The ACRA ADT-450 / ADT-510 Drill And Tap Centers Are Fast And Precise Vertical Milling Machines Built On A Rugged Frame And Ideally Suited For Accurate Milling, Boring, And Drill/ Tap Operations. Accuracy, Speed, and Reliability Are Achieved By The Combination Of Widely Spaced And Double Anchored Linear Guide Rails Aboard Ribbed Meehanite Casting; Direct Coupled Spindle Motor; Simple, Reliable, And Quick Tool Changer; And Single Source Control, AC Servo And Spindle Motors And Digital Drives.