brushless 1/5 4wd conversion about to begin! couple questions.

[Ryu James]

Originally Posted by KaztheMinotaur

This sucks. They changed their web site. The hub & set screw option isn't offered now. I hope they changed it in the last day or so since you contacted them.

How deep of a hole did you have machined out of the gear? I think it needs to be 4mm deep to have enough of the shaft sticking out the other side to fit on the bearing.

I'm going to a machine shop this morning.

What size set screw did you use in the pinion?

i had 6mm machined out of the spur gear. 6mm is ideal cuz it allows the shaft to protrude far enough through to sinc up to the bearing right but also leaves 1mm of space between gear and bearing so it freely spins. 6mm worked perfect imo. you could go 7mm and then have 3mm thickness which is same as stock and then take off 1-2mm of the entire gear so the gear is only like 8mm thick instead of 10mm. this would shed weight but cost more.

as for the pinion i used a 6mm set screw. if your machinist is like mine and doesnt have metric stuff tell him to drill a 3/16" hole in the pinion for a set screw and then the 6mm tap works perfect.

i have been using this guide for my own tapping and drilling. your machinist will have the same type of chart.
http://www.imperialinc.com/pdf/I_Tap&DieChart.pdf