Novel coolant pump for Chineseium water cooled spindles

[Myrickman]

So I purchased one of those off-shore water-cooled spindles with the VFD, coolant pump and mounting bracket. The spindle, VFD and mount bracket work great.....the coolant pump; complete POS. No way I’m submerging an electrically hot motor of questionable water proofing and no grounding in a bucket of coolant. What I used instead is one of those HVAC condensate pumps modified to bypass the level switch. Here’s a link to the type I used.
https://www.homedepot.com/p/Little-G...4425/204481225
made some plastic plugs to prevent evaporation loss and put it in series with a heater core out of the auto boneyard. I used 1/4 Tyson tubing to run to the spindle. The pump housing holds about two quarts of water and I’ve run this thing for over 100 hours with no issues. The heater core is simply mounted horizontally and convectively cooled. Running a 50-50 mix of antifreeze and water. I’ll post pix if there is interest...

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[koenbro]

Yes I am very interested in this cooling solution and I would very much appreciate it if you post pictures of your set up. Thank you


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[Myrickman]

Here is my setup. Ran it two hours straight today and maybe got up to 80F in my 65F basement. You can see the plastic plugs in the coolant tank. I made mine on a lathe from some nylon rod stock I had lying about but rubber stoppers or even that sticky-backed aluminum HVAC tape would work

[koenbro]

Thanks. Considering doing this.


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