Re: Avo Douglas No. 6 winding machine - change gear needed.
Michael.
I have one of these coil winders. I've just meshed two 60 teeth gears together and measured the distance between their centres as 2 1/2", so this will be the Pitch Circle Diameter (P.C.D)
The Diametral Pitch (DP) is given by number of teeth divided by PCD. In this case 60/2.5 which gives a DP of 24.
Gears must have the same DP if they're to mesh together, so a 70 tooth gear will have a PCD of 2.917".
You'll know the thickness of the gear from the gears which you do have, so you should be able to find something suitable in the attached leaflet. No doubt there are companies in Australia selling similar items.
You could use an existing gear as a jig to drill the drive holes in the new one.
You'd be well advised to check my figures against your own gears just in case mine are different to yours.
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Graham. Forum Moderator
Reach for your meter before you reach for your soldering iron.
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