Km/h are used to define the speed of a point but with a bearing you want to mesure the rotation speed. For that, pls use RPM or rad/s, that's more apropriate.

@foosonnenkern1885

2 жыл бұрын

Not only that, but the calculation of the circumference given in the video is also wrong. Instead of π 3.41 was used. This would result in a circumference speed of 216.4km/h Edit: also the same speed is assumed for every bearing independent of it's radius.

@xl0xl0xl0

2 жыл бұрын

Yep, the km/h made zero sense

@alberto1512

2 жыл бұрын

1500RPM and 2800RPM

@odeontlt

2 жыл бұрын

and pls use motor oil.

@whatevernamegoeshere3644

2 жыл бұрын

@@odeontlt Motor oil is not designed for plastics. It has chemicals that make it bind to the surface of the metal chemically and it's made as thin as it can be. Bearings like this need to be either submerged in oil or need greasing. Graphite filled grease would be a game changer here

You can't really calculate speed like that

@wiky1492

2 жыл бұрын

not to mention, the drill has to be fixed at one position, not hand held

@MeariBamu

2 жыл бұрын

He should make video with same bearing size and materials by different industrial Lubricant including Food grade oil and TENGA Lubricant.

Usless test. Every bearing needs lubrication. Alsow you can't use km/h as a measure of speed because every bearing ball have different speed inside of bearing body. You should use rpm as a measure unit.

@AntonySimkin

2 жыл бұрын

And the unbalanced load on those bearings makes it even worse...

@Jsbdhjsvsjsnsbxhxn

2 жыл бұрын

And the smallest one is the best one sense ish ball covers a lager space % wise and gets more cooling. Smal balls in smal ring is better the many small bald in a big ring do to heat. You have to scal all in proposition to it self.

@Jsbdhjsvsjsnsbxhxn

2 жыл бұрын

Ps. Sorry my bad English.

@MaxMut.

5 ай бұрын

Hey! Was fun to watch at least :)

thanks for the test, but I believe that to be reliable this test should be done on a lathe or column drill, with a free hand just tilt the spindle a few millimeters to make it work off axis, exerting more friction in the bearing and consequently a different wear at each test

@AntonySimkin

2 жыл бұрын

Came down to comments section to say this...

@cptairwolf

2 жыл бұрын

I was thinking this exact same thing as I watched him. I bet they all failed because of this off axis pressure.

@gabrielenitti3243

2 жыл бұрын

@@cptairwolf well, i think ball bearings are used for this purpose, they are supposed to have off axis pressure otherwise we wouldn't need them

@10010Linus

2 жыл бұрын

@@gabrielenitti3243 the reason most bearings fail is caused by incorrect usage by inexperienced users (in this case it was caused by off axis loads on a radial bearing by unintentionally tilting of the drill) There's a darn good reason as to why they are designed the way they are Heres 2 good videos explaining the different kinds of bearings: kzread.info/dash/bejne/onh3m5uhltbel7g.html kzread.info/dash/bejne/ipZpm9qtj8XRn84.html

Even steel bearings need lubrication. where did this 233km/h come from ?

@MrFEARFLASH

2 жыл бұрын

I also think that steel bearings would not withstand such speeds and times either. Lubrication required

@Acissye

2 жыл бұрын

Calculations with the wrong units mm vs cm so the speeds are 10 times too big (also see top comment - the og captain)

@biomushroom7227

2 жыл бұрын

Worst than that... Rotational speeds needs to be expressed in RPM. Even tho, the peripheral speed increase a lot with small radius increase due to 2piR expression. Smaller one withstand the rotational speed because its peripheral speed is way lower than her sisters with a bigger radius, si it even heats up a lot less due to less "motion" that causes friction and subsequent failure of the "beans". If u calculate the distance the biggest bearing runned in 15 secs and compare it with the distance the smaller one did, I'm quite confident that the biggest one had won even standing the mere 15 seconds...

@miked7923

2 жыл бұрын

Some plastics are self lubing i don't think that's the case here but just a heads up

@holycow4691

2 жыл бұрын

I think, he wants the bearing to be used in a ferris wheel... also people using rhino for industrial designs... 😁

There's been enough comments about how it should've been done, and that it needs lubrication, etc. But you actually inspired me that I could design a 3D printer large-format bearing for a machine that I'm designing that has a moving part that's very lightweight. I think the biggest bearing in your design could totally help me make that part without having to buy a super expensive big bearing.

