Mini Desktop CNC Z-Carriage 21mm Bearing Option for LM12UU
thingiverse
You may find your LM12UU bearings to be 22mm diameter instead of the standard 21mm diameter. Then don't print this part. This part is for the odd soul that has the 21mm LM12UU bearings and wishes to finish off his/her/its Mini Desktop CNC machine. My 21mm bearings dropped straight through the original after I took 18 hours to print the part. I hope this helps someone in time.
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