I have another "cheap bastard-farmer fix" for you. My lathe didn't come with a coolant system of any kind so, after reading all the old "how too" books on machining, I decided the only way I was going to get any satisfactory turning results was to purchase an add-on spray system...but holly damn they were "spencif" from the store-bought place.
So the "what would I do if still farming" brain mater slooowly started to turn, and kicked into high gear the day I had to pick the wife up from the Greenhouse supply store she worked at. Just inside the door they had a display of garden/fish pond submersible pumpsso I picked out a mid priced one (around $40 but I cant remember the GPM rating). wish I could remember because it was twice what I needed.
She was a little late getting home from work that day as I needed to make a stop at CT for some feet of plastic tubing(1/4") and an assortment of brass hose couplers& a couple of valves.
I originally cobbled the pump & hose direct together with a nozzle at the end and plunked the pump into my reservoir with a couple gallons of cutting oil solution...a surplus five gallon plastic pail, and let er rip...this is when I discovered I had waaaay more GPM than I needed...that $hit was like red hot sauce...it went everywhere.
So back to the drawing board and installed a needle control valve in-line with a return line plumbed in just before it (between needle valve & pump). Now I could control the flow & pressure at the nozzle easily and the excess just flows back thru the return.
runs on 110V & Total cost was probably under 60 bucks, 250 less than store-bought at the time.
I did "store bought " one of those $8 flex nozzles that BB sells later on for the system but that's about the only change I've made in the more than 20 yrs I've used it.