Maho mill spindle rebuild || RotarySMP

I loved the tour of Luke's shop. ❤❤❤
I wish he would take the time to share some of the amazing projects he does (like the gearbox for your bandsaw)
😉

Hey, great work! That spindle sounds great and you didn't need any loctite or bearing retainer, perfect!

Seasons Greetings to you all!

Fancy mill rides again!

Those bearings are even better than the ones in my Harbor Freight benchtop drill press....(I paid $42. for it new)

It was hilarious to see my comment about ultrasonic cleaning bearings on your comment montage. I think I was extremely diplomatic, and with a complete lack of profanity! ;-)

If the 1 micron don't show a thing then it's time to bring out the CEJ 510-9 mikrokator xD ( I would love to get my hands on a CEJ 510-9 mikrokator btw. Specially cause of how they work.if luke ever find one of those at a auction please make him send me link/let me know. Cause i really want one )

The spindle sounds good now I think it was just needing a good cleaning and lube job

yea the price is outragious!

As an infrequent visitor of your channel: Do you ever do any machining, where thee part is the goal, or are the machines 99% of the hobby?

Great video, execution and information.
Hopefully I will never need it. 😉
The roller dimensions…wow! 😮🥰

Gosh!! Bearings are way more complicated than I ever thought! That is really interesting Mark, thank you. We had a bearing on a swing out wire winch that occasionally burst. It was being used as a wheel so the outside of the bearing was not supported except where it pressed against the mounting pillar. I think it was a sealed bearing but i'm wondering now if it should have been greased or if the odd grain of sand made its way in the cause the burst.

Hope you and yours have a marvellous holiday time Mark and thanks for the videos throughout the year.

Like a buffalo girl!

or .99 but you somehow got the depth right :D

Aww, no chips?

Great video as always Mark! 👍👍
I didn't realize bearings needed such a precise application of grease, looks like I've been doing it wrong for quite a while lol.
I'm looking forward to seeing your new Bore Micrometer from Luke in action in a future video, it looks like a nice piece of equipment.

I've been using the same three Snap-on clicker torque wrenches (1/4", 3/8", 1/2") for 50 years with no failures and no errors. You should expect similar life from your new one. I have three suggestions: 1) unload the setting spindle when finished, 2) keep it out of the dirt, and 3) don't throw them on the floor.

That Luke, what a guy. Nice work on the spindle!

Always enjoy watching your stuff Mark! My dad walked in while you were measuring the integral bearings and I got to explain what you're doing, so thank you for that! Merry Christmas

Nice small torquewrench. Never miss an opportunity for getting new tools.

👍🦘🇦🇺

I think this is the latest I've ever watched one of your videos on a Sunday! Glad to see everything worked out well. Please don't crash the Maho again, I remember that, it hurt! Shudder.

Merry Xmas and a great New Year, Mark.

Cheers.

I wonder why they decided to use dead soft 8.8 socket screws for the bearing retainer? As a fuse?

Well done! That’s truly a labour of love there! Patience and time! Really keep up the great work! Sending regards from South Africa!

Very nice puzzle.
And indeed, Luke is a very generous person.

Nice vid Mark. After reading the comments im now confused about kluber nbu 15. Is it the good stuff or not? I'll keep using using it on my bicycle pedals anyway as ive got a 1 kg tin of the stuff. Merry Christmas

had an idea for the quill, since you don't keep the handle on maybe make a cap with a neodymium magnet in it, that way you can put it on and take it off quickly, without worrying about it falling off. you just have to get the right strength magnet.

I'm sure it's been pointed out elsewhere, but you've lubed 2 things that don't need it; the bearing preload cap (which should only be in contact with the 100% absolutely static outer cages of the bearings), and far more critically, the spindle where you're mounting the 4 ABEC bearings. That fitting should, IMO, 100% absolutely not be lubricated at all. You really, really, really don't want the inner cages of those bearings spinning on the spindle. So unless the Maho docs say otherwise, I'd say thats a pretty big no-no.

For lubing the nose bearings, I'd probably have gone the Schaublin route - dissolve grease in white gas, immerse bearings, pul bearings, allow solvent to flash off. But I don't see any problem with the way you did it.

Very nice result, in any case.

Talk about a cliffhanger… Anyway: nice. I think about re greasing all my angle grinders. All of them have bevel gear drives, all sound broken but they aren´t. You wouldn´t have a recommendation what to put in them? I use Liqui Moly LM47 a lot but I read in other places to use something called "Fließfett".
Another mythical thing seems to be how much of that stuff to put in, some say to just put in enough so that the bevel gear is maybe half covered, it will disperse the grease while operating. But them things do next to 10K rpm´s and the grease will be flung off the big gear, in theory the "Fließfett" should return to the deepest point after use- that would explain why my Dad used to store any angle grinder disc up.
Greasing things is a thrilling theme, isn´t it? I´m not even sarcastic here. Some applications deserve a 2nd thought and/or asking around people who seem to know what they do.
Merry Christmas, fellow speaker!

Great vid, particularly the runtime, but I'm disappointed you've also hopped on the AI bandwagon. It wouldn't have taken long to write that program yourself.

Gut gemacht Mark. I hope the old bearings will do the Job.

I’m blown away by the bearing diameter measurements

As far as I know INA still makes all kinds of rollers and needles for bearings which are available at bearing stores but I am not sure of the tolerances they have. As they aren't that expensive, you could just order like 50 of them and pick the best matched ones. No need in your case I suppose but in case you will need them in the future.

So, did you fix it?

🎉🎉🎉🎉🎉

Amazing video! It's making me crave a maho of my own lol

I was half expecting Mark to edit in a sound like a car engine with a loud bottom end knock for the first start up, then saying "Just kidding" before k1lling the sound effect. 😁

Wow! Thanks for the glimpse into precision bearing, real learning experience for me. Thanks Mark

Can somebody explain (good reasons) why not to use blue Loctite 243 (or low-strength) on 6pcs bolts in this application?

7.85g/ml? You should use 8g/ml, the error compensates itself because pi=3

wooooooooooooooooo yess it's alive 🎉. you dodged a very expensive repair. And finally no more guessing on inner diameters😊 what a nice present or welcome to the rabbit-hole of internal bore gauges. thank you for this spindle rebuilt you did a really nice job.

what a great parcel from Luke. I did not see any setting rings ? unfortunately they are essential.
One of my co-workers told me that he had a conversation with a Mahr-Federal engineer .
They considers bore gages to truely accurate only at the setting ring size .
That is why in a machine shop or production shop, bore gage setting rings are made to the
exact dimension.
Mitutoyo will no doubt tell you what the reliable measuring range is.

The condition of the fastener affects the results much more than the torque after the decimal point. Dry vs. A really good lubricant there's a huge difference and the condition of the thread should be specified in critical applications. I took a gamble with Volvo head bolts that were supposed to be dipped in anti-rust agent and let to dry and I just oiled them but I got away with it thankfully. I imagine they are now a little bit overtight but they didn't snap so I'm good. I used the old bolts and I ran a tap through the holes and a die through the bolts, I even had to buy new taps&dies because it was an M11 thread, never seen those before.

What a great video. Hole crap, I had no idea of all the intricacies of precision bearing, grease volume bearing alignment. As a quality engineer, I am blown away by the 5.000mm rollers.

Another great video Mark, I wish you a wonderful festive season with your loved ones.
Greetings from Switzerland, Dominic