Tuning Up Cheap Chinese Linear Bearing

Cheap linear bearings to upgrade my 3D printer to the BLV Mod
AND NO! NO WD40 WAS NOT USED ON THE BEARINGS!!!
Replacement bearings
3/32" Inch Chrome Steel Bearing Balls G25
goo.gl/FTEvtH
Linear Guide MGN12H Bearings
www.aliexpress.com/item/12mm-...

[@pedroikkan]

My problem was the size of the balls. I had to measure one by one and take out the big and smaller ones

[@nathanpuffenbarger5423]

I was an FC 2010 to 2016 just got into 3d printing this year..

[@De13333]

I used brake cleaner to degrease my hiwin bearing. Also works great.

[@noanyobiseniss7462]

Just found seven on the floor, thought I was only missing SIX !!!!

[@metricdeep8856]

Reality Montra "You buy shit, you got shit." I get that sometimes you can get by with substandard stuff....but you never get good stuff for junk prices. Never.

[@DSK349]

Not sure if you're still responding to comments on this, but does it make sense to replace the balls in these with ceramic balls? Obviously that puts you with not cheap rails anymore, but theoretically, you should never have to perform any maintenance again right? No lubrication would be the least amount of drag too if that makes any difference.

[@ericscholem6629]

Do this without disassembly:

[@cSSprOo]

great video, straight to the point and very informative!

[@gushhnet]

These are not meant to be adjusted in any way? once wear sets in you are meant to replace the entire bearing? thanks.

[@user-lx9jm1wo3h]

Another thing to be careful of is the end of the rail where it was cut in the factory. The cheap ones may have sharp edges at the very end where it was cut, so there might be a slight lip right where the bearings slot into. I put one bearing on my rail before removing any sharp edges or burrs at the end of the rail, and that seems to have put a small nick in one of the bearings so it has a small flat causing a lot of noise. I used a wire brush to smooth the edge of the cut, and the 2nd bearing was just fine.

[@whywouldyoucareaboutmyname6610]

Why would my bearings pop out every single time I go to put the guide back on the rail? I tried doing it upside down like you, tried putting it on slowly, tried putting it on faster... every single time one or more bearings pop out🤦‍♂️

[@lupofroi]

Do you think you could use contact cleaner to clean this decently without disassembling?

[@worstcat8489]

Hooyah brother - great instructional.

[@nickoutram6939]

Lovely and smooth, makes you wonder why the chinese fill them with so much junk... I watched a similar video using 'skateboard' (radial) bearings.

[@pwilkutowski]

Really good video, im just about to try this on a china Special linear rail

[@iforce2d]

hmm.... I don't think the goal is to have them sliding really freely

[@Stoneforth]

meh, i didn't see any reason to clean the bearings that came with my cnc router; they came with a grease nipple and with the sort of grease they suggest to use, it's not supposed to slide that freely anyway. I did loosen and tighten the seals for installation though.

[@DavidSmith-ex6bg]

Excellent video well explained thanks ….

[@hechuan5075]

Hello sir. I loved the video and did what you did. but I made the mistake of mixing the ball bearings.. now when its assembled. its stuck, very hard to move it up and down. What can I do? the rails actually came super loose. able to slide on its own from 1 end to the other

[@nicolasmatthysen7267]

I was replacing the bearings in my Mono X rails and dropped some. I've ordered some replacement bearings but I'm unsure how many are supposed to be in each channel in the stock carriage? Don't want to put too many in or it'll bind. Any help would be appreciated