Cleaning and re-lubricating MGN carriages (READ DESCRIPTION FIRST!) 

Grease or lubricating Oil is enough rust prevention. But the shipping oil is mostly not that great in terms of lubrication and providing a smooth motion.

Not all oils and grease are the same and may not mix well. If you just grease over the oil you will have pockets where there is no grease and just oil which is not good for lubrication.

10:08 he said 2mm balls

Usually nowadays a quick flush with iso to get thw shipping oil.off and a regrease is all thats needed

I'd really like some info on this too. I just received my rails. They are covered in light oil, not coated in grease. Should I give them a thorough clean with degreaser and IPA? What's the best procedure for getting fresh grease into them please (ie. without dismantling them)?

I have the same question too, like A G I have just received my rails

Are we still waiting for the "quick flush" explanation? I would be glad, too.

@@martinlacher7932 from the Voron discord I gathered the feedback that this means cleaning with something like naptha or IPA and then flushing the dirt and grease out with either more naptha/IPA or something like WD40, before lubing them. Could be wrong but that's the feedback I received and also how I've done it myself: I cleaned with both naptha and IPA by soaking them, letting them sit and then rubbing the dirt off. Then flushed with IPA. Lubed with lithium grease

@@BinaryBlueBull what kind of lithium grease? Superlube? Can you specify what action you mean by 'flush'? I'm looking at just soaking then scrubbing with a toothbrush.

What I've done that's worked well is soaking in 99% IPA to get rid of any preexisting lube or oil, and then using a grease gun (I use EP2 grease) with a blunted needle tip you can very easily insert into the ports on each side of the carriage. Simply wipe off anything that squirts out and move it back and forth on the rail to work it in, you're done!

Flush - cleanse by causing large quantities of water or liquid (iso in this case) to pass through it.

Simple green

krytox gpl is PTFE-based oil so it is probably okay.

69 meme ters

3/32"

@@keebsnstuff3400 RoboDigg MGN9 guides were 2mm, suggest measuring your balls before ordering anything.

Your rails shouldnt be aluminum. Discolouration of the rail shouldnt affect performance either really.

@@CanuckCreator it's became matte black and no longer smooth. I spent the last 4 hours polishing them with some 5micron diamond paste so they are pretty much back to normal. I just hope the diamond paste (approximately equivalent to about 3,00-5,000 grit sand paper) didn't ruin my tolerances. I also have to wait for new bearings, since these ones are no longer smooth. I do think my red end caps (sweep seal is what I've heard it called) is ruined. Part of the rubber coating has started to come off. But only on the inside so it will probably be fine. To be clear, I don't blame you or your recommendation of simple green. But rather mentioning that for me, and the Reliabot rails on amazon, I would stay away. It's just weird lol. Should be able to have them re assembled Tuesday when the new balls come. Looking for a new solution to clean them in. I have acetone, but am afraid of ruining the plastic or rubber sweep seal thing. I do have some, but not a lot, IPA. Do you have another suggestion you may recommend perhaps? Thanks for replying! :)

Wow im sorry to hear, Ive never encountered or heard of that happening to anyones rails using simple green before, its pretty commonly used amoung others for this as well.

@@CanuckCreator yeah, after some research I didn't see or hear anyone having an issue like mine. Everything was steel too, I tested it all with a magnet, so IDK why it reacted like it was aluminum. :/ Either way. I have most of it done, just ordered new ball bearings, since the original ones are too far gone, and I should be good to go. My concern is with grease. I have 3in1 ptfe lube already, and some krytox grease I could use(silicone grease with ptfe), but wouldn't grease be more likely to trap dust and filament bits and other debris? Or have you not noticed that as an issue?

@@CanuckCreator simple green is not safe to use on stainless steel. You can use the "Simple Green Professional" (the purple stuff) instead.

Decent quality rails have no play whatsoever. No comparison to V-slots, in particular in the long run with wear and tear.

@@christophmuller3511 yes but we use clones don't we? decent rails cost like a hundred dollars

@@ameliabuns4058 Go on eBay or any other auction Side and Look for used industrial rails. Most of the time they are about as expensive as clones but way better (might have to Clean Them though)

@@clypeum5063 I live in Iran so thanks to US Sanctions we can't buy from the Internet. I mean outside our country

Mag dish is bad...you don’t want to magnetize the ball bearings

they have a thick protective grease when you get them. cosmoline. they wont glide easily with it in there

@@AnselGaddy I see. Thanks.

care you elaborate?

@@CanuckCreator Castrol Longtime HS 1.5

@@darkracer1252 White lithium is a good, commonly found grease that you can get anywhere, and it works just fine in this application. Its a 3d printer with practically zero force on the movement system, not a high end CNC machine with cutting forces. Buying specialty greases, while on paper, may be better, are not really going to buy you any significant advantages, if any really.

@@darkracer1252 Hiwin recommends lithium grease for their rails

@@fadsorb11 There's actually multiple recommendations depending on usage.