OS 91 HZ SZ Stainless Bearings

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0.078 LBS
  • OS 91 HZ SZ Stainless Bearings
  • OS 91 HZ SZ Stainless Bearings
  • OS 91 HZ SZ Stainless Bearings


About RcBearings

Thousands of customers and manufacturers depend on our bearings to get the job done. When you want the highest quality bearing, look to RcBearings to find the right bearing for your application. We have been handpicking and testing the best bearings for over a decade. We guarantee our bearings with a 30 day money back guarantee.

Bearing Kit

Front Bearing:  SR6ZZ

Rear Bearing:  S16003 HS

Complete front and rear bearing set for above listed engine. NOTE that ALL Heli engines should have a plastic retainer rear bearing and ALL SAITO engines should have a sealed front bearing!

All bearings sold from RcBearings are ABEC-3 tolerance class or better!
Beware of other dealers who sell lower quality ABEC-1 bearings at higher prices!



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2 Reviews

  • 5
    Great Product

    Posted by Russell Bear on 28th Apr 2016

    Great product, no issues with installation. Purchased several sets both for an Align and OS 91HZ engines.

  • 1
    Didn't last one half of a tank

    Posted by ChapaWolf on 11th Apr 2014

    I purchased and installed these bearing in my OS91 speed. I hold an A&P certificate and have access to the proper tools to install correctly. Upon finishing my install and the subsequent test flight resulted in the rear bearing coming apart and FOD damaging the engine. I now need to replace the connecting rod, piston, wrist pin, sleeve, crankshaft and bearings. Previosly I used Boca Ceramic bearing which lasted 35 gallons.

    Since no tools are needed to install these bearings, I am curious as to what tools you used to install them. Improper installation can lead to premature failure.

    Paul McIntosh

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