pic: Dual FisherPrice Gearbox

[Cory]

Looks nice. I would make one reccomendation-replace the bushings with bearings. You're going to have very high frictional losses, especially in the beginning stages where the speed is extremely high. I really don't think it's worth it to save such a small amount of weight. Also, how are you using the FP? in an AM planetary? DeWalt? It looks like all your gearing is 20 DP and would give you ~100 rpm if you were using a CIM, so I'd assume you aren't just mounting the motor straight to the gearbox.

I think someone else mentioned recently that they used the Igus bearings on a high speed application, and they failed because they aren't rated for over 2000 rpm, or something.