3D printing guides: Radial and linear ball bearings!
ฝัง
- เผยแพร่เมื่อ 1 พ.ย. 2014
- Everything you need to know about linear and radial ball bearings!
8mm chromed and hardened shafts, available in different lengths [US/UK/AU/CA] rover.ebay.com/rover/1/711-532...
[DE] rover.ebay.com/rover/1/707-534...
LM8UU bearings [US/UK/AU/CA] rover.ebay.com/rover/1/711-532...
[DE] rover.ebay.com/rover/1/707-534...
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oh fuck, I've seen your recent videos so that's a little bit of a shock. Very glad you stay true and provide top tier content
Really enjoy your channel Tom, as an engineer, definitely appreciate the level of detail and depth you go into these videos. Keep up the great work!
Thumbs up for keeping a straight face whilst talking about shafts haha!!
Especially when you talk about the shaft and it's linear motion
On my kossel mini I have HIWIN MGN-12H linear ball bearings. I'm really pleased with them, they have an extremely tight fit. they're not the cheapest bearings but are in my opinion extremely good for the price
Thomas I envy you your roomy workshop and storage. I wanted to thank you for taking the time to explain a little about the bearing ID, as you can imagine ordering the parts for a 4'x 4' CNC Router is a big deal, and now I have been asked "Do I want the SFU or DFU ballnut with my HGR 25 Hiwin linear rail kit. Well I would sooner have rack and pinion but there are good things about each method of motivating. But in that moment I realized I had better know exactly what all this nomenclature is meaning.
Hi,Tom, your video is very helpful. Thank you.
Thank you for your videos. Hope you keep to it.
Thanks for the information, this was really helpful with figuring out a problem I was having with my printer!
I noticed that you briefly touched on measuring threaded rods in this video. Identifying and selecting threaded rods is definitely something I've had trouble with while repairing, upgrading, and troubleshooting my printer. Is there any guide out there that explains the terminology behind threaded rods? Thanks!
I'm toying with a magnetic mounted attachment for liner axises ,the right magnet with a steel greased plate attached to the belt could eliminate belt and stepper chatter completely . Key is the right magnet . the liner bering noes would still be there but V channel and delroin wheels are very smooth .
Great video! I think I'm going to go design my own 3d printer.
real nice introduction!
Hi ,Thomas. How do aluminium extrusions with delrin wheels compare to linear bearings and smooth rods for axis movement?
Just a side note. Try to research where the bearings (name brand ) were made. I spent good money for what I thought were SKF German Bearings but ended up with Vietnamese made SKF Bearings. And yes...Country of manufacture has a great deal to do with the final product you receive. That being said from now on I will email and ask country of manufacture before I click on Purchase.
are you going to post something about liner rails vs other forms of movements?
Linear bearings don't work nearly as well as radial ones :(
Some people are starting to 3D print reusable bushings that are lined with PTFE piece inserts, like cutoffs off the Bowden tube or PTFE wire, so the printed enclosure doesn't touch the rod, only a few patches of PTFE do. When it grows loose, you can just replace the PTFE pieces and you're all set again. Maybe something to try.
Thank you for the video
Liked this video......... how about Teflon tube rings on polished stainless shafts? I love stainless and Teflon the Teflon on stainless paring in rotational friction science.sounds good to me.
Very helpful
Use precision shafts and keep lubricated.
- Thomas Sanladerer
Will it make a difference if you used a steel pipe instead of a hardened shaft?Will you face the same issues as with aluminum shafts?
My experience with the Chinese linear bearings is that it pays to wash out the factory 'lubricant' with a light machine oil or something like WD40 (which is NOT a lubricant, it's mostly solvents) and then re-lubricate.
What lubricant do you recommend?
***** Something like 3in1 does the job.
I agree with using a 3:1 oil and not grease in a non sealed bearing. The grease will collect and hold dirt while an oil will slowly flush itself and help to keep the bearing clean. Provided you take the time to lubricate it occasionally.
