|495 forum posts|
I have a length of 3mm pitch roller chain and need two sprockets of 10 or possibly 12 teeth.
HPC gears list 4mm pitch as their smallest and a search on the internet doesn't reveal any other manufacturer of such a small chain or sprockets.
So over to the brains trust: any ideas on where to get the required sprockets?
|roy entwistle||17/04/2020 12:49:03|
|1459 forum posts|
can you not make your own ?
|586 forum posts|
I do not think 3mm pitch chain is made under any international standard.
Somewhat confusingly, 03B chain in an ISO standard is 5mm pitch.
say they can supply.
The only reference I found for 3mm pitch sprockets was for Chinese-made mini-motorbikes (pit bikes).
As Roy says, maybe make your own. Start with a decagon of 3mm side and go from there.
|John Haine||17/04/2020 14:27:34|
|4428 forum posts|
If you search online there's a website somewhere that says how to make your own cycle sprockets, iirc mainly by hand.
|586 forum posts|
Is it this one?
If you are at all CAD-minded, download a dxf of a 6mm pitch sprocket of the correct number of teeth and scale by 50%. Add a few centres for the rollers, print out, stick to blank, drill, saw file, done.
22017 forum posts
I suggested that in a recent post here
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