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Old Nov 18, 2004, 12:05 PM
billystiltner is offline
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United States, VA, Clintwood
Joined Nov 2002
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Watch gear gearboxes

Hey
I have started on a gearbox for some watch gears.
The watch gears I have look like the watch gear drive on Ralph Bradley's firefly.
The spur looks like the spur on Bob Bailey's Room flyer. The pinion has 10teeth and fits over a 4mm pager shaft with some reaming. The spur gear has 60 teeth. The best I can measure with a vernier caliper I get 7.7mm for the spur and 1.5mm for the pinion. Has anyone else measured these little watch gears with a dial caliper? I would like to get the measurements right before I design a gearbox.


Thanks
Billy
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