This version of the LM8UU bearing clamps for the Y-axis (print bed) is modified to fit Prusa MK3.
The differences from the source model (https://www.thingiverse.com/thing:1848700) are:
- This model is cut down in order to pass over the V-cuts in the frame of the MK3.
- Unlike on MK2, the Y-rods holders of MK3 are not obstructing the bearing holders any more, so now you can use the same model for all 3 bearings.
There are 2 variants:
- For a grooved version of the bearings.
- For a smooth (non-grooved) version of the bearings (for DIY PLA printed bearings with a smooth metal tube shell).
Use M3x16 screws with hex socket drive. Longer ones will be hitting the V-cuts on the frame, and the shorter ones will not provide enough grip. No nuts required.
Mount and tweak the bearings using a spare rod, or just do it before you fix the Y-rods to the frame.
- Align the bearings and use a rod to align them perfectly.
- Place the clips and tighten them just before the point where the tension starts affecting the movements of the rod.
- If you notice that after tightening screws the rod becomes more difficult to move, release the screws and ensure that the bearings are aligned.
- Repeat 2 and 3 until you get the best tension where the rods are stil free to move.
Do not overtighten the screws, or you will destroy the threads on the plastic clips, so you will need to print new ones. Printing an extra spare clip at the beginning might be a good idea.
IMPORTANT: Print in PETG or ABS using 6 perimeter shell to prevent wear-out.
NOTE: The photo shows my custom LM8UU PLA core bearings (https://www.thingiverse.com/thing:2202854 with 8.15/13.22 mm diameter and 10 teeth) in 15mm/1mm aluminum tube shell.
- 6 perimeter shell
- ABS or PETG