3dfused Linear Rail Improved Belt Clamp

Like most of the parts on 3Dfused.com’s linear rail kits, the belt clamp sucks. They used regular nuts inside of a pocket, with no mechanism to keep them from coming loose. After a bit of printing they can loosen off and create backlash artifacts in your prints. Then you have to remove your bed at minimum to get in there and fix it. Ugh.

This improved version replaces the pockets for regular nuts with sockets on the bottom for M3 Nyloc nuts. It’s also straight through and more forgiving to bolt length, where the other would break if the bolts are too long.

I recommend printing this at 5 perimeters (so you have plenty of walls between the nut and the plate) with 30% infill. Tighten as tightly as you can get by with (maybe even using a thread locking compound like Loctite) as you don’t want this to come loose or have any play at all.

Enjoy, source file included as always.