Drive motor options

[Liftoff]

My gears look different to the ones in your photo; they have a surface finish that couldn't have come from any milling or turning method I know of

Originally they looked like this:

HPI gear.jpg
I couldn't drill through it at that stage so I turned it on a lathe and cut a new face, that took the hardened piece off and I could just about drill it.
What type of drills did you get Nick, there are loads of different shapes carbide drills around! What worked for you?

[overkill]

Ah, now your gear looks exactly like mine. I used drills like this: http://www.mcmaster.com/#standard-drill-bits/=ql6bw5 and I am sure you can find the same thing locally in the UK or Europe. I tried facing one of these gears and only succeeded in ruining a carbide insert.