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Bill Marcy
(@bill-marcy)
Member
VXB Bearings

Can I use, and is there a benefit to using the VXB Brand 8mm Self Lubricant Graphite Brass Linear Motion Bearing LM8UU Type: Linear Motion Brass Self Lubricant Graphite Ball Bushing Material: Brass Size: 8mmx15mmx24mm

Link to Amazon listing

They look like they would be better as to orientation, but I don't know if this is something that has been tried and found to be useless or not.

Posted : 22/11/2020 1:29 pm
Ferly
(@ferly)
Eminent Member
RE: VXB Bearings

I ordered some IGUS ( https://www.igus.eu/product/990 ), but then I read this article https://prusacommunity.com/set-your-bearing-straight/ .  So I didnt install them. No idea how yours compare to the low friction IGUS. They look like they might have more friction than the IGUS.

Maybe is a data sheet available with friction values for comparison?

Posted : 22/11/2020 4:32 pm
Bill Marcy
(@bill-marcy)
Member
Topic starter answered:
RE: VXB Bearings
Posted by: @ferly

Maybe is a data sheet available with friction values for comparison?

Does this give you any information?

  • Coefficient for Linear Expansion: 1.9x10-5/C
Posted : 22/11/2020 4:36 pm
Ferly
(@ferly)
Eminent Member
RE: VXB Bearings

Unfortunately I do not know what those numbers mean. But I'm pretty sure they exist and hopefully a more technical inclined person can clarify those numbers for us.

Posted : 22/11/2020 4:54 pm
cwbullet
(@cwbullet)
Member
RE: VXB Bearings

IGUS works fine.  You have to watch how tight you tighten screws or you will impede smooth motion.  

--------------------
Chuck H
3D Printer Review Blog

Posted : 22/11/2020 5:25 pm
Ferly
(@ferly)
Eminent Member
RE: VXB Bearings

I will give them a try despite what the article says then. Having to disassemble the printer for maintenance regularly is the one I really dreaded.

Posted : 22/11/2020 6:11 pm
cwbullet
(@cwbullet)
Member
RE: VXB Bearings

@ferly

If either of you has good or bad results, please post an update.  I like having options.  

--------------------
Chuck H
3D Printer Review Blog

Posted : 22/11/2020 6:12 pm
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