Triple crank bearing question

[tom3c75]

I did a stoopid thing recently.  I removed the main roller bearing from the primary side of a series 1 triple crank, but forgot to note which side of the bearing was facing outwards.  The inner race was left on the crank.  Both bearing and race are in good condition, so the plan is to refit.   

Is there a standard way that the outer part of the bearing (shell, cage and rollers) should be fitted over the inner race?   

Attached are pics showing the two sides of the bearing.  My guess (based on how the centre mains are fitted) is that the Side2 view should be fitted to the inside, ie. towards the crank web, and the Side1 view should face outwards.

Would it matter if it ended up being fitted differently to the way it was?

The rest of the crank appears very good: no radial play and side clearance in spec on rod bearings, centre mains good, run out within spec, phasing OK.

Tom

 

[phil37]

Hi Tom - don't suppose it makes a lot of difference either way - but bearings usually have the manufacturer's and type details on the same side - meaning this side would face towards (inwards) the middle of the cases as it's usually on the larger O.D  inner flange - Regards - Phil

 

[wdietz186]

Does the inner race have a larger diameter lip on the side that butts up to the crank? My old crank is buried in a pile so I can't check.  If there is, it looks like the side in pic 2 would face inward so the roller separator would clear the lip. Otherwise it could drag at destroy itself.

 

[tom3c75]

Thanks for the useful inputs.   

I?ve managed to find a photo of the crank that shows what the bearing orientation was: side 2 facing outwards.  So I?ll put it back the same way. 

I did also compare the size of the lip on the inner race and that of the smaller cage and, yes, the cage is a little bigger.  Also checked that the cage does not foul the lip. 

Tom