@zombieno1

2 жыл бұрын

I also think that TPU is a good choice for noise reduction.

@BloodyMobile

8 ай бұрын

I really love the idea of the C-clips on the inside, that's really clever. It allows disassembly while securing them well together once they're put onto something.

@BrianMeeks

6 ай бұрын

I'm trying to figure out what TPU means@@zombieno1 I saw the tiny white bits he was using and didn't know what they were. Could you enlighten me?

@BrianMeeks

6 ай бұрын

I think I figured it out. TPU must be a type of filament. I just got my first 3D printer. I've not even set it up yet, as I'm watching LOTS of videos to learn before I get started.

@zombieno1

6 ай бұрын

@@BrianMeeks I did years of watching technical videos before buying my printer. Make tiny adjustments and small test prints before going big. Good luck and enjoy

Should have tested with grease.

@rkseifert

3 жыл бұрын

Somebody else did a test similar to this and grease made a huge difference.

@BOTmaster15

2 жыл бұрын

Pack as much as possible lithium grease in them and then close bearing shut. Then it wil be different story (I have never found/bought bearing that wasnt pre-greased or manual told you to do so)

@Mr_Yod

2 жыл бұрын

@@rkseifert Yes: it was for 3D printed worm gears. =)

@BTGDelta

2 жыл бұрын

Also, testing bearings without any load is pretty meaningless too. I mean, even if the 3d printed parts withstand pure RPMs, they might fail if you put them under even slight load.

@alberto1512

2 жыл бұрын

@@BOTmaster15 as much as posible and close it is going to get heat to, just a little is enough

I am going to say the same thing many others have, use grease next time. Never run any bearings, steel, PLA or otherwise. and yeah, speed in RPM is far more appropriate for this type of experiment, I believe the drill should at least give you a ballpark if you don't have a tool to measure its actual speed

@alberto1512

2 жыл бұрын

1500 and 2800

4:59 - I feel this 50mm one failed prematurely and it wasn't the bearings that failed, it was your design flaw of having the hex diver opposite to the locking tabs which locked the center hub in place. As you applied pressure with the drill you pushed the locking ring out. If the tabs were on the same side as the hex driver, it would have lasted longer, but I think the bearings would have piled up quickly anyway. But in a way, the 50mm didn't fail the test, (even though it likely would have), you failed it. Another of the rings came apart this way as well.

I think that the design should address the difference in size. There wasn't a size mass ratio. Regardless very enjoyable video.

The method used to clamp the bearings by the outer race is inducting distortion in the bearings which produces heating in the bearings. This will cause further distortion & heat which leads to fatigue and failure.

@tHaH4x0r

2 жыл бұрын

Not just that, any axial misalignment causes non tangential forces which further increase friction at certain points. Ball bearings are already notoriously bad for axial loads, and I would expect a 3D printed bearing to deal with them even worse.

@TheCorrupterX

2 жыл бұрын

Also not being able to keep the drill perfectly coaxial can add friction as well

@KillerXtreme

2 жыл бұрын

Exactly, which is why his way of testing these bearings just made me not bother watching the rest of the video. Doesn't matter how well the bearing is made, they'll fail by holding the drill by hand like that.

@jessebob325

2 жыл бұрын

I concur with the above. A solid testing jig is needed for more accurate results. Annealing could (or could not) improve results as well. But this may be above the scope of this project. I did enjoy it though. 😃🍻

So without lubricant, the basic idea of this test is "does TPU and PLA melt when it gets heated by friction?"...didn't really need a test to answer that.

I think the test is inconclusive because of the variable of the drill angle which was not fixed, the drill was held by hand, the more angle you put in the drill more stress in the part, more heat. Test need to be redone with the drill fixed to remove this variable.

I wouldn't stick my finger so close to something like that, especially if I'm testing it's durability.

@debasishroutray978

2 жыл бұрын

This was the first thing that crossed my mind when the vdo began.

@Joey-Jdi

2 жыл бұрын

He’s just better.

