The spindle is driven from below by a DC motor. The motor is driven by a Kollmorgen HPA series drive (I think). I am not familiar with that exact series, but it looks a lot like the TPA/SPA series of drives. It may be slightly newer than the TPA/SPA’s.
Part Number for drive:
HPA03-158100-611-5306B35 – we figure this is a Hardinge version of a TPA, not sure. Looks like a TPA.
Serial Number: 4L-366
Best I can tell, the drive is 158V line-neutral, 100A output. Makes me think that the motor is really bigger than 5HP. The motor is also fan cooled through the windings.
There are a few, maybe 3, V belts driving the spindle. I don’t see why we can’t salvage at least the motor. I think it is 5HP, which should be more than enough to do anything this lathe will do.
Picture of a drive from Ebay. I can’t see it clearly, but it looks like the serial number is the same. I would bet that this drive came out of a Hardinge. They want $1250 for it.
The motor seems to run fine when connected to a car battery. It is probably usable.