LM8uu bushing for Prusa i2, i3, Air2...

by avalero, published

LM8uu bushing for Prusa i2, i3, Air2... by avalero Mar 5, 2013
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This is a simple but strong lm8uu linear bearing holder for the y axis for 3d printers.

This part is printed standing up, so it is very (really very) difficult to break.

The internal diameter is slightly smaller than the bearing diameter, so it will remain quite tight. I recommend to print with ABS, which is elastic enough and will remain quite strong. Maybe PLA is not enough elastic.

It has very small clearance, so it fits the Prusa i3 frame (the version with bushings on the y axis).

Design is parametric. It can be easily changed to LM10uu or other linear bearings.


This thing is designed using OOML ( iearobotics.com/oomlwiki ). If you want to print it just download and print the STL.

If you want to modify it install the OOML (instructions on the wiki) and compile using cmake or your favorite build tool

Source code of this and other things can be found in github.com/avalero/3dthings

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Thankyou - these have really firmed up my print bed (I always hated the cable tie fixings) - printed in PLA 0.4mm - works perfectly

Printed in PLA, .2mm, 30% infill. Bearings fit perfectly into the slots but the screw hold were not 20mm on center unfortunately. Not sure if I need to print at 103% to get the spacing correct but then I'll be worried about the bearings being loose.

Exactly what I was looking for. Thank you so much!

I printed three in PLA for the Mendel i am building, design is perfect, good fit, thank you for posting this!!! it work great!!!!


Note: the hole spacing is 30 mm

I take it you use Y-bearing holders because you don't have the ali frame with cut outs? Or is it that you didn't like directly using cable ties?

That's my case. I don't have the cut outs for the bearings, and in any case I feel it is more secured this way even if I had the gaps for them.