@mred9335

2 жыл бұрын

His hands are 3d printed don't worry

You need to make a jig to sit it all in

Still not understand why you choose TPU for the bearings balls... sound like a bad idea. And rotation speed in rpm next time (the bearings is not going anywhere ;)

@jasonstewart8612

2 жыл бұрын

tpu is pretty abrasion resistant, so maybe thats why. idk tho im no expert

@williamarms2trong857

2 жыл бұрын

@@jasonstewart8612 tpu has a higher coefficient of friction unlike nylon for example.

@jasonstewart8612

2 жыл бұрын

@@williamarms2trong857 yeah but because the bearing balls are rolling and not sliding, the difference of friction is minimal. A more abrasion resistant material such as tpu is going to last a lot longer than most other plastics. But hey, for this application I don't think it matters.

So, conclusuion I get from this is 3D printed bearings can work, but it's best kept to low speed

@BuzzingGoober

2 жыл бұрын

Sure if you run bearings without lubrication. He stupidly ran them dry. The plastic simply overheated and melted. Im sure all of them would have worked.

@alberto1512

2 жыл бұрын

first, lubrication (oil, grease. mineral, synthetic) and compatibility with those materials... second needs to run a load test, he use rollers 90° arranged the load test should be axial and radial

I see lot of people already comment it. But you should make a version 2 of this video, where you lubricate the bearings, and where you don't fix them in with the tension of a vice, but rather in a circular hole. And yes count rpm. Other than that great experiment!!

Great video and ingenious design

A bearing needs to be tested under load, because that's what a bearing is made for. The maximum RPM is irrelevant if it can't even handle 20N of weight.

Your way of making videos is sooooo good!

Feel like some of these would roll smoother if they had a bearing cage to prevent the bbs from hitting each other Can see real potential in making very light disposable drones

This is awesome! any tips on how to dial in multiple parts for printing like that? mine always have layer shifting if i print more than a few

Made a mistake at 3:36 by calculating pi as 3,41 instead of 3,14, sorry for misleading

@Tschosef

2 жыл бұрын

There is also a other mistake in the right calculation. In the last line, you wrote 289200 instead of 389200... but the result is calculatet with 389200 ....

@giacomolambiase3344

2 жыл бұрын

You also used cm instead of mm for your calculation. But your average diameter cannot be 41mm cause it is too low. From the video it may be your average radius. In this case average circumference is (2*41*3,14)mm = 257.4mm Surface speed is 257.4mm*2800rpm = 720720mm/min = 43.2km/h.

Cool cool cool. Guessing the friction heat warps the plastic.👍

Why would you use km/h and not just rpm? The way you do it is just plain confusing, especially with that much of a diameter difference between min and max size. And pi=3,14 not 3,41 Overall a nice video with some unnecessary confusion.

@Eluderatnight

3 жыл бұрын

Surface Feet(meters for you metrisexuals) per second is the number you really want. That(sfpm) and load is how you go apples to apples.

Please redo with grease

i do believe i caught you pushing hard and pressing down on some of them tests. i cant believe your results because of his

Was a very clever idea use Grasshopper to make those parametric bearings

first you need grease, second... you need to hold the drill perpendicular, and without pushing/pulling on the bearing itself as I see clearly that's the point of failure...

besides Pi beeing wrong the "average diameter" for sure isnt 41 cm asuming he's working on a 1cmx1cm grid work mat the max. diameter appears to be approx. 13 cm for the outer edge of the rotating part. based on that its more like: Ø0,13m*Pi*2800(RPM)*60(for rounds per hour)*0,8(assumed efficiency between no load & actual RPM) =54,89 km/h other than that i rly liked the over all quality of this video

Whish software are you using to create the 3d model ?

You should do the same tests with a load on the shaft ! (Also using rpm and grease)

This is great 👍 now I want to print bearings 😁

You're brave for having your fleshy bits near that.

Also wondering if you applying lateral force with drill socket setup.

Having different materials for different dimensions means you can't make a direct comparison between them. You can only do an estimation comparison.

Lubrications such as silicone based lubrication (typically doesn’t swell plastic) would likely help that sticking problem you had

Main problem with this test is that it was run without load. Bearings without load serve no purpose.

really cool experiment, would love to see it again with some light oil or grease and see if they survive, new sub as I hope you try again, cheers!

You should have fixed the drill so u allwas get the right angle.

I use super lube on PLA gears and bearings. Used with low RPM. Thanks for sharing!

