LM8UU Linear Bearing Puller

thingiverse

I created this tool to extract the lm8uu linear bearing from my Monoprice Mini Delta carriages, and it also worked well for seating new bearings by pulling them in. It should be adaptable to other configurations using lm8uu linear bearings, but may not be strong enough for bearings pressed into metal blocks. In addition to printing these two parts, you'll need a 110mm long bolt with a hex head, a fender washer, and two nuts. A 4" long 1/4-20 bolt should work well, but you might need to adjust the fit by changing the nut size or thread type. To use this tool, start by placing a nut, then a washer, followed by the puller on one end of the bolt. Insert the bolt through the bearing and secure it with a nut and a final nut. Hand tighten everything before holding the bolt head steady while tightening the adjacent nut down to extract the bearing. If you're using this tool to seat a new bearing, you might need a longer bolt if it can't be pushed in part way by hand. These parts were printed at 0.21mm layer height and 40% infill with eSun PLA.