@@anderslarsson7123 SKF recommends grease for linear ball bearings. Ex. SKF Linear ball bearings catalogue 2003-08 (p. 16) -> "....linear ball bearings are, in general,
designed for grease lubrication....". I believe they do this, as linear ball bearings generally mostly do low speed operation, where oil has a hard time to form a film, and thus grease is better at protecting the bearing. I think in general for high speed applications (ex. sewing machines, engines) oil is used. Even the orientation of the bearing matters, as to how oil might pool in places where it cannot recirculate or even drip out.
As for the specific type of grease, it seems to be highly dependent on the application. Probably a lithium grease of viscosity class 00 to 3 is fine. Some sources (ex. linearmotiontips) do mention you should not use PTFE or graphite type grease.
5:48 i have same setup but not connected a flat surface yet i am doing this for my own homemade xy drawing machine. Is there any other way of connecting flat surface to 8mm bearings any recomendation?
1:45 "zz is where it has a dust cap protecting its balls from dust and bigger objects " XD
Curious what you think about just plain bronze bushings on shafts? I use a Da Vinci printer that I am modding heavily including replacing the electronics and wondering if I should go through the hassle of replacing their linear motion setup which contains only bushings.
***** Could you please talk about ball bearings vs. plastic and bronze bushings in a future video?
I got an Prusa Mendel i3 printer and are going to upgrade the X-axis, going from vertical to horizontal.
My current linear bearings is ok, but a little loose(vertical X-axis).
I was wondering if switching to radial bearing may be a solution to try out , have you tried this?
+Thomas Sanladerer "Which was everything but an elegant solution."
Do you mean that while it was a good solution, it failed in all respects of elegance? Or was it that it was just a poor solution?
I am asking as I can either go with high quality radial bearings, or low quality linear bearings.
Pls try some PLA printed bushings
My belt rubing some bearing part, which grease to use for belt, so this squeeking will stop?
excellent
hi i have a question :)
wondering if you know how to hook up a lcd and sd card controller to a sanguinololu board. there isn't verry much about it out there.
Are you listening to the old Tonight Show Band featuring my hero Doc Severinsen in the background?
***** 2nd song sounds like Stardust
Wondering, how would you support a shaft with both linear and rotary motion?
شكرا لك مجهود رائع
Is there an easy way to drill the ends of the hardened linear shafts for tapping threads?
White kind of grease do you recommend for lubing linear rods? Do you think lead screws should be lubed?
Scott Dickey imo motorcycle or bicycle chain lube works well on both the linear rods and screws , it's slightly waxy so it doesn't pick up dust and grit as easily, provided you use it sparingly
I ordered saft for 8mm I'd before ordering 8mm lm bearing I also measured the saft which was 7.6 to 7.8 mm reading I thought may be it will not matter much with lm8uu linear bearing , But later when it arrived i noticed lots of loose play because of 7.8 mm saft , so I am not Sure what are the tolerance with proper saft of this Size ??
thanks. Godbless
Why there is play in lm8uu based linear rail , I measure the diameter of different roads all diameter is less than 8mm it's around 7.6 to 7.8 mm is it common tolorance or perfect 8mm rods are also available??
Every time I try to use radial ball bearings in a project, I can't get a shaft that will have the proper interference fit. Linear bearings usually come matched with the proper shaft. Can you point me to a source for stainless steel shafts meant for radial bearing in various lengths? I'm not a professional and have only Amazon as my source for steel shafts and those sources won't give me the tolerance on their shafts. Help!
Good info, but you need to look up 'backlash' in an engineering text. To quote Princess Bride, “You keep using that word. I do not think it means what you think it means.” Backlash is, strictly speaking, movement induced by a change in speed due to flexing, stretching, or torsional stress. e.g - Motor stops, print head stops, the frame/belt/linear rail 'un-flexes' and something moves (and usually oscillates) when it shouldn't - that's backlash. In your car, when you brake hard, stop, and the car shifts back on its suspension - that's another example. Something that moves unpredictably because it's loose can make backlash worse, but it's not backlash in itself.
“Heavy grease?” Any special type? NLGI #2? Mobil-28 (aircraft wheel bearing grease)?
Thomas, what are the part nos for the linear guides in an Anet A8 and how many? thanks Fred
i has change my Anet A8 MGN bearig linear rails and have lot lot better and accurate now. all better priter NOT use LM8UU bearig all have MGN bearings.
