Pm25mv Quill Maintenance

T Bredehoft said:
My IR temp gage has shown about 140º, almost hot enough to burn your hand, but never any higher than that. Certainly not hot enough to degrade any lubricant.
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I have a PM-727 and the quill gets VERY hot. Almost too hot to touch. Makes changing collets "fun" as they are just as hot. I have been worried about this because my old X2 mill runs at much higher RPM but stays nice and cool.

-Denzil
 
compsurge said:
How long have you run the bearings in for?
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I don't time them, as long as needed. some cuts, milling up to 15"... yeah, the spindle gets hot, but like I said not hot enough destroy the oil.
 
What I was asking was how long the bearings were broken in. If they were not broken in sufficiently, it could be part of the issue. It also could be improper preload, a misalignment, or some other issue.
 
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