Quote:
Originally Posted by fredweb
Vaseline has a melting point of 99deg F. I wouldn't expect that to last long in a bearing. It will run out the bearing and probably catch fire after the bearing heats up. The grease being used isn't as important as how its used. If you want to reduce friction use lithium based grease and just barely coat the balls and race. I used to grease the bearings and then use compressed air to blow out the excess. This reduces friction and in turn reduces the heat generated. Vaseline is not a very good idea at all.
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I didn't know lithium grease was available in 1960. They may have used the Vaseline for a benchmark. I've used Vaseline grease for this and that for years and never had melting at low temperature problems. I've used it on cows before for barb wire cuts, and their body heat is 104, I think. Anyway that's the number that sticks in my mind. I doubt the flash point for vaseline is anywhere near 99f.