Fast and unexpensive tri-bearing upgrade

[karabas]

I printed ABS covers and short PLA bearings.
Currently only upper "tri-bearings" replaced
No more 1.25мм spaced "traces" on detail's vertical walls
OpenSCAD file attached.
PLA bearing is from thingiverse.

[jcugnoni]

Hi,

This looks great. I have also significant play with the stock plastic bearings, even when fully tightened.. so I am definetly interested in such upgrade. It would be great if you could post the stl files or cad files..

[karabas]

Hi,

This looks great. I have also significant play with the stock plastic bearings, even when fully tightened.. so I am definetly interested in such upgrade. It would be great if you could post the stl files or cad files..

http://www.thingiverse.com/thing:23402

[jcugnoni]

Thanks a lot, I will try it as soon as possible !

[jcugnoni]

Hi again

thanks for the design: I have printed several parts with 12mm length x 6.5mm internal diameter toothed linear bearing replacement that fit perfectly (http://www.thingiverse.com/thing:18219, edited the Openscad file to have 7 teeths, ID=6.5, length=12).

Because of the significant play that I had on the X-Axis tri-bearing I had to drill the printed bearing to get the final internal diameter, but now it is moving very smoothly with no play!

Great upgrade. I don't know how durable it is but it is a perfect transition until I design and print a LM8UU linear bearing upgrade for X and Y axis. I think that I may leave the Z-axis like this as it does not slide much during operation and is more tolerant to friction on the linear guides.

Update: first prints with upgraded X and Z axis bearings. The prints are just working so much better now without play!
Next steps: upgrade Y axis too and move to the idler ball bearing mod.

[tom10122]

awesome, guys is there any need to do this to the 2 bearings?

[jcugnoni]

Hi
I would just recommend to upgrade the triple bearing blocks of x axis (left+right) , yaxis (front+back) and z axis (top left+ top right). So 6 bearings in total.
It is however important to upgrade both sides of x/y axis bearings as it is the only way to prevent rotation of the carriage.
For me the most important change was seen on x axis.

[tom10122]

just "upgrade" my x-axis, it was relly skewed so i printed a couple layers of the bearings at a time and "welded" them together, i printed the carrige but it the part that help the bearing didn't come out well eith because of skew so i did some more welding there, printing a new cover now with my make shift bearing fingers crossed , knock on wood.

[goingdead]

Thanks for the info guys, meet the same problem here