Can 3D Printed bearing run at 233km/h?
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- Опубликовано: 23 мар 2021
- Testing 3d printed bearing designed in Rhino 7 (grasshopper). Choosing which one is better PLA or TPU for future projects.
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3d printers used :
Artillery Sidewinder X1: amzn.to/318pRvN
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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.
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
You can't really calculate speed like that
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.
Even steel bearings need lubrication. where did this 233km/h come from ?
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.
Should have tested with grease.
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.
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
4:59
I think that the design should address the difference in size. There wasn't a size mass ratio. Regardless very enjoyable video.
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 ;)
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.
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 wouldn't stick my finger so close to something like that, especially if I'm testing it's durability.
So, conclusuion I get from this is 3D printed bearings can work, but it's best kept to low speed
Made a mistake at
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!!
You need to make a jig to sit it all in
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.