Rotary Engine Failure Discussion Discussion Of causes, diagnosis and prevention of engine failures

rotor&stationary gear failure

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Old 05-07-2012, 01:43 PM
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Default rotor&stationary gear failure

hey is it ok to use the rotors or stat gears again after they hav e spun a bearing it seems a bit risky to me
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Old 05-08-2012, 12:00 AM
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Default Re: rotor&stationary gear failure

Originally Posted by boprotary
hey is it ok to use the rotors or stat gears again after they hav e spun a bearing it seems a bit risky to me
The term "Spun a bearing" is used by some to describe any bearing failure. Brinelled surface, blackened surface, shined serface, flaking edges and so-on.

A spun bearing, should be reserved for a catastrophic failure where the soft overlay has welded to the crank and the steel bearing shell has spun inside the rotor or stationary gear shearing off the alignment tab.

In any case where the shell has turned in such a way, the part should be discarded. It is painfull but cheaper than loosing the engine again. If you leave it lay around, eventually it will find its way into another engine.

In failures where the shell has not turned, and the IDs measure OK, it is OK to reuse the pieces.

Lynn E. Hanover
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Old 05-08-2012, 02:56 AM
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Default Re: rotor&stationary gear failure

yes i beleive the second hand set of rotors i have one rotor is minus a bearing (that i think had spun) and has a rather rough texture to the inside where the bearing would seat onto, i want to press a new bearing in and hope it wont happen again but!!!...... i asume its a no no???????? and not to use the rotor, appreciate youre help
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