You need a test jig so you can test reliably and not have so many variables coming from the way you hold the drill.

@user-hx7dc9uz6s

2 жыл бұрын

also the way they are clamped in

pla got some good ball bearings, could use this for a robot build

Are those bearings lubricated with grease bfore testing???

Занято, а смазку не пробовали добавлять?

there are some fail that because the ball part, and there because the central shaft, maybe you could engineer more thicker and stronger lock mechanism in there, also lubrication help a long way too, I know metal the ideal solution for long-term, but this kinda thing could be use for much easier load too, 3d printer are awesome!

Do you have a grasshopper course? Alternatively, do you have one you recommend?

As already mentioned by many, lubrication would have been nice to see, but more importantly as far as I know it is generally a bad idea for ball bearings to run them without a radial load (in fact that's more or less what they are designed for) and I think this point is even more important as tolerances are pretty high here. I like your effort, btw. :)

Imagine if you had lubed the bearings.

does anyone know how to pull the hex code for those two filament colors?

Ignoring the velocity issue. Was there a reason for testing TPU? Doesn't seem like a logical choice as it deforms easily (kind of the point) absorbing a lot of energy as it spins causing it to heat up and eventually fail.

I think your larger radii would pass your test if you change your design to allow for more ancor points (make it more than two). That way the drill will distribute the force more evenly if you have, say 6 or 8 points of contact to the inner circle (rim/spinning part)

Hello! Why program you used for modeling? I mean block-programming

@ussadesign

2 жыл бұрын

Hello, Its Rhinoceros 3D with Grasshopper plugin. www.rhino3d.com/

no lubrication and calculation are wrong as pointed out by many. Also looks like the black/gold filament has better result than silver/while, the colors added in the filaments can and have impact on the quality of the print. Still an impressive result, good work!

Yes it can. Just make good design, use better suited materials (maybe nylon, or clear pla, i don't know), use higher tolerances, lubricate it, mount it properly - i mean not in 1 point with strange forces applied by hand. But you already know all of this.

@edgarkondrakov9834

2 жыл бұрын

Also if you throw it very fast, it will be moving faster than 300km/h

How do you get linear speed from rotational speed??

Great video, I’d like to see this repeated with lubrication. I can see uses for 3D printed bearings for things like turn tables for a cupboard or table. Any kind of machine that doesn’t rotate too fast. Maybe a rotating display or scanner.

aside from goofy testing parameters.. cool build.. seems a silicone lube might change outcomes.. I expected big bearings to fail (more speed) ahead of the small ones.. nice skills on 3d printer..

I've been looking at this too, and I chose the hybrid route (steel bearing balls and races, with 3d-printed inner and outer cases). While this increases the complexity a bit, it also increases the lifespan by MUCH. You can take a look at the concept for a smaller bearing here kzread.info/dash/bejne/qpZ71tOpl8nKgrA.html and for a large diameter one here kzread.info/dash/bejne/iGF7z7t9aNaqltI.html

Lubricate, use compressed air to rotate, and use laser tachometer to measure the rpm.

@Macabri_2k10

2 жыл бұрын

it's pointless nevertheless, bearings always need to be tested under load, what good is free-wheeling bearing, that is not its job

I think part of the problem is that there doesn’t appear to be lubricant in the bearings. Keep in mind even metal bearings use lubricant and this kind of stress is beyond the scope of “straight from the printer” projects. I would suggest a wax as it’s less likely to react to different types of plastics compared to WD-40.

6:10 well if you dont push your thing out it might work lmao

Pretty nice job on the print quality. You however should've held the drill in the vise and hold the bearings in your hand. The unstable wobbling of your arm made the tests fail earlier than necessary.

I am shocked. Shocked I tells ya. I for cannot believe that a bearing, which is a precision part even on the cheap end, can't be made with a 3D printer at home out of material that can be broken between the thumb and forefinger.

All bearings use some kind of lubrication, in this case a lightweight molybdenum grease would have made all these bearings last significantly longer, also for those that came to say he drilled it on an angle, it doesn't matter because the type of bearing he printed is meant to support some angular loading and ball bearing isn't designed to receive any, also his drive mechanism was poor but it did ensure if drilled too angled or pushed to hard it would just fall out, so it was fair. Do a grease vs no grease comparison plz

Made all rollers same size? May should be sized for bearing needs. And flexible rotor? Try graphite powder as “lube”?

