Another important reason to convert to ceramic bearings, is that the high frequency harmonics from the ESC induces current in the rotor and axle. This is not only a slight cooling issue, but that current is going through the bearings too, so the race surfaces erode and breakdown of the oil is accelerated. Using ceramic bearings, which are insulators, solves that problem and the higher rpm is not only from the lower drag from ceramic bearings, but also from breaking the path from these spurious eddy currents.

I just set up my fantom 13.5 at 6amp and got 51 50 51 and kv 4086 and rpm 29828 is that a good one

The Ceramic bearings weren't even spinning correctly when you spun them with your hand, this seemed odd... Also, the "Ceramic" bearings you used have metal races... so now you enter the world of the Hybrid... and it isn't unusual to receive junk Hybrid bearings if you buy them on the cheap.

If you put the bearing in a bag and stick them in the freezer for 5 mins they will just full in the case

@nickadams5411

7 жыл бұрын

Hi Paul Yes, you are right, the metal will contract and make it easier to fit in a tight recess.

Interesting, I put ceramic bearing in and had an increase of about 300 RPM and a decrease in noise. I did flush both bearings and use the same oil in both. So, I wonder if the quality of your ceramics were the issue or the lube in them causing your 500 RPM decrease. The motor I tested this in was a 24k certified 21.5

@nickadams5411

8 жыл бұрын

Hi John I agree There was less noise with the ceramic. Quite often motors make a lot of noise when the standard bearings start to wear. I did a follow up test, by flushing out and then thin oil, but there was no improvement. However: These are very tight tolerance bearings. Tighter tolerance bearings are meant for high precision machine operations. So perhaps they give drag if not perfectly aligned. Running the motor should align them, so you could be right.

There new bearings you’ll need to break them in before they move more freely.

@netzero07

Жыл бұрын

That’s what I thought

So was this motor broken in? Love to see a follow up on it.

maybe you damage the bearings during the installation... To insert the bearings you hit its internal part, when you had to press the external one, otherwise the blows and pressure are supported by the ceramic pieces. These bearings are probably not designed to receive lateral forces. Proof of this is the poor turn they have and performance.

I was thinking of putting ceramics into my motors for underwater purposes, but the motors are only £6 so probably will just replace them. Nice way of doing it without the drill press, thanks.

@nickadams5411

6 жыл бұрын

Hi Gary Yes, as they use stainless steel case, they shouldn't rust. But hopefully the ball cage is stanless as well.

hi nick in your opinion what is the best motor for a x ray buggy kit 1/8 ?

@nickadams5411

7 жыл бұрын

Hi Florence I have not tested the larger motors used in 1/8th buggies. But you can't go wrong with Trinity/Revtech motors. Always check the temperature of the motor after a run. If not hot, then it can be timed/geared to go faster. If too hot to touch then slow it down, timing or gearing. Race on nick

@Florencio947

7 жыл бұрын

thank you very much

I bet they will get better over time, just need some break in.

@nickadams5411

8 жыл бұрын

Hi Maybe, I will test again after a race meet. Break in implies that the bearings have too much grease in them or the cages or parts are not aligned. Cheaper bearings have a lot of play and so perhaps have less friction. Tighter tolerance bearings are meant for high precision machine operations. So perhaps they give drag if not perfectly aligned. Running the motor should align them, so you could be right.

@sheniquemedina5685

4 жыл бұрын

@@nickadams5411 any and all motors need to be broken in...period. Anything with new metal ...rotating shafts..pistons or bearings MUST be brokin in...also dont hit bearings..u will damage. Just pop in freezer.

Nick, usualy Steel bearings are good from 0 to 25k rpm at for more rpm at 35k and more ceramic balls are better, ceramic balls are more precise than steel (bearing use less gap), an other idea for you; use new steel an ceramic bearings clean them (remove the orignial oil) then lubricate them with motor oil bearings for RC, then test both configuration bearings @ 30k rpm and 40k rmp and see the difference

@nickadams5411

4 жыл бұрын

Hi, Thanks for the info, very useful. Keep safe. Nick

@hightechdronesreviews9691

4 жыл бұрын

@@nickadams5411 Thank's, you too, continue to make video about motors and electronics i realy like your channel

You forgot one thing ceramic bearings that you installed are new and have the broken in. Eventually you will get more performance once they are worn in.

@nickadams5411

5 жыл бұрын

Hi Michael. Thanks for the information. I should also have mentioned, that ceramic bearings do not expand with heat. And these motors run hot, so there should be less losses at high temperature.

The second bearing you put in, looked too tight a fit.

@nickadams5411

5 жыл бұрын

Hi Remko. You are right that some bearing housings are too tight which gives a lumpy and poor bearing. Unfortunately these mass produced parts are often tight or loose.

Run it in and try again Nick,

It's the rs one

@nickadams5411

7 жыл бұрын

Hi paul Retest and adjust after a race. If you can get 4150 at 6.0 it will be very good.

You don't hammer in bearings bad test

@PremiumMind

4 жыл бұрын

Like a caveman with tools.

That is a awesome debunk RC urban legend. I knew guys spent big bucks for ceramic bearings in the motor. The only one place I do notice is on the kit. When I ran 12th scale the ceramic bearings for sure rolled much longer but I don't think it really made any improvement in performance.

@nickadams5411

4 жыл бұрын

Hi Brian. There is a lot of disagreement about Ceramic bearings. One thing is certain though, and that is they are affected by dirt and water the same as standard bearings. And then any advantage is gone. The tolerances can be tight which can make them even mor susceptible to dirt grinding them down. All bearings require a bit of oil, and ceramic are prone to seze if not oiled. If you replace the wheel bearings etc in your car with ceramic, they will be very smooth, partly due to the closer tolerances, which means less slop. But they suffer from impact damage as well as dirt, and will soon lose any smoothness. In motors the ceramic should have less rotational resistance, but any misalignment will negate that. And I did not find any improvement. Some say you have to run them in. What they allude to is that the bearing is not aligned, and it has to be worn out rather than worn in to get it to spin freely. Thanks for your observations. And keep racing. Nick

@brianj7639

4 жыл бұрын

@@nickadams5411 I totally agree. When I was only running indoor carpet I like using ceramic but now that I am racing more outdoors it is not worth the trouble or price. I do like the video and I always wondered about the ceramic in motors. I personally always thought it was over kill.