Originally Posted by
ricohman
And while I'm at it I may as well ask this.
Why do my bearings surfaces eat themselves even after the most careful setup?
The Ofmega BB was 20 years old and although it did show signs of wear it was in very good condition.
I cleaned/regreased the BB in June and set it up perfectly. 5 months later the right cup is pitted.
This has happened to a couple of my cranks lately.
Am I killing these somehow or are they just getting on with age?
Maybe its time to upgrade into the 90's with a cartridge BB.
I don't use a torque wrench. Crank bolts have to be quite tight - I give them more torque than any other part on a bike - about 80% of my strength...
. In other words, make them tight, but don't overdo it.
As for your bottom bracket woes, well it could be a number of things. Was the adjustment still good right before you removed it? I periodically check BB adjustments, especially after I've just repacked them. Being an Ofmega BB, I am guessing that the threading is Italian, which makes for a tendency (though it has never happened to me) for fixed cups to come loose. A little bit of knocking could spell trouble.
Was the bike subject to wet weather or other dirty conditions? If so, dirt and grime may have entered and chewed the cup up - it doesn't take much really.
All I can suggest is to use a lot of grease, make sure every part is very clean (don't reuse ANY parts that show any pitting or other severe wear) and check adjustments regularly.