Quote Originally Posted by Jonathan View Post
In most circumstances, that's true, but if you're trying to get away without a tank a radiator is certainly needed. For my 2.2kW spindle I have a tank which is filled with about 8L and it's not really enough for more than a few hours. Clearly it depends on how much power you're drawing from the spindle, but 5L of fluid will only be able to absorb the heat for a very short amount of time if the spindle is used at anywhere near rated power. You must be using only a fraction of the rating to get away with 5L.
In Hank's case it's a small spindle on a small machine, so it might be acceptable.

There are plenty of cheaper pumps on eBay...

Sorry, forgot to say 0.8kw spindle, so like you say multiply by 3 the water amount. Will edit now my post.

However my water doent heat at all obviously because of the long hosing/ i have it run inside the cable chain guides.


I encourage greatly liquid versus radiator. One more thing to fail/fan/.