Bill I'm not sure I'd want a wire wound pot that close to that big 3 phase motor. A 1k pot rated that low will be super easy to source, in fact I have some stainless PEC 1k pots in my amp parts bin that would work fine. They are not IP rated, they would need to be well shielded from oil or coolant. I did a quick search on Grainger, not happening they are $200 - $280 for an industrial pot. My PEC pots which are stainless cost like $10. I will search for some IP rated pots that don't cost an arm and a leg. Either way I can have Front Panel Express machine the dial indicator scale on the panel, I'll throw a larger knob on the pot and it will look quite industrial.
Question: Have you tested the Danfoss pot to see if OFF is 1000 ohms or OFF is 0 ohms (or some low value)? Some pots don't actually reduce all the way to 0 ohms. Maybe I'll get my electronics gear out and test mine. They could be keying off voltage vs ohms I suppose.
I may rig up one of my PEC pots to test, they have 270 degrees of rotation. Hmmm that's only 90 degrees more than the stock pot but may be okay. Otherwise a multi-turn pot may be needed or a second fine adjust pot. Hmmm a 10 speed switch with a fine adjustment pot between speeds. A lathe like low speed Jog button. A Tap button at a particular speed. A spindle e-stop. I could have all kinds of fun with this mod! :rofl:
Edit: McMaster has some far more economical pots than Grainger.