I wounder if sanding the bearing would help reduce friction and or Greasing.

maybe you should print a drill holder because it seems that you putting a side load on the bearings and they die faster

Cool!

the first bearing failure was the vise grip losing a bit and the inner race catching on the vice jaw.

Did you try to oil them?

The bearings are not lubricated at all, and there are so many balls that they interfere with each other, so the balls bounce in the opposite direction. So, TPU bearings with high friction do not work well, and in that state, only one side of the bearing is fixed, and a vertical load is applied to the center shaft compared to the driving direction, which increases the potential for problems. Therefore, it is necessary to add a lubricant such as silicone grease and perform a driving test with a normal load applied to the bearing. And the number of revolutions (rpm) is a simple speed per hour and the calculation should not match. It may be problematic to request a retry for a video that is already 5 months old, but I would recommend that you try the bearing test again as requested by the subscriber.

should try this with Air Soft BBs

Who is going to talk about tolerances with 3d printed balls? Miniscule tolerances will cause friction and easily melt the plastic whichever type you use.. Friction Welding would be the accurate word to describe what is happening here.

Small winner because 233 km/h it's in center, on borer speed more big for biggest bearing

you should make bracket for the drill, so the angle is the same for every test

you should try removing one of the ball bearings from the ones that failed may work better?

Making extra rollers was great idea?

bearings don't appear to have gone through any process to smooth out layer lines, no lubrication, normal people test bearings by rpm not by km/h, and the rotational speeds given are a very rough estimate at best since they were assuming no load.

The petg?

What about load for this bearing?

It's not very accurate when you use your hand to hold down the drill. That has introduced way too many uncertainties. Typically the outer and inner parts of the ball bearings are fixed along the same axis. However, having your hand holding the drill would shift the inner rotation axis away from the outer bearing axis

I think the reason others fail is because there is no ball separator sleeve.

@ussadesign

2 жыл бұрын

true,that was the main reason for most of them

If I could make a suggestion, could you repeat this test with nylon and PETG

Ah a fellow rhinocerous user i see

Just by seeing your design I have seen an error in it. You are not always holding drill in the right position therefore you would need to make a jig, so that your tests are more accurate. Re-design central spindle so that it clicks within bearing from the side of the drill. Also don't forget to put some sort of lubrication, anything helps. Overall great quality prints and critics coming from the comments will be helpful for your future videos!!

It is interesting how long will they last if you use metal balls instead.

PETG: am I a joke to you??!?

i cant believe u clamped them like that.....

not good but not bad, for a more accurate test you need a balanced way to spin the bearing so that it doesn't create friction in one spot or more and also lubrication is needed so it doesn't create over heating and frictionless spin. but it was a goods test to see how a bearing would act if no lubrication and un balanced spin would act noting it is plastic and metal bearings would heat up and shatter but still I see what you were going for gg

There you go, let's put our hands next to the 2000 rpm spinning bearing that your expecting to fail

He also had too many variables going on if you do this again please only change the bearing material and for the size test both PLA and TPU on the same diameter bearing

Es un test muy subjetivo, para que fuera un test realmente objetivo, se debería haber hecho un soporte para los taladros. Tal y como él hace los test´s, la duración de los rodamientos creo que depende más de la inclinación y la presión que ejerce con los taladros que con la velocidad que soportan los rodamientos. Aún así, gran video!

What software is this?

@ussadesign

2 жыл бұрын

Its Rhinoceros 3D with Grasshopper plugin. www.rhino3d.com/

next to pubrication, you are using not a ball bearing where orientation of the ball doesnt mather. You are using another design where orientation of the rollers are important. Then you should use that orientation instead of wacking them in.

mabey u should lube them

I take it there is no lubricant being used on these bearings ?

what about under load ?

I don't see the loads, for what you did this testing of bearing ? To look how they good spinning ? If yes - cool, but if it's will work under loads, so, you must testing it under loads, the bearings create and using to limits relative movement to only the desired movement and reduces friction between moving parts and сarry the loads through themselves. You didn't showed us the loads testing except spinning, it's good test for spinning, but not for working under loads, but bearings will work under loads, sometimes huge loads, so ? Where all this ? I liked you and subscribed ! ) Please, do it right, but not like this time ;)