Automotive machine shop, we've used Vactra #2 forever, but it's getting more expensive and more difficult to buy.
On our Storm-Vulcan crankshaft grinders, the ways only move a few inches and at hand-cranked low speeds. They do use misted aqueous coolant. Vactra makes much of how it won't mix with water, but the ways are well-protected. When refurbing the machines, if they've had any maintenance, there is little evidence of moisture in the ways.
Question, do any of you use any way oil othe than Vactra and if so why?
Interesting bit of trivia; the earlier machines have no provision for lubricating between the top and bottom tables, 5' long, so 11' of 1" wide mating surfaces top and bottom. The later machines cut a groove in the perimeter of the top table and a hand pressure oiler feeding it. We just separated the top and bottom table of an early machine and found traces of lubricant still on both surfaces. Not surprising as these two tables are pivoted in the middle and only move 1/4" when squaring the tables to the stone.
At a guess, in the more humid environments, flushing of lubricant is probably more necessary than in the dry intermountain west.
jack vines