Bearings in my Anet a8 printer was very poor quality. This was lowering the print quality, so I've decided to replace them with something better.
First I have printed bearing blocks instead of the aluminium ones, because they do not fits lm8uu bearings well. This was better, but not excellent.
Then i have tried printed PLA bearings available on thingverse, but it was a failure too.
I saw bearing block then. It is a smart idea, but none of projects available do not fit my needs. So I have decided to make my own model of bearing block.
This model is a lm8uu bearing replacement ( 8mm shaft bearing with block):
- size is almost the same. It should fit everywhere when original bearing block fits.
- should fit large amount of bearing models up to 3x8x10mm ( for example 623zz, R2-5ZZ, and lot of others)
- It has a backlash compensation, so u will never has unwanted clearance between shaft and block
- backlash compensation can be done by two springs or by a rubber printed dumpers (stl included)
- it is far lighter than original one
- just some cheap small bearings are needed, m3 screws and m3 spacers
Test it and tell me what you thing.
This looks like complicated model to print, but it is quite easy one :).
- This is for 3 bearings
- Just print as low layer height as you can.
- if You have smal nozzle like 0.3 or less then use it
- Print very slow.
- There is a little bridging over there (but very small ones), so cooling fan may be needed.
- No supports needed
This is a second version of bearing block. T
he first one is here Both works well, just a little different design and some minor improvements:
10mm version is now available too:
Materials needed (BOM):
- 3 bearings (623ZZ or other 10mmx3mmx4mm) - 10x4x4 will work too, but beed enlarge the bearing mounting holes
- 2x M3x10mm screws, 4xM3 spacers, 2x m3 nuts (main bearing shafts)
- 1x M3x16mm screw, 2xM3 spacers, 1x M3 nut (arm bearing shaft)
- 1x M3x16mm screw, 1x M3 nut (arm mount)