Originally Posted by
RCaffin
Yes, I have used moly grease as well. But there are risks with moly grease which need some care.
Under some conditions with moly grease the balls in ball races slide rather than roll, and can get flat spots or wear out.
Too much grease in a ball or roller bearing can cause over-heating due to grease churn.
If MoS2 gets too hot it can oxidise to MoO2, which is NOT a lubricant!!! (It can be an abrasive in fact.)
Moly can also cause increased corrosion at metal joints (I forget why).
So moly grease is good for slow-speed sliding surfaces, but not so good for rotating bearings. I am not sure moly grease would be good for a high-speed HD.