Originally Posted by
JohnDThompson
It doesn't work that way. The precession will occur regardless; the lockring is no better at preventing this than the flange on the fixed cup. You just need to get the drive side cup in tight or use a thread adhesive. I suspect that the success this person had doing this was more due to being able to tighten the lockring more effectively than s/he could the fixed cup.
I've seen this 'solution' a couple times before during my wrenching my career. I have no idea if it works. Sometimes things that don't make sense in theory work in practice, which is why engineers are not always good mechanics, but I digress...
Anyhow the way to fix this is simple. Pull the cranks, pull and clean the BB cups, give the fixed cup a nice squirt of blue loctite, and screw it back in. Tighten
really tight with a big wrench or vise. If you put them on tight enough they don't come loose even with grease instead of threadlocker.
Clean and repack your BB, put the cranks back on, and that's it.
P.S.
I don't care what Sheldon or anyone else says. Don't grease the tapers, but do grease the crankbolts.