Description Overview Coretech model 10/90A core cutter. 90 inch (2,286 mm) wide. Built in 2000. Tooling and Operation 6 inch (152 mm) diameter core chucks; other sizes are available. Auto advance. All controls are integral to the machine. Electrical 120 V, single phase, 60 Hz. 20 amps. Condition Used, good overall condition.