The parameters for teeth are many and its a bit of a minefield. Most gears
these days seem to be made of a crappy form of Nylon and lose teeth. If they
are to be custom made, say for fixing a curtain closer etc, then it might
be good to get them made from something more robust.
Or are you refurbishing an Aerial Rotator?
Brian

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The Sofa of Brian Gaff...

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"Gareth's was W7 now W10 Downstairs Computer" wrote
in message ...
What's the favoured approach to getting hold of gears,
to cut them yourself, or to buy from, say, HPC gears?