Quote Originally Posted by Neale View Post
But seriously, I'm inclined to think that cooling requirements are over-estimated, at least for the typical home-built machine. I would prefer to avoid 240V submersible anyway - mains and water don't mix and although clearly the pump is designed to run like this, why do it at all if not needed?
100% agree, the typical Water cooled spindle requires very little water to cool it. Every machine I build/sell uses a 24v submersible pump in a simple tank of water and for 99% of users this is more than enough, for users who are running jobs lasting multiple hours or days then we offer an upgrade with an aluminium tank, radiator and twin fans but it still uses the same water pump. Obviously, for people like kit who live in very hot countries, this will be slightly different but still, they don't need a massive flow of water.

Re 240v pump, then again 100% agree, in fact, our spindles come supplied with a 240Vac pump which we replace with a 24Vdc pump because I don't like water and mains voltages together. So have a nice box full of 240vac pumps if anyone wants a cheap pump....Lol