pic: 2.5in gearbox

[Munchskull]

Originally Posted by Mechvet

Looks good so far!

What led to your choice of 2.5" colsons?

What gears are you using? I ask this because at smaller tooth counts for a more compact gearbox, you *might* be approaching the limit for some materials, such as aluminum. (note: I have done zero calculations for a smaller box. I'd suggest running some lewis gear numbers to see if you're inside the gear's envelope)

Am I correct in assuming that the two sprockets inside the gearbox mean this is for a WCD setup? If that's the case, how are you planning to mate this gearbox to the frame rail?

The gearbox would be mounted using the lower 10-32 bolts that would mount the CI'M motors, in total there would be 3 10-32 bolts holding the CIM motors and the gearbox on.

I used 2.5" where's because my personal philosophy is that the smaller the wheel you design for the small your gearbox can be. I posted this because I fear I am missing some torque related risks of small wheels.

The chain is #25 because small wheels should (if I did my math right) require less torque to move and rotate.

Are there any disadvantages of 2.5in wheels I may have missed? (assuming that high centering is not an issue)