pic: Bane Bots Gearbox CAD

[AdamHeard]

I'm curious why the sprocket is on the motor side.

Also, what are the specs of the initial reduction; with the commonality between the various Banebots motors and the FP motors, it seems it would be ideal to make this accept any motor (standardized pinion) and possibly multiple. What are you using as the motor pinion? The 15T 32DP from AndyMark seems to be the best choice on the market.

Originally Posted by Tom Line

I'm curious - why use the delrin on the sides rather than aluminum? Sure, it's half as dense, but it's also not as stiff and requires a thicker piece and is (in my experience) more expensive.

I've found delrin to be uniformly less expensive than aluminum plate of equal thickness.

Delrin actually works out rather well, you can leave it nice and thick (1/4" for example), not pocket it out, and still be rather lightweight (equivalent to a about the weight of a 3/32" aluminum plate). If the gearbox is designed correctly for the material, it is plenty stiff. A nicely pocketed 1/4" Aluminum plate is usually in the ballpark of a solid delrin counterpart, and the delrin will take less time to produce (you can cut it faster, and by leaving it solid, have less to cut as well).