Ken

Originally Posted by neksmerj

If the sprocket is an odd ball size, have the profile drawn up in a cad package, then have them laser cut out of ms plate.

Good idea. I can do the CAD stuff myself.
Part of my original question was about material. Is mild steel likely to be OK for a sprocket? It wont be subject to heavy or continuous use.

Thanks to all those who have replied with a range of suggestions. It's been a big help.

Do you have to purchase chain as well? Is there another sprocket that the chain is driven from and do you know the pitch of chain?

If you need chain I may know of some that is cheap but types are limited.

Nev

This will help you work out the type of chain. There's also metric but I would think you have one of these types.


http://www.transeals.com.au/catalogu...e-Imperial.pdf

Oh, and there's Mergard Engineering at Geebung who will probably have what you need. Bought roller chain from them before.

Nev