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HomeRC & Power✈️Aircraft🚁HelicopterEngines Plugs Mufflers Fuel › Replacing Bearings in OS 55 HZ
04-08-2012 12:54 PM  9 years ago
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JPhillips

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Waco, TX

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Replacing Bearings in OS 55 HZ
I will be needing to replace my bearings in my motor soon; I've only done it once (not on this engine). I ordered before from Boca Bearings and remember the option for ceramic or standard bearings. I will probably order a ring and bearings also for my RL53 with OS carb that's just sitting on the shelf.

What do you guys recommend and from where? I'll also need the sizes of the bearings, I just checked and can't find it.

Thanks!
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04-08-2012 01:11 PM  9 years ago
Mputu

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Belton, TX

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Ceramic bearing will be my option, boca bearing is a good place unless you had some issue with them...Fly hard, Land safe
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04-08-2012 01:13 PM  9 years ago
JPhillips

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Waco, TX

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No issue with them myself, but I seem to recall a thread about cheap bearings or something with no identifying marks on the bearings.

Sound familiar?
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04-08-2012 01:16 PM  9 years ago
BarracudaHockey

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Jacksonville FL

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You're wasting your money on ceramic bearings and if they come apart you will have a shiny paper weight.Andy
AMA 77227
http://www.jaxrc.com
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04-08-2012 01:44 PM  9 years ago
lightningrc

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UK

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Yes I posted about it along time ago , OS were fitting non branded bearings in there hypers , even the replacements were non branded .
Make sure to get a branded one nkg or some thing .
Only use the OS one if it has been stamped with a make etc as otherwise u have no idea of quality .
I was told that all quality bearings are branded
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04-08-2012 03:30 PM  9 years ago
dcbusdriver

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Stephens City,VA -USA

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Hey Jason, I've been using bearings from here in my RL53 and OS 50's and had good luck with the good ole stainless ones. Here's the link for the OS 55 ones: http://www.rcbearings.com/os-50-55-hyper-bearings/beating the air into submission...........cool!
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04-08-2012 03:36 PM  9 years ago
JPhillips

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Waco, TX

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Awesome, thanks bud! I knew there was another one but couldn't remember the site.

I just started hearing the familiar OS rattle yesterday after a full day of beating on it. Ah well, this motor runs great in the X50! Glad you got your X50 up now! Take care.
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04-12-2012 04:34 PM  9 years ago
BarracudaHockey

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Jacksonville FL

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+1 on the RC Bearings setsAndy
AMA 77227
http://www.jaxrc.com
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04-13-2012 01:58 AM  9 years ago
JPhillips

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Waco, TX

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Received the bearings today from RC Bearings. Thanks guys!
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04-13-2012 03:29 AM  9 years ago
badastinner

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Wentzville, MO-USA

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$$$
Why do these bearings cost so much less? I can get a whole set on the rc bearings for cheaper than just the rear bearing anywhere else?
No changes are permanent but...change is.
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04-23-2012 02:13 AM  9 years ago
HotsHabit

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Idaho

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Send the motor to buzz at Magnum Fuels and get the rear bushing put in it, you will never replace bearings again!
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04-23-2012 11:39 PM  9 years ago
JPhillips

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Waco, TX

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What bushing? I have to admit, I was nervous about OS because of the bearing issues, but the power this motor creates is just addicting!
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04-24-2012 02:23 AM  9 years ago
badastinner

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Wentzville, MO-USA

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Yeah..what bushing?No changes are permanent but...change is.
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04-24-2012 04:00 AM  9 years ago
Neon Juripuri

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Peculiar Mo USA

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04-24-2012 04:41 AM  9 years ago
Scott1115

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Greenwich, CT

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+1 RC Bearings - plain SS bearingsCompass 7HV, Trex 550E
RCRCC
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04-24-2012 05:26 AM  9 years ago
HotsHabit

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Idaho

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I used to use the Stainless Steel bearings from RC Bearings and changed them twice a year until I tried the Magnum Fuels bushing.

I dont change bearings anymore and its nice to know that I wont be scattering a motor when a bearing comes apart before I catch it.
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04-24-2012 03:01 PM  9 years ago
badastinner

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Wentzville, MO-USA

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...No changes are permanent but...change is.
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04-24-2012 07:57 PM  9 years ago
BarracudaHockey

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Jacksonville FL

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I quit changing bearings when I quit using Magnum fuel Andy
AMA 77227
http://www.jaxrc.com
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04-24-2012 09:22 PM  9 years ago
HotsHabit

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Idaho

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I honestly don't think its brand fuel related. I have run Byron, cool power, powermaster and magnum fuel. I mostly ran cool power until the hobby shop went out of business then went to magnum because I could buy it direct and not break the bank.

Still changed bearings twice a year no matter what brand I ran.
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04-29-2012 07:38 AM  9 years ago
Cra-Z-1

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Washington,UT-USA

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SO I'm curious.....Why does everyone say to avoid Ceramic Rear Bearings? Silicon Nitride is some of the hardest stuff I have ever seen; been working with Nitride balls in Military valves for 20 years, and I've yet to see one actually fracture. I'm sure there are a few posts out there claiming Ceramics have come apart. I would LOVE to see some pics if someone knows where.

I am running on rcbearings Ceramic Hybrids in my OS55HZ, and they have run much longer and smoother than any other bearing I've tried. ;-)

.....per Wikipedia

http://en.wikipedia.org/wiki/Silicon_nitride

Bearings

Si3N4 bearing parts
Silicon nitride bearings are both full ceramic bearings and ceramic hybrid bearings with balls in ceramics and races in steel. Silicon nitride ceramics have good shock resistance compared to other ceramics. Therefore, ball bearings made of silicon nitride ceramic are used in performance bearings. A representative example is use of silicon nitride bearings in the main engines of the NASA's Space Shuttle.[21][22]
Silicon nitride ball bearings are harder than metal which reduces contact with the bearing track. This results in 80% less friction, 3 to 10 times longer lifetime, 80% higher speed, 60% less weight, the ability to operate with lubrication starvation, higher corrosion resistance and higher operation temperature, as compared to traditional metal bearings.[20] Silicon nitride balls weigh 79% less than tungsten carbide balls. Silicon nitride ball bearings can be found in high end automotive bearings, industrial bearings, wind turbines, motorsports, bicycles, rollerblades and skateboards. Silicon nitride bearings are especially useful in applications where corrosion, electric or magnetic fields prohibit the use of metals. For example, in tidal flow meters, where seawater attack is a problem, or in electric field seekers.[13]
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