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2205 Motor Bearing Question
#1
So I had a new set of 2205 2300kV motors that I purchased maybe 2 months ago. I finally got around to installing them. I flew a few packs, not pushing too hard to make sure everything is in order, I also rewired my quad and installed new 30 amp ESCs. After flying the 5 lipos that I had charged, I sat down to watch the footage from the mounted HD cam. While watching the HD flight footage, I heard a strange clicking sound. This clicking was not loud. I could not hear it whatsoever over the noise from the props (Cyclone V2s) but could hear it in the HD video. I figured out that it was motor 4 so I disassembled this brand new motor. Turns out the bearings that are supposed to be pressed in place are not actually pressed. The bearings just slide into place, this is the cause of the clicking noise. I have other bearings so I know the bearings are not at fault, the lower portion of the motor is the cause. This is a brand new motor but since it has been sitting in the box on my shelf for a couple months I cannot return it. The quad seems to fly just fine even with this issue. The bearing does not wiggle or move side to side whatsoever but can move vertically. How can I make the bearing fit just a tiny bit tighter so it won't just fall out if the bell is removed? I thought about possibly using dental floss but I think this would be too thick to fit between the bearing and the sidewall. Could I take some silicone, put it on a piece of cardboard or something and use a toothpick to apply a very small amount of silicone to the crease where the bearing meets the motor? I have regular silicone as well as high temp, 750 degree Fahrenheit silicone. This is the best fix I could come up with.

Anyone know how to solve this issue? Anyone have any clever ideas as to how to go about fixing this?

Thanks in advance.
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#2
Maybe putting a VERY small coating of Blue Locktite around the outside of the bearing, slide it into place and let dry? Think this will work or is there a better option?
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#3
If there is no sideways play, I would guess that you are missing a shim or washer between the c clip/screw and the bearing
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#4
No the shims were present. Like I said, I noticed a clicking sound when reviewing the HD footage after installing new motors and what not. So I spun each motor by hand, listening very carefully, which narrowed it down to the motor that was the cause. I took the motor off the arm, then I removed the c-clip, then the shim, flipped the motor over to remove the bell but as soon as I flipped the motor over the bottom bearing just fell out. So next I removed the bell, the top bearing came out when I pulled the bell off and was around the motor shaft. The bearings are supposed to be pressed into the motor base and should not fall out freely when the C-Clip is removed. With the motor bell removed, when I would insert the bearings back into their positions. The bearings did not move radially, in other words the bearings could not be moved side to side and if they could the motor would be junk as the motor base bearing journals are too big. At this point I know the motor is not garbage, it shouldn't be anyway as its never been used.I then slid both bearings back into the motor base and reassembled the motor except I did not put the c-clip or shim back on. Using a super bright LED flashlight and some patience, I then moved the bell/shaft vertically just to the point where the motor shaft would sit flush with the bottom bearing. By doing this I was trying to see if the top bearing would lift up slightly as the shaft/bell was lifted, the bottom bearing would normally not be able to move as it would be sandwiched between the c-clip/shim and the spacer between the top and bottom bearings. The top bearing was moving vertically ever so slightly when I did this. So I came to the conclusion that the clicking noise coming from the motor was caused by the top bearing being able to move vertically just a tiny tiny bit during flight. I ended up fixing this problem first try thanks to a fix I learned with Tiny Whoop propellers.

When a Tiny Whoop propeller does not stay on the motor shaft because the mounting hole has worn, making it a tiny bit bigger than it initially was when it was new. In other words, if you have props on your whoop that always come off the motors during flight, here is how to fix it so you don't have to throw away those f**king $8 Rakonheli tri-blade tiny whoop props. For real though, haha. An easy fix for this issue is to take a strand of dental floss and thread it through the hole for the motor shaft. I use a needle to push the floss up and out the motor shaft hole on the top of the prop. Once the floss is through the motor shaft hole on the prop, put the prop back on the tiny whoop noting how it now fits just a tad tighter than it did before. Now use an exacto knife to cut the floss flush with the bottom and the top of the prop while leaving the prop on. If done correctly, you can't see the floss at all. Now your tiny whoop prop is fixed and will not continuously fly off during flight. In this scenario, if you remove the prop you will have to replace the floss. Basically I used the same idea to fix my motor.

I took a piece of the un-flavored Satin Dental Floss that I have and put one strand through the hole in the motor base where the bearings go. Once the floss was threaded all the way through the motor base, I pushed the bottom bearing in. When putting the bottom bearing in I noticed it did not fall into place like it previously did. I had to actually press the bearing into place using a little force. Like I said, these motor bearings are lightly pressed into place from the factory. The amount of force felt the same, I took a second motor off to compare it too. Once the bottom bearing is back in place, I cut any excess floss from the bottom of the motor with an exacto knife. Then I flipped the motor over so I could access the top of the bottom bearing through where the top bearing should be. I then used the exacto knife to VERY VERY CAREFULLY cut the floss flush with the top of the bottom bearing. Once this was done, I cut another piece of floss, inserted it into the motor base so it stopped at the top of the spacer between the top and bottom bearings. Then I pressed the top bearing back into place, making sure the floss was secure so the bearing wouldn't push the floss further down onto the bearing spacer. Once the top bearing was pressed back into place I reassembled the motor and reinstalled it on my quad.

I just finished reviewing the HD video from the 5 4S packs that I just finished ripping. I made sure to fly extra hard to test the fix. I did end up hitting a ghost branch after power looping a big ass branch and smashed into the sidewalk. I broke 3 props and chopped one of the receiver antennas but.....Same shit different day, the motor works as it should though! haha. This fix should last as the bearing cannot move whatsoever without disassembling the motor and pressing the bearings out, as it should. I suppose only time will tell, either way this didn't cost me a dime. Once I realized this fix actually worked, I wanted to be sure to update this post to possibly help anybody else that may have the same problem as well as provide the fix for others to read as a preventative measure. That way if one doesn't have this issue but reads this then encounters this issue in the future....problem solved.

They were Racerstar BR2205 2300kV motors btw. I searched online for a good 45 minutes trying to find a fix but all I found was a couple other people that did have this same problem with these same motors. I also checked my 3 other motors and this was the only motor with any problem of any sort out of the box.
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