Bearingless design of Kollmorgen Cartridge DDR, with high-resolution feedback device, facilitates mount and run operation in under 30 min. All mechanical transmission parts are eliminated for quiet, maintenance-free operation. Rotary servomotor delivers 50-510 N-m continuous torque, peak torque to 1,100 N-m, and speeds to 1,200 rpm. It comes in 2 frame sizes with 3 stack lengths per frame, and 230, 400, and