Medium-inertia rotary AC servo motor - Mitsubishi Electric (MELSERVO J4 series HG-SR) - Rated power 4200W / 4.2kW - Rated torque 40.1Nm / 29.58ft.lbf - Rated rotational speed 1000rpm - with Absolute/incremental encoder output (22-bit / 4194304pulses/revolution resolution) - IP67 - with Electromagnetic brake + Natural cooling