Cooling a water cooled spindle, without pipes everywhere & huge water tanks/buckets!

[Boyan Silyavski]

No need for radiator. Just a waste of money. 1000l/ph pump + 5l car radiator fluid+ big transparent 5l jar from any chinese shop + transparent plastic hoses. Again, anything else is a waste of money. Thats for 0.8kw spindle. 15l have to be ok for the 2.2kw one.

-Water cools also in the plastic tubing on its way
-The tubing should be transparent so you can see eventual bubles
-the car liquid takes away heat better/glycol/ and will not spoil with time/at least for an year, later-yes/
-the car cooling liquid has a color so you can spot leaks
-the jar should be transparent so at all times you see the flow

Never had any problems with this setup doing more than 8h continuous machining.


This is the correct pump 75W Water Pump spindle motor water-cooled circle pump For Engraving machine CNC | eBay

I bought the same locally for 20euro but this one is better because of the brass fitting.

Hope it helps.