Along with 7.87 in. frame size and internal hollow dia of 3.94 in., RoHS-compliant Model DG 200 has repetitive position accuracy of 15 arc-sec and total backlash of 2 arc-min due to integrated and rigid cross-roller bearing structure. Hollow through-hole helps minimize piping/wiring complexity, while equipment tables and arms can be installed on output table. Actuator develops 440 lb-in. torque at speeds up to 110 rpm and uses AlphaStep stepping motor and controller.