Improving dirt cheap linear rail guides & blocks 

You can replace the first one with real 3/32 ball bearings from a hardware store. Clean and grease and it will take care of a lot of wobble or play. Brake clean is my go to for cleaning. 3 in one makes a great grease to use. Phyfe is ok but grease works better and more quiet. Great information to share buddy. Thanks for helping

I recently got a set of linear rails for my Neptune 3 Pro, they were pretty rough. Polished them with red scotch-brite on a dremel to get most scratches out, hit them with some lapping compound, cleaned the bearings out, but still had binding, had to removed 2 bearings from each side, and now its smooth as silk on silk, but zero play. Keep a magnetic tray handy, and don't take them out over a carpet... ask me how I know 😂

Great comparison and fix. Thanks.

I have seen a few of these videos now and a few different ways of fixing them to be better. You have a very good insite to some of the issues thats good to know about. Other ways i have seen with the lose ones some times the balls are slightly out of spec you can order higher precision balls. The extra tight ones i wouldn't discard you could try polishing the contact surfaces as this would remove a very very small amount of material. I would say a tight one i would be more hopeful than a lose one to fix.

I bought a set of rails and while they slide great when I opened them, after replacing the bearings, they no longer slide well at all. When I looked at the retainer clip, I can see that it's bowed in at the center. That's what's preventing the bearings from running smoothly through the track. So if I do your little trick to slightly bend the retainer clip, that should help? Thanks. :)

Thanks ! I will fix mine

I have an idea that could save me about 1000 euros, and they can be as bad as they are. Only thing I need to know, do they work when its a pulling load? Basically rails are bolted down, and load is pulling up and do bearings work then?

What do you think of PTFE spray to lubricate them?

you should've put an affiliant link to some on amazon i wouldve purchased.

Hi. How much play must have linear bearing with rail? Should it have some play, or should it be completely rigid?

Can you mount 2 sections of rail end-to-end to get a longer run or does that result in an bumps/innacuracies as the carriage crosses the joint between two rails?

where exactly are you buying these? great video

Thanks!

I have a few questions, 1) how many of the balls should be in each of these slides? 2 ) will white lithium or PTFE lube work on these for lubing them?

Does anybody know what these blocks are rated at for load (weight)? I'm looking at them on Amazon to use on a flattening router jig that I want to make. Thanks for any help!

I need this

Any links to these linear rails?

Please tell us what is the use of This Things?

chek the bearings. most of the time they are undersized and this is where the slop comes from.

Are those Hiwin ?

Would way oil be ok to use for the grease?

You're not telling the sizes of the Rail

I don't know where you got yours but mine look the same but none of the problems and they say made in Romania. Which is actually good quality. It just happeneds i was born in Romania but moved to the states 32 years ago but a lot of high end companies make their stuff in Romania because the labor is sti dirt cheap but the workmanship is good. From my 2020 mercedes sprinter head light and tail lights say made in Romania to some kenneth kole leather shoes. So u must have gotten the bargain basement that you find on shady sites. I paid 100 bucks for 600 mm and 4 green carriages with a ball screw.

hi i need some advices i planned to make some engraver which is better between linear bearing-stainless steel rod n linear guide?

lmao 1/10th of a mil with a fuckin screwdriver? okay maybe...

we have this product made in Japan quality but price is made in China

I just buy THK or NSK . Problem solved