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

[Ryu James]

Originally Posted by nitrostarter

The Etti's are extremely popular and well built! Lots of boaters use them with great results. The CS is pretty good as well.

do these esc's have brakes or not?

[KaztheMinotaur]

That gear is big. Seems like the whole thing could be thinned out,maybe 1/8, and then a smaller section out of the middle "counter sunk" where it botls to the locker.

Is that gear hardened?

[lincpimp]

Originally Posted by KaztheMinotaur

That gear is big. Seems like the whole thing could be thinned out,maybe 1/8, and then a smaller section out of the middle "counter sunk" where it botls to the locker.

Is that gear hardened?

The sdp gear will not be hardened. May be the only issue with it, depending on what pinion gear you plan to run. I would leave it full thickness, or only mill it down to match the teeth width on the rcm mod 1.5 pinions.

[KaztheMinotaur]

Yeah.

[Ryu James]

i am just gonna do like what you said Kaz and mill out the central area of the gear so that it sheds some weight and mounts up properly to the drive shaft but still is very wide. it is not hardened but i have to tell you it seems way stronger/harder than the gears that i have that are hardened. plus, there is a company here local that i could have harden it if needed but i dont think this gear is gonna have any issues. and acutually the rcm pinion is wider than this. the sdp gear is 10mm wide. i havent measure the rcm pinion but i would guess it is about 14mm wide.

[Jabe]

You realy need to get it hardened... its very easy to do if you have blowtorch, just heat it untill it starts to go from red to white then drop it in cold water and thats it.
You might want that spur last longer than pinion, so it should be hardened.
I have hardened HotRacing pinions and those last just long as other hardened.

[Ryu James]

Originally Posted by Jabe

You realy need to get it hardened... its very easy to do if you have blowtorch, just heat it untill it starts to go from red to white then drop it in cold water and thats it.
You might want that spur last longer than pinion, so it should be hardened.
I have hardened HotRacing pinions and those last just long as other hardened.

i dont think i have a torch that would turn this gear red. what kind of gas?

[brushlessboy16]

Originally Posted by Ryu James

i dont think i have a torch that would turn this gear red. what kind of gas?

you need carbon to harden steel...

You heat it up until it is red and non magnetic (going to have to check) then clench it in oil. then heat it back up and clench in water.

Using just water DOES case harden but not as well as added carbon.


See here
http://www.technologystudent.com/equip1/heat2.htm

[Ryu James]

Originally Posted by brushlessboy16

you need carbon to harden steel...

You heat it up until it is red and non magnetic (going to have to check) then clench it in oil. then heat it back up and clench in water.

Using just water DOES case harden but not as well as added carbon.


See here
http://www.technologystudent.com/equip1/heat2.htm

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.

[KaztheMinotaur]

Quench it in used motor oil.

[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.

[aqwut]

To harden gears, I thought you were suppose to heat it up and drop it into oil..

[aqwut]

Lookin' good man.. lookin' good...

[Overdriven]

Very nice, I'm jealous. And I wanna see a closeup of the brakes without the disc. I'm curious where the mounting holes lined up.

With your brake bias, your right you don't have to worry front to rear right now. But you do have to worry about left to right, as there is a diff between them. If it is off it'll probably be most noticable when you first apply the breaks, or when applying light to moderate pressure. The solid center diff will help even things out alot, as each wheel is not as independant. With your skills I'm sure it'll be setup pretty close on the bench either way. Keep it up

[KaztheMinotaur]

I got my 2215 today and "it's so big !"