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Message: <blockquote data-quote="dennishoddy" data-source="post: 4135254" data-attributes="member: 5412">We bought about 20 MC 5H Okuma machining centers and a half dozen LC 40 lathes in the 80's at a machine shop I worked at as a CNC maintenance guy. Biggest buy Okuma had at that time, so they were all over us with training classes, etc which is where I went through that bearing failure analysis class. One thing they did emphasize was to not pack a bearing for the same reason you mentioned. Too much grease would create heat which would cause early failure of the bearing in high speed applications. Later in the 90's, worked my way into being a purchasing agent for the maintenance department. I had a spindle and a set of spindle bearings (big spindle) that were only made once a year on order and was being shipped to the US. It was sitting on the dock to be loaded when a major earthquake hit that port and was lost. Had to wait another year for another spindle/bearings to be built.</blockquote>