...fanrphrompuke has the right idea using an AC Inverter/Vector drive and speed is not the problem, it's how much you want to push the bearings. Buy a name brand and save yourself the headaches. I bought a Hitachi WJ200 about 3-4 years back for $300 new and runs great, easy to install somewhat and nice compact unit . Not sure about Ridge Tapping and the Delta 50 programming is possible or not without buying that Option from Dynapath.
https://www.hitachi-iesa.com/ac-driv.../wj-200-series
Enjoy,
DJ