Reply to "UPDATE 3/7/17 WITH VIDEO !!!!!!!!!!! Niagara gears and drive shaft"

NortonOGR Forum Member

Just an update. I am fairly positive these gears are metric, .7 Modulus. The pitch diameter of the 13t gear is 9.1mm, the PD of the 19T gear is 13.3 mm.

Stock Drive parts has these gears in acetal. I could not find any in metal that fit this description at SDP.

The search goes on. A trip to the hobby shop yielded a 13t 32 pitch gear which proved to be too big. Others like me new to this stuff, pitch is a term used in english measurement and modulus is used for metric gears.

One other thing. These gears are clearly spur gears. The teeth are straight across. The 13t gear is used as a worm gear which compromises the contact area. Might be one of the reasons for the high failure rate.

Pete

12/24/152:41 PM

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