Rectangular Flanged Linear Ball Bearing (LMK10LUU)

Rectangular Flanged Linear Ball Bearing (LMK10LUU) with PTFE inserts. 

I made these LLU bearings because the initial bearings that come with the stock Ender 5 are not great, So why not make your own? The idea is that the linear rods slide using small metal bearings. Here instead of metal bearings inside you insert PTFE tubing in the guides and this allows a more friction-less motion on the linear rods on the Ender 5. PTFE actually is self lubricated so you will never need to lubricate these. Test it out and see how it works!