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The vinyl hose slides over the stainless tubing for a perfect clamp-free fit (the pump can't make much pressure even with the valve blocked)
and the soft copper line lets me adjust it wherever I want. Not as good as loc-line, but hey, I had it on hand.

Today's test project was some drilling, using an indexible carbide spade bit, and everything worked flawlessly.
Big improvement in surface finish, since it wasn't galling anymore, and the parts weren't 150F when I pulled 'em out of the chuck anymore.

Now, assuming I don't have any real problems with the coolant itself (going rancid, rusting parts, drying out and gumming up the pump, whatever)
I'll eventually rework it with a better reservoir and spray nozzle. But for the moment, for a couple hours work and six bucks expended,
I thought it came out pretty well. (Update: The coolant started softening the paint in the tray, which is apparently very common.
I've since repainted the tray with solvent-resistant POR-15, which has cured the issue.)





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