pic: First Sheet Metal Drivetrain CAD

[AustinSchuh]

Originally Posted by z_beeblebrox

As per Joe G.'s advice, the gearbox is now two plates. The lightening pattern is improved and an access hole for the outer tensioners is added.

What tolerances can your shop hold on bends? I'm not sure your gearbox is going to mesh with your wheel correctly. You have the bend tolerance of the frame + the bend tolerance of the gearbox. For our shops, I would realistically say that that is +- 20 thou. For a gearbox, you want to hold +- 1 thou on c-c. 971 does this with a dowel pin and a tight tolerance slot in the gearbox plates. That makes it so the laser ends up holding all the tolerances, giving us essentially +- 1 thou on the c-c for the wheels.

I've found it really nice to have a square cutout above our wheels, and cutouts in the frame big enough for hands. That makes it really easy to see how your wheels are wearing, and to get your hands inside if you need to do something.