Spindle High Speed Gamfior DIS8064 - $100 (Antioch)

High Speed Spindle made by Gamfior, Italy.
Description on item: "DIS8064 KR70-250 vel.
max.
17500".
I don't know much about the item.
It looks used but in very good condition, bearings are running very smooth and quiet.
Has two tapers - one for grinding wheel hub, other one for pulley or motor spindle adapter - it is my guess.
I cannot determine type of taper.
I will email approx dimensions on request.
Total length is approx 16", body dia is approx 2.
755" (70mm).
$100 OBO