10 Pcs LM8UU Linear Ball Bearing 3D Printer Replacement LM8UU Bearing 8mm Shaft Linear Bearings for 3D Printer

Despite the other review I thought I would give them a go on the off chance because they were at an excellent price compared to other listings. Pleasantly surprised that these fit perfectly on a 8mm rod and replaced my current LM8UU bearings- I will admit initially they fell slightly stiff to move but I just ran them vigorously by hand on there own one at a time along the 8mm rod twisting them while doing so for around 10 seconds and they were fine.(also added a bit of lube at this time).Using on a 3d printer and they are Smooth , quieter than ball bearing linear bearings and fit perfectly in place of any LM8UU bearings.

Too tight to move one bearing by hand with three bearings fitted the extruded head wouldn’t move jammed could barely move clamping printer down and using two hands to TRY and move printer head.Bearings were the correct item exactly the same markings on them as the worn ones I had.I spent an entire day trying to free up the bearings, while after a while I was able to start to move the head by a single hand while still holding printer down with the other but the motors couldn’t move the head.I had to put my original bearings back in. This purchased filled under subject “dustbin” couldn’t return for refund as I tried many different things to free them up to become usable meant they were no longer returnable as new

30% less noise on my flashforge creator pro