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Scorpion Power System . Ron's RC Helicopters . Thunder Power RC
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ANYONE SUCCESSFULLY USEING CERAMIC BEARINGS

RACER7696

Senior Heliman

Ma

Guys,With the winter weather coming I have a few engines that need repair. I am wondering if it is worth going to ceramic bearings .Like anything on this forum I have heard positive and neagaitve things . I am wondering how many people are useing ceramics consitently.

10-15-2010 Over year old.
BarracudaHockey

rrMaster

Jacksonville FL

Dont bother. They cost a lot and if the ball comes apart and goes through your engine your motor is done.

Andy
AMA 77227
http://www.jaxrc.com

10-15-2010 Over year old.
DS 8717

rrProfessor

Here wishing i was somewhere else

Not if the ball comes apart,when it comes apart.......

YOU ONLY LIVE ONCE..IF YOU LIVE IT RIGHT THATS ALL YOU NEED

10-15-2010 Over year old.
Gernejr

Key Veteran

Miami, Fl

Just use good quaitily stainless steel bearings in nirto engines. I thinking about changing clutch assembly bearings to S.S. and tail set . looking to get as smooth as possible on vibes ,helps with rasie gain on 720\FBL.

Sponsored by Visa

10-15-2010 Over year old.
PaulBowen

Senior Heliman

Australia.

I have used them in an OS50SX-H Hyper with no problems.

I think a ceramic bearing coming apart is fairly low on your list of worries.

10-16-2010 Over year old.
dkshema

rrMaster

Cedar Rapids, IA

Not worth the cost. Not even stainless steel is a good choice. Plain old steel bearings, lube the motor with some after run oil if you're going to store it, keep it in a cool, dry, place.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

10-16-2010 Over year old.
HotsHabit

Veteran

Idaho

Both sets of ceramic bearings that I used didnt last a gallon of fuel each.

10-23-2010 Over year old.
RACER7696

Senior Heliman

Ma

thank you

10-23-2010 Over year old.
Mike Wilson

Veteran

Toronto, Canada

I lost 2 motors to ceramic bearings a few years ago when I decided to try them. I have only used the OS stock bearkings in my 90's since then.

....Mike

Teambob00

10-26-2010 Over year old.
Four Stroker

Elite Veteran

Atlanta

I'm with Dave on this one. SS is soft. Additionally, the ceramic bearings sold to the RC market are crap and have about 10 times the radial play of a real ball bearing. And I don't give a rat's patootie if someone you know sells them out of his basement.

10-26-2010 Over year old.
DS 8717

rrProfessor

Here wishing i was somewhere else

I used the ceramic bearings for a couple of years in different size and brands of engines. they didnt last any longer than good steel bearings,and when they failed they damaged the rest of the engine.They would loose chunks off the balls,they didnt really pit like steel bearings do. Tried the ceramic/SS hybrid and they were no better.

YOU ONLY LIVE ONCE..IF YOU LIVE IT RIGHT THATS ALL YOU NEED

10-26-2010 Over year old.
PC12DRVR

Key Veteran

USA

I just got 35 gallons and two years out of my 91HZ stock steel bearings before they started to sound a little noisy. How long do you guys find you are getting on a set of bearings?

10-27-2010 Over year old.
Santiago P

rrProfessor

South West, Ohio

I just got 35 gallons and two years out of my 91HZ stock steel bearings before they started to sound a little noisy. How long do you guys find you are getting on a set of bearings?
WOW! Great to hear.
My OS91SZ originals lasted 15 gallons, second set (plain steel) about 11 gal. Time wise, they both lasted 6 months. That is the average on all my big engines. The humidity here in OH plays hell on bearing life.
Besides the 91SZ are jack-hammers on everything, I expect the bearings on my 91HZ last longer just because is soooo much smoother.

PC12DRVR
Do you fly in a dry state (Arizona)???

Ceramics
I ran a set of ceramics from rc-bearings on my OS50hyper for about 15 gallons in a two year span. Engine ran cooler than with the steel bearings. I removed them after a lean run that broke the ring. The bearings still looked good but I replaced them. I feared what everyone else says, when they go, so is your engine. Note aside, my OS50Hyper is easier on bearings than average.

All steel bearings come with an automatic alarm when they no longer should be used, THEY GET LOUD on idle!
Now, I just gotten used to change rear bearings twice a season on my 90s.

Santiago

10-27-2010 Over year old.
HOMEPAGE  
PC12DRVR

Key Veteran

USA

Yeah they really do get loud.

I am in NH on the seacoast so summer is usually pretty humid, winters (storage season), very dry. I run either CP 30% and or Wilcat CY 30.

I don't do anything special other than clamp the fuel line at shutdown and let the engine burn the residual fuel, I think by burning the remaining alchohol this way, you are less likely to attract moisture inside the engine since methanol is hygroscopic. My helis also sit during the winter because of the arctic freeze but winters in NH the air is extremely dry due to the temps. My engines usually just have a litle bit of pink discoloration from the fuel when I take tham apart but other than that look great.

10-27-2010 Over year old.
B.Waitkus

Veteran

Carver, MA

I put a set in the ys 91 a few years back, failed with in the first gallon. motor junnk

I grew old to fast

12-21-2010 Over year old.
alfred

Veteran

Australia, New South Wales, Mid North Coast

Like everybody else I didn't believe the statements about the ceramics and installed 2 sets in 2 different engines.
None of them disintegrated but better in any way or fashion?
Let's say it this way.......you might as well use the extra money to light a cigarette.
At least you then done something useful with it.
Don't waste your money.

12-21-2010 Over year old.
twopens

Heliman

ga

My old Hyper 50 motors sit a lot and I think I changed the bearings less with the ceramic/stainless bearings than with regular steel bearings. Both last a long time.

With my OS55 motors, none of the bearings lasts if it's tuned for power. I've never suffered a damaged ceramic ball in any engine but the 55 just hammers the races so hard that regular steel, stainless steel, none of them last very long so the ceramic balls don't really matter unless perhaps corrosion is a factor. If the 55 is de-tuned slightly the bearings last MUCH longer. So for me a lot depends on how long the heli sits, which motor is being used and how it's tuned.

12-22-2010 Over year old.
Flyinhelis

Senior Heliman

USA - So. Cal. the OC

Squeezing the max. power out of any engine will reduce the bearing and engine life. I run my engines rich and replaced the bearings between 20 -30 gallons, I'm hoping to get more life on ceramics. The engine runs smoother IMHO.

02-03-2011 Over year old.
Mike Fortin

Elite Veteran

USA

Ceramic bearings do nothing to improve performance or extend the life of an engine.

Ceramics can be detrimental to an engines internals should a bearing happen to come apart.

You will get the same performance out of an $8 dollar bearing as you would with a $35 dollar bearing.

Have Rotors, Will Fly!

02-03-2011 Over year old.
Four Stroker

Elite Veteran

Atlanta

The ceramic/stainless bearings available to the Hobby Market are junk. A good steel bearing ABEC#1 (the lowest grade) has a radial play of 0.0003". The hobby ceramic has a radial play of 0.003". Let's not confuse real ceramic bearings with the crap sold to us.

What do you think 0.003" radial play does to your single cylinder piston engine and clutch stack ?

02-03-2011 Over year old.
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ANYONE SUCCESSFULLY USEING CERAMIC BEARINGS

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