ORIGINAL: canniscam
ORIGINAL: GTX SlotCar
ORIGINAL: canniscam
As a matter of curiosity, what would prevent someone from making a CNC milled metal main gear? ...
In any high speed application, the main gear (spur) must be softer than the pinion or it'll tear up the pinion. This is also true on r/c cars, slotcars, anything.
I'm not sure I would even attempt to have one made, I was interested more or less in the physics of it. This is definitely a helpful tidbit, I've never had a solid grounding in gear components, so RC motors / pinions / main gears are proving to be a educational experience.
Thanks for the heads up.
Casey
Pinions on the motor are an alloy mixture of brass and bronze. They're harder when combined but not too hard. Bronze it's self is very hard, brass is very soft so they combine them to get the right hardness for the pinion. Aluminum is the sme way...alloyed to a specific mixture for desired hardness and corrosion resistance. Aluminum can be heat treated to make it harder in addition to the alloy mixing (example...6061-T6) where T6 is the degree of heat treatment I can tell you....T-6 is pretty hard stuff. Metalurgy class is now in recess (LOL).