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Old Feb 18, 2005, 12:07 PM
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button's Avatar
Nashville
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Axi 2212 bearing replacement?

Hello everyone,

Has anyone replaced the bearings in their axi 2212? I have a 2212/34 whose shaft does not turn smoothly, and I hate to spend even 1/2 price to get a whole new motor. Thanks in advance!

John
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Old Feb 18, 2005, 01:17 PM
Boss248
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Funny you should post this..I am replacing mine as we speak. Problem #1 the rear bearing is 1/8" (.125") x 3/8" (.375") and no one in town has that size. The front is .125" x .312" (5/16") which is a common size ( at least around here it is.. ) and yes I called all 5 bearing stores. What I found was the back bearing was actually usable still but needed cleaning and re-greased but the front is very noisey and needs replacement. If the back bearing IS bad a 3/16" x 3/8" will work but the shaft will need to be sleeved out to .187". The bearing were pretty easy to get out with a punch rod and a tap with a small hammer device. Let me know how yours comes out and where you find the back bearing if you find 1..ok

Boss
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Old Feb 18, 2005, 04:55 PM
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Hey Boss,

Are you sure those bearings aren't metric? I'm gonna go out to some bike shops tomorrow and see if they have a match, since I mucked the back one up trying to get it out with a screwdriver (woops!). I'll let ya know.

John
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Old Feb 18, 2005, 05:23 PM
Marion
USA, NC, Hillsborough
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Check Tower Hobbies.com for both SAE and metric bearings. I thnk they are used in R/C cars
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Old Feb 18, 2005, 08:25 PM
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Check out: http://www.vxb.com/

A.
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Old Feb 18, 2005, 08:26 PM
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M Ashmore's Avatar
Bakersfield, California
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Bearing Supplier

Try Boca Bearings
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Old Feb 18, 2005, 08:54 PM
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United States, MA, Walpole
Joined Dec 2003
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Quote:
Originally Posted by button
Hello everyone,

Has anyone replaced the bearings in their axi 2212? I have a 2212/34 whose shaft does not turn smoothly, and I hate to spend even 1/2 price to get a whole new motor. Thanks in advance!

John
I've already done this, with bearings used in RC cars. Look here:
http://www.rcgroups.com/forums/showt...37#post2977637
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Old Feb 18, 2005, 10:16 PM
Boss248
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The bearings are NOT metric...I was able to buy the small front bearing which is a 5/16" x 1/8" ( .312" x .125")...the rear bearing is not bad at all and can stay in until I get the 3/8" x 1/8" ( .375" x .125")...this is not a mistake. It should be a lot smoother and quiter now too... I loves that 2212/26...been a trouble free work horse for 2 yrs. now.

Boss
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Old Feb 18, 2005, 10:17 PM
Boss248
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Quote:
Originally Posted by Tom Frank
I've already done this, with bearings used in RC cars. Look here:
http://www.rcgroups.com/forums/showt...37#post2977637
Thanks for the link Tom...I did not do a search before posting.. Lazy...

Boss
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Old Feb 19, 2005, 07:56 AM
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Tom, that info is gold- it oughta be a sticky. I'll look for those today.
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Old Feb 19, 2005, 08:07 AM
Boss248
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Quote:
Originally Posted by button
Tom, that info is gold- it oughta be a sticky. I'll look for those today.
Ya but I told you about it first... ..just kidding of course..Toms thread proved invaluable...thanks Tom.

On the rear bearing the .312 x .125 bearing will indeed work on thr rear if you use a sleeve. I found a small aluminum sleeve that is used on Tru-Turn spinners that comes in the spinner kits...it's .375"OD x .312" ID and fits perfect on the 5/16" bearing and fits perfect in the rear bearing seat. It's not as good as the 3/8" x 1/8" bearing that comes on the motor but it will work.

Boss
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Old Feb 19, 2005, 09:53 AM
PGR
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United States, CA, Costa Mesa
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Quote:
Originally Posted by Boss248
The bearings are NOT metric...
I find this almost impossible to believe. Not impossible, mind you, but almost. The AXI motors are made in Pardubice, Czech Republic. They are engineered and manufactured by a Czechoslovakian company and the Czech Republic is on the European Continent.

And Europeans tend to think that the American systems of measurement are a joke.

Pete
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Old Feb 19, 2005, 11:54 AM
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Chilliwack, Canada
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How do you know the bearings are bad, when you turn the shaft you can feel like theres sand in them?The reason I'm asking is because I bought a used axi from a ezone member just recently he said the motor was in perfect shape but I think It has a bad bearing. I'm not sure If the axi motors cog at all?when I turn the motor shaft it seems to cog only half a turn then turns smooth the other half turn?My motor Is a 2820/10 I have it in a scratch built 4*40 running on 10 cells.
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Old Feb 19, 2005, 02:21 PM
Boss248
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Quote:
Originally Posted by PGR
I find this almost impossible to believe. Not impossible, mind you, but almost. The AXI motors are made in Pardubice, Czech Republic. They are engineered and manufactured by a Czechoslovakian company and the Czech Republic is on the European Continent.

And Europeans tend to think that the American systems of measurement are a joke.

Pete
The only thing I can figure is that maybe the metric bearings for 3mm I.D. did not come in a large enough O.D. to be as strong as the lager O.D. S.A.E. bearings..I have no idea but I can tell you with a 0 - 1" Starrett Micrometer the O.D. and I.D. mic .375" and .125" and .312 and .125. The front .312 (5/16) bearing fit just perfect in them motor. Maybe they got a righteous deal on some American bearing..who knows..it is odd though..that I agree on for sure but my micrometer does not lie..and I have been a machinist for a long time so I can read a micrometer...

Boss
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Old Feb 19, 2005, 06:43 PM
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USA, IN, Carmel
Joined May 2002
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Quote:
Originally Posted by fourstarforty
How do you know the bearings are bad, when you turn the shaft you can feel like theres sand in them?The reason I'm asking is because I bought a used axi from a ezone member just recently he said the motor was in perfect shape but I think It has a bad bearing. I'm not sure If the axi motors cog at all?when I turn the motor shaft it seems to cog only half a turn then turns smooth the other half turn?My motor Is a 2820/10 I have it in a scratch built 4*40 running on 10 cells.
Axi's definitely cog.
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