OS 105HZR Bearings.

[Egroeg]

Hi fellow freaks,
Just to know because my rear bearing is shot, and will order from Boca.
Boca hasn't got "the bearing" for the 105 so ...will the 91 size one be good to go?
Thanks G.

[Egroeg]

Ok so no one can tell for sure if the OS 105 and OS 91 have the same size bearings.
Will pull them out and let others know.

[aviator493]

Check the manual of each. Im pretty sure both bearings are the same.

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[Egroeg]

Thanks a493, but the manual only states part number.
When googled it redirects to online vendors of the part.
I am planing on switching to ceramic therefore I want to be sure before I order but I am pretty much sure it must me the same.

[aviator493]

Sorry, I meant to research this more but got stuck at work. If you go to towerhobbies.com it has a parts finder in the top right corner when you look up a part number. You can look up each motor and look at the parts finder. If both motors point to the same bearings you'll know for sure! Ive noticed even though os uses different part numbers for 1 item, tower uses just one for both if the parts are the same.

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[hirobo fan]

os 105 and os 91 hz are the same rear bearing.

[RC-Bearings]

I have them listed. They are the same as the 91

[msallua]

http://www.amainhobbies.com/rc-helic...930000/p141309

Dimensions:
Inside Diameter: 17mm
Outside Diameter: 35mm
Thickness: 8mm

Why this bearing is not shielded?

For example

http://www.amazon.com/Bearing-16003Z.../dp/B002BBGVVI


A friend it is using and tells me that it is better, because it prevents corrosion and if the bearing fails the balls do not fall inside the engine.

[LoveToFly1]

I think that is a simple answer. lubrication....

[Sirolf]

How long did the shielded bearing last..?
Eventually the oil in the fuel will wash out all the grease inside.