OS 50-55 Hyper Stainless Bearings

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  • OS 50-55 Hyper Stainless Bearings
  • OS 50-55 Hyper Stainless Bearings
  • OS 50-55 Hyper Stainless Bearings


OS 50-55 Hyper Stainless Bearings

Front Bearing: SR6ZZ

Rear Bearing: S6902

RCBearings heli bearings are high quality alternatives to expensive OEM part number bearings.  Made to exacting tolerances, you can expect a long, trouble-free life at a fraction of the cost.  Our bearings are made from either AISI 52100 bearing steel or corrosion resistant 440C stainless steel and front bearings come with non contact shields.

NOTE:  All heli engines .40ci and above should use a rear bearing with a high speed plastic retainer!  We source these retainers from Japanese manufacturers that make the best.  There used to be almost daily postings on heli forums of pictures of destroyed engines due to metallic retainer failures.  That is until OS and Thunder Tiger went to plastic retainers!  Beware of other sellers that try to pass off cheap standard bearings with metallic retainers for your expensive heli engine!

If your engine isn't listed, call our Technical Support line and we will see if we can make up a set for you.  We have over 400 different bearing types in stock and thousands more available.

We only sell premium industrial grade bearings with most being ABEC-3 or better.  We never sell cheaper hobby-grade bearings! Our bearings are used in such products as museum art reproduction printers, underwater propulsion systems, hotrod manufacturers, military wind tunnel testing, semiconductor manufacturing, commercial printers and world-class competition model aircraft. We have partnered with several manufacturers for over twenty years to produce bearings to meet or exceed our customers exacting requirements.


Did not workout?  No Problem!  We offer a 30 Day Money Back Guarantee.


Fast, Fast, Fast! We will try ship it the same day it is ordered!

Trusted Seller & Support

RcBearings LLC. Call us if you need assistance!

Technical support only (what bearing do I need, will this bearing work for me, etc): (720) 480-5879

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3 Reviews

  • 2
    Took too long to get it.

    Posted by Unknown on 28th May 2017

    The bearing is fine and of sufficient quality. My problem is that it took 7 days just to get it shipped! Way too long to have my bird on the ground.

  • 4
    os 50sx h bearings

    Posted by Unknown on 28th Dec 2015

    The bearings are mounted and working well. They get 4 stars because i dont know how they perform in the loong run.

  • 5
    Excellent quality and best price ever.

    Posted by Mputu on 24th Jun 2015

    I have not used the item on recent purchased yet but I bought the same product years ago it lasted for long time. It is excellent quality products that o would recommend on anyone trying to rebuild an engine.

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