pic: High Reduction 2-Stage Gearbox

[Bryce2471]

Great design! I have thought about making a very similar ball shifting gearbox.

Originally Posted by Cothron Theiss

Do you mind explaining or posting your Lewis Gear calcs? The formulas and calculations themselves are kinda configurable, and I've run into issues not including all the necessary factors. My opinion on 32DP gears is that they're great for the first stage, but a little iffier on second stage, especially with 8" wheels. I would also caution against an aluminum pinion on the second stage since you're running 8" wheels. I've never actually run a 32DP gearbox so I'm hesitant to use it throughout a high-torque gearbox. But if you think the calculations are all good, I'd love to see how it turns out.

It looks like the first stage is 32dp with steel pinion gears from andymark (Just a guess). But the second stage looks like standard 20dp gears.