topfuelcar

iTrader: (2)

Delete pls

ThePanda

iTrader: (68)

Deleting defeats the ability for it to be utilized by others in the future.

shannow

iTrader: (1)

That's impressive on the photos !
What do you mean by both spur and pinion are metal ?
Never use aluminium to aluminium ! It's friction coefficient is about 1.4 to 1.9!! Your car tyres will slide on the road way better than aluminium to aluminium.
A long time ago I made a valve in aluminium against steel on a flame gulping machine my god did it stick when the steel was coated with aluminium with wear. Like rubber on a sheet of paper !