http://www.averexcnc.com/en/HS-540ki_GTS/MainFeatures.html High Power, Precision, Rigidity, Capacity, Expandability 15K STD Ceramic Ball Bearing, Big Plus BBT, 30 Bar CTS 20K OPT spindle X/Y/Z Rapid feed rate 2,913 ipm 1 sec ATC Automatic Tool Changer, expandable 80/120/220 tools 5 sec APC Automatic Pallet Changer, 1212 lbs payload per pallet 400 / 500 mm pallets simultaneous 2 Pallets STD / 6 Pallets Opt 0.001 degree 4th Rotary Table B Axis, high speed 66.6 RPM X Y Z Axial Tsubaki Ballscrews & THK Roller Guideway