Three more hints. I've designed and then built a number of robots and when using linear bearings, always get the 'split' type, which allows you to adjust the radial pre-loading inside the block assembly. Next, opt for bellows covers that run the full lengths of travel. In 3D printers the vapor from the melting plastic, as well as dust in the average work area, puts layers on the surfaces that gets worked in as the bearings roll over the tiny particles, bellows covers keeps things clean. My last hint here is… forget drive belts, instead use stainless steel bands, they're far more precise, far cleaner, thermally far more stable, and ultra durable.
when you say steel drive bands, what exactly do you mean?
where do u get ss bands?
I just saw these bellows for ball screws today and for the first time I have considered this as a solution to a CNC Router DIY 4x4
Way oil is great for lubricating and protecting shafts. That's what it's been made for for centuries...no need to get too complicated, although I like your suggestions. I've never heard of a SS band...what the heck is that?
Google for stainless steel timing belt. I'm sure that's what he meant
your videos are so damn good brother. I am from India. I am building prusa I3 now the y carriage is very hard to move. please help me out sir . I got rods for a very cheap price and drilled holes for bearings manually. so definitely possiblity for miss allignment. I have three zip ties for each bearings. what should i do should I use lubricant or replace y carriage with precut slots for bearings or replace the rods. help me out brother
I always kinda feel bad for people who ask for help in a comment section and noone ever replies. I imagine you already have figured out your problem by now, but in the future the comment section of anything is not a good place to ask for help. An internet forum is a lot better.
recommendations to keep the linear shafts free of dust? something similar to the filament lubricant?
***** Why shouldn't you use dry lubricants? I thought that wet lubricants attract dust.
+Cleaver Games to me, it seems like the defacto lube is sewing machine oil, cheap, and can be raided from your (grand)mother's sewing kit
Until she asks you what you're doing with it. "I'M LUBRICATING MY LINEAR SHAFT, DON'T COME IN HERE"
I would assume dry lubricants can act as an abrasive?
unknown303 why do you think i brought up it being cheap
Good
BABY TOM!
What exactly should I use to lubricate the shafts?
bearing seal bush all shaft lubricate out of and no go in bearing ball, no help and no grease/lubricate balls anythink only waste lot grease. need grease IN bearing block, many good bearing block have grease hole.grease go in block and cover balls.
One of my Printrbot Simple Metal's linear bearing on the Y-arm seems to be cracking some times. Its really annoinyg after a time.
Does anyone know how to replace this bearing, since its hammered into an aluminium block?
Email customer support, or find a mechanic, garage, or machine shop that can press in some new LM8UU bearings.
👍
1:46 Guarding it's balls
3:12 - Hardened shaft
Nylon based linear bearings (or not nylon?) - is it usual today?
NOT newer good if use plastic bearing, need ball bearing, not lonlive all plastic system worst idea.
If i have a 10mm shaft, should i use 10mm or 12mm linear bearing with it?
Lm10uu
10mm bearing
10mm shaft need ofcourse 10mm bearing, etc, LM10UU only idiot try use 10mm rod whit 12mm bearings hahaha. and 12mm rod not go in 10mm bearings, need be together same size.
Someone should have told creality that radial bearings are bad for axial load. Every creality bed comes with bearing installed the wrong way and with lose fit. I had to print pla shims to get rid of bed wobble.
for high precision linear bearings & shaft holders,just feel free to get contact with me.
Valeu!
Thank you! I'm glad this old video was helpful.
@@MadeWithLayers very helpful indeed... Became a patreon by the way...
I very much appreciate that, thank you!
Did anyone try 8 mm rod in 10 mm bearing for linear slides?
What about 3d printed PLA linear bearing? I am working on a rostock printer and want use hollow aluminum tube with PLA linear bearing?
3:57 do you mean g6?
0:58
Good，your voice charming!handsome man ~
How bad is a drawer slide..
cant you just use some drawer slides
It's so late,,, I just watched a ball bearing video. : (
Put one on my fidget spinner
ممتاذ
4:54 Don't grease your linear ball bearings like that! Gosh! LoL!
No audio?
G
Sealed RS Skaper Bearings in Africa could have eaten that metal dust cap.
Good，your voice charming!handsome man ~