Have you tried the new Cuttronix CM-10 AF Core Drill Motor?

New in! Cuttronix CM-10 (AF) Core Drill motors CM-10, CM-10AF is a high power, high cycle core drilling motors with changeable gearboxes SG15, SG30, SG60 offer high performance, efficiency, productivity and reliability. The motors are based on KASKOD-MTRONIX...