pic: Introducing BarBox: My First Attempt at Gearbox Design

[bardd]

Originally Posted by sentientfungus

Small nitpicky thing on your latest version-- the edges are looking rather sharp. Whether you're planning on manufacturing it or not, it's best practice to design for manufacture, and nearly any manufacturing method that you would use in competitive robotics is going to need to have some sort of radius where you're cutting. I personally design most of my practice stuff to be manufactured with a 1/2" endmill because our primary machining sponsor uses CNC mills.

I took this into account. the edges do look sharp, but that's because of the render's angle. In reality I planned radii for the corners, so the whole thing can be milled with a 0.2" endmill.

Originally Posted by Adrian Clark

Why is this necessary?

And a note on standoffs: It's very hard to find .375 OD tube with #10 clearance ID. Rather than buying .375 rod and drilling it out I prefer to buy .0625 wall with .375 OD and put .0625 deep counterbores in the plates to capture the standoff. Makes things much lighter and simpler to make.

The different sizes are necessary because of the shaft's shape: the back end is 0.375" and round, the front is 0.5" hex. The fitting bearings for each side are different in size. I could change the shaft to allow using the same bearing, but then it'll have to be manufactured instead of just buying it from andymark.
As to the standoffs, I didn't actually consider how to make them... I'll look into it.

Thanks for the comments everyone!