pic: Modular Gearbox

[Ari423]

Originally Posted by Monochron

If you remove the collars from the inside you could replace them with a spacer so that the bearings (with their flanges on the inside) are flush against spacer or gear. Make the spacer long enough so that it presses against the gear and the gear presses against the other bearing. Doing that, you would only need a bolt/washer combo to retain the shaft axially if it isn't already held stationary by something else.

That's a really good idea that I hadn't considered. With your suggestion, I was able to reduce single block to 1" wide, .125" wall and the double block to .75" wide, .100" wall. The 1 CIM gearbox is now 2 lbs and the 2 CIM gearbox is now 4 lbs (without motors). That makes the whole 2 CIM gearbox 2.75" wide.

Updated CAD models are at https://workbench.grabcad.com/workbe...ulyGgP-1FFgvMU

The other big problem I can't figure out how to avoid is that the CIM motor needs a trimmed shaft and a spacer (could be CIMcoder) to fit in the thin stage. I was really trying to not need any machining after the blocks are CNC'ed. Does anyone have any ideas how to get around this problem?