Nylon Spur Gear for Spider Center Diff

[tc3_racer_001]

it was looking promising.. :(
is there any other options for hyper spiders?

[_paralyzed_]

just get a hardened pinion? Or harden your own by heating it to glowing and quenching in oil.

[tc3_racer_001]

Originally Posted by _paralyzed_

just get a hardened pinion? Or harden your own by heating it to glowing and quenching in oil.

hi there paralyzed, ive got an oxy welder at school, that i could easily heat up a pinion. this would make it much more brittle though, would cooling naturally be better, just leave in in a vice or something or would oil be better... not exactly great at chemistry, i just know it becomes really brittle!!

would it be suited when using a metal spur or what?

sorry for these questions,
ryan

[lincpimp]

Depending on the material the pinion is made off, the heat and quench may or may not work. I use a torch, and 10w30 motor oil. Slowly heat it up till it is red, taking care to not melt the metal. I use a metal can with the oil in it. Carefully knock the pinion into the oil, be careful it will smoke and hiss! Do not try to grab it with pliers, as this can damage the hot metal. I use a vise, or anvil to heat on, the place the can next to it and tap the pinion in with a screwdriver.

Let it cool, and do it again. The second time will help harden it further. I had success with the emaxx internal gears that I made into pinions, but they are decent steel that can be hardened. Trial and error will show if you pinion is made of decent material...

[tc3_racer_001]

are certain brands better than others? are rrp and good? hpi? those 2 are the ones available @ my lhs... also, are mikes ones suitable to do it with? i think id just let it cool slowly, then redo it. or is it needing to be cooled quickly... thanks:)

[lincpimp]

The quench in oil give it the hardness.

For the price, just get a hardened pinion from mike. They are rr pinions, and are extra hard. They work fine, and will last.