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

[florianz]

Originally Posted by Ryu James

where would i get this type of carbon?

i think i am just gonna leave this to a professional shop to do but just curious.

is the hardening process what gives it that black coating? cuz that i show my other mod1.5 gears are.

have it done properly. after that you can be sure that it works. It took you some efford to get the right gear, so it's worth to take it to the shop.

the steel has to have at least 0,2-0,3% carbon to get hardened like that. It's a process on (at least) the surface of the material, it doesn't get the carbon from the oil, you can also take water (wich needs additives due to the boiling).

afterwards it needs "annealing" or tempering, that's what you usually do after hardening, the surface is just too hard and like glass. annealing makes it kinda "flexible". that's what they do with alloy after welding to get rid of tensions. eg. cannondale (bicycles) do it like that.

That's the usual process when hardening knives; when you miss out on annealing, the knive breaks like glass.