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Number of teeth is not the only issue
Posted by Raul at 05/06/2001 7:01 PM EST
Engineer on team #111, Wildstang, from Rolling Meadows & Wheeling HS and Motorola.
In Reply to: 66 is the smallest I would go.
Posted by Joe Johnson on 05/04/2001 5:33 PM EST:
I would ask for 72,84 and 96 teeth.
However, it is also important that they use the right materials and gear thickness. Plastic gears will NOT do; we need steel or maybe brass. The thickness of the gear should be 6mm minimum to carry the dynamic loads.
Also, we need a useful hub design that can be mated to idler shafts. A max hole diameter of 6mm for the shaft will allow us the flexibility to drill/ream the hole to the shaft size we need. If the gear is solid, then fine; if it has spokes then the outside hub diameter needs to be at least 25mm.
Raul
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