Bearings

[neagron]

I hope this is in the right section and im not doing anything wrong,there is a company in west london  www.rcbearings.co.uk,they do a very big range of bearings at competitve prices,ive used them on heli's with no problems,have a look at there site,hope this is of some help,Marty.

[teslahed]

Well it's in the right section now and the link looks useful, so thanks!

I can see it taking me a while to work out exactly which ones i need for any given motor though.

[neagron]

They do ceramic ones as well,dont no if they would be any better for our motor,s,Marty.

[Gaza07]

Nice link Marty thanks, I have moved it to the brushless motor section although it was ok where it was 

[teslahed]

Are there standard sizes for these kinds of things?

I have some Keda 20-26Ms with nackered bearings that i would quite like to repair;

http://www.hobbyking.com/hobbyking/store/__3732__hacker_Style_Brushless_Outrunner_20_26M.html

but no idea what size bearings they would take or which kind would be best. Any advice would be appreciated, thanks

[Gaza07]

Knock em out and get a digital vernier and measure them 

[neagron]

One other thing they the p+p is only £1 on any size order,may be an idea for a stick a list of motors and bearing sizes,just a thought.Marty.

[teslahed]

I need replacement bearings for these motors;

http://www.hobbyking.com/hobbyking/store/__18152__Turnigy_Aerodrive_SK3_2826_1130kv_Brushless_Outrunner_Motor.html

The official replacement bearings are these ones;

http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=27199

Can i take it that these sizes;

Spec.
1x 10mm x 3mm x 4mm
1x 8mm x 3mm x 4mm

Will allow me to order bearings from elsewhere to fit? Or do i need to get some digital verniers on them?

I';ve had a quick look at the www.rcbearings.co.uk website - can anyone tell me which type of bearings are the best for brushless motors?

[teslahed]

I emailed the guy to double check - he was very helpful.

For my motors ( Turnigy Aerodrive SK3 );

http://www.hobbyking.com/hobbyking/store/__18115__Turnigy_Aerodrive_SK3_2826_1240kv_Brushless_Outrunner_Motor.html

I needed these two sizes of bearings;

http://www.rcbearings.co.uk/index.php?route=product/product&filter_name=3x10x4&product_id=343

http://www.rcbearings.co.uk/index.php?route=product/product&filter_name=3x8x4&product_id=311

Possibly in the future i might get better results with more expensive ceramic bearings, i will have to look into that, but at the moment i can only afford the standard bearings so hopefully they';ll do the job.

[Gaza07]

Look forward to seeing how you get on with this 

[neagron]

Hi Chris,the guy at rc bearings name is colin long and he';s really helpfull,he contacted my mobile phone one saturday night about 8pm to answer a question I had,also small or big order £1 p&p,Marty.

[teslahed]

Well i';ve got the old bearings out of some of the noisier motors;





Although looking at the one on the right i doubt the mud was helping it run smoothly either!

[Dans]

Well it';s in the right section now and the link looks useful, so thanks!

I can see it taking me a while to work out exactly which ones i need for any given motor though.

It would seem that DJi have sent out their Phantoms with sub standard bearings in the motors. A lot of people are having problems after less than 30 flights, me included.
I have spoken to Colin from RC Bearings. He seems genuine and stresses that if there are any problems with the bearings he supplies he will refund 100%.
Here';s the link to the Phantom bearings page
http://www.rcbearings.co.uk/index.php?route=product/category&path=69_125

Hope this helps

Dan

[shaktar]

Nice find,

Nice to know i can get some nice ceramic bearings when they start to fail.

[rickp]

How easy/hard was it to push the bearings off the shaft?

[Iberian]

Not hard neither easy just need to do it carefully. I use this tool http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=20146 and a small vice and hammer.

[rsmith21]

Just ordered 8 Ceramics for the IFLY 2212 Motors 3*8*4 they don';t seem to last too long and I';m not doing that much flying so it has to be done.

Anyone know of a supplier of the Circlips or E clips 2.85 ID for holding the assy on a 3mm shaft.

[ChrisH]

Sorry no. Found 2.5mm but not 2.85mm.

Do you know that 2.85 is the exact size? My motors have 4mm shaft and 3.2mm circlips fit!

[rsmith21]

Sorry no. Found 2.5mm but not 2.85mm.

Do you know that 2.85 is the exact size? My motors have 4mm shaft and 3.2mm circlips fit!

When I couldn';t find them I suspected something wrong with my measuring. The problem is the little groove is so thin, the callipers don';t get all the way to the bottom. I super glued two old scalpel  blades at a slight angel to make a shallow V pushed them into the groove and marked the place in line with the centre of the shaft, then measured that ........ its about 2.4 so have ordered them. Thanks for taking the trouble to look 

[SimonS]

When you order circlips you order for the shaft diameter not the groove so you want 3mm.  See here:-http://www.modelfixings.co.uk/circlips.htm

[ChrisH]

There seem to be a number of different ways of specifying c clips. This one uses the groove diameter and the shaft diameter!
http://www.ebay.co.uk/itm/2-5MM-EXTERNAL-E-CLIPS-CLIP-CIRCLIP-DIN6799-pack-of-20-/270661240441?pt=UK_ToysGames_RadioControlled_JN&hash=item3f04aac679

Think its a case of reading the suppliers spec with care!!

[ChrisH]

Simon, that';s an interesting site you tagged. I';ll keep that for future reference. 

[rsmith21]

When you order circlips you order for the shaft diameter not the groove so you want 3mm.  See here:-http://www.modelfixings.co.uk/circlips.htm

Now I';m worried, that site states "E Rings allow a much wider range of shaft size and are sized according to the groove diameter into which they are fitted."

Groove diameter is what I went by.

[ChrisH]

Now I';m worried, that site states "E Rings allow a much wider range of shaft size and are sized according to the groove diameter into which they are fitted."

Groove diameter is what I went by.

If the spec says for 3mm shaft you shoud be OK, otherwise personally I';d order some of the other size as they are only around £1 a pack (on ebay anyway). See the link I posted earlier!!

A minefield. Good luck! 

[rsmith21]

If the spec says for 3mm shaft you shoud be OK, otherwise personally I';d order some of the other size as they are only around £1 a pack (on ebay anyway). See the link I posted earlier!!

A minefield. Good luck! 

Well the bearing arrived today, great service. I put two in my spare motor expecting a silky smooth no play fit !! Wrong.

So the question is how much play is acceptable. I bought the expensive Ceramic type and they are a great fit into the bearing recesses, I have a screwdriver that has a 3mm shaft so its a snug fit in the inner race, I gave them a spin and sure they sound smooth but I can wiggle the inner race a little, you can see it move. I know they will expand when they heat up so some is to be expected.

What are your experiences with replacement bearings.