Do you need to water cool erhm a water cooled spindle?!!

[GEOFFREY]

Hi, I told you in your other post that I have been running a WC spindle for about 10 years and have never bothered connecting up the water supply. I do keep my eye on the spindle body temp (It only ever gets hand warm, and that after about 30 mins routing. When I bought my machine I was given an instruction book which recommended allowing the spindle to run for about 10 mins before doing any work in order to enable the spindle to warm up!!! If your spindle gets hot in use you need to water cool - if it only gets moderately warm, then as you say there is enough mass to conduct any heat away. That is my opinion anyway. G.