ok, a bit of a strange post. anyone know where I can buy small gears, maybe 20 mm diameter? preferably in metal for locost price (say up to £5 per gear)

I am looking to making a small gearbox driven by speedo cable to increase its speed by a factor of around 2x.

RS components

Or if you can get your hands on an old electricity meter (house one I mean) they are a usefoll source

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Originally posted by v8kid
RS components

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Aren't most speedo gearboxes nylon these days? So the delrin ones might be up to the job.

Other than that brass ones from an old meccano set (i.e. this kind of thing from ebay ) or a model engineering place would be favorite.

What about these:
http://cgi.ebay.co.uk/Selection-of-Brass-Gears-O-Scale-Spares_W0QQitemZ280037622791QQihZ018QQcategoryZ47436QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

What about scalextric cars????? gears on axles and motor.

http://www.ondrives.com/

any good truck tachograph center would still have corrector gearbox's for old cable type tachographs, you would be able to specify the ratio you require.

www.hpcgears.com/

www.reliance.co.uk/

Both of those do a handbook catalogue, and do small gears, and racks and pinions, in plastics and metal.

Cheers,
Syd.

I can recommend reliance gear. they are based in Huddersfield I have used them for high precision machining for years. Really good. Gears are manufactured in their Irish plant. the people are really helpful

3 the same (27mm) from a clarke micro milling machine.

Any use ?