Igus drylin RJUM linear bearings with alu casing

Having a look at the difference between igus RJUM bearings vs the more common RJ4JP low cost polymer bearings.

[connorhaughton]

To clarify, my understanding is that the standard all plastic igus bushings are intended to be press-fit into a precisely toleranced metal housing for them to assume their intended tightness on the rod. That's the reason many people find igus bushings to be very loose; they're not intended to be used 1 for 1 substituted for linear bearings. Most of the clamping methods found on 3d printers are suboptimal for this purpose; they might work, but will have increased play and reduced lifespan.

If you aren't going to press fit them into a machined part, it's much better to go with the aluminum sleeved versions, as they do not require any special mounting and can be directly substituted for LMXUU bearings.

[NicuIrimia]

Thank you for this test. I was thinking to get the metal jacketed ones but now I decided to go for the adjustable and also cheaper type.

[timroos]

Do you maybe have a link for that X-carriage?

[Martin-H]

Any tips on how to remove binding? I have the rjum for my hypercube but cannot get them to work properly, especially for the y axis, they bind a lot...

[mrcpu]

would've been nice if you'd included links/part numbers in the description. However, it was useful information.

[erdnuss.snackbox]

RJ4JP are not pressfit, RJMP are pressfit. RJMP & RJ4JP Bushes are not made for clamping but for circlips. Check manufacturer specifications.