Moly is a no-no in ball bearings as it is a solid. It will take up running clearances and provide a bumpy road for the balls. It is great for any sliding surfaces and all that's needed is care. I once assembled a car engine with the dry spray version and got too much of it in the wrong places and I couldn't turn the engine over, so I had to disassemble and start over. I worked for a distributor of the stuff about 40years ago and sat thru several sales classes on it.