black torque tube autorotation gear fit?

[gt48]

My buddy has an 600N super pro which uses the white torque tube front gear (H60121). It's lost a tooth so he needs a new quickly (to break in a new engine for the Toronto funfly). Will the black one (H6NG001XXW) work? Both are .6 mod.

[nmdesertracer]

yeah it will work just installed a set yesterday.

[gt48]

Cool, thanks for the info.

[meowguy]

I don't know if I was hallucinating or something, but I swear the black umbrella gear only fits properly in the bearings one way. That is if you remove the bearings from the plastic case to remove the white umbrella, make sure you keep them in the same place when you put the black one in. The black umbrella will be a loose fit in the bearings if you do not do this properly. This was true on the 550e which I have and the gears are identical except the pinion gear has 34 teeth on the 550e instead of 40 on the 600. The umbrella is the same on both.

It was really very weird because the two bearings appear identical. But you can feel the difference if you reverse them as there is noticeable side play if done wrong.

[gt48]

Originally Posted by meowguy

I don't know if I was hallucinating or something, but I swear the black umbrella gear only fits properly in the bearings one way. That is if you remove the bearings from the plastic case to remove the white umbrella, make sure you keep them in the same place when you put the black one in. The black umbrella will be a loose fit in the bearings if you do not do this properly. This was true on the 550e which I have and the gears are identical except the pinion gear has 34 teeth on the 550e instead of 40 on the 600. The umbrella is the same on both.

It was really very weird because the two bearings appear identical. But you can feel the difference if you reverse them as there is noticeable side play if done wrong.

Thanks, meowguy, I've let my buddy know to watch for that.