I have dug up what previous threads I can on running temperatures of the bearings in the vertical head of Model 0 mill. It seems that they do run rather hot.
My question is while the temps noted in the threads may not be ideal, what are the limits? Given the Hercus Mills were designed the way they are, it would seem they have been operating at the temps they do since manufacture. At what point of temp should one worry?

My test run time of 5 mins @ 1400 rpm fro 35 to 41 C 10 minutes upto 43 c

TH


Read the full thread at metalworkforums.com...