The MR-J4-700A+HG-SR702J is a matched servo amplifier and motor pair from Mitsubishi's MR-J4 series, delivering 7.0 kW rated output with a rated current of 37.0 A and a maximum current of 83 A. The HG-SR702J motor is a medium-inertia, medium-capacity AC servo motor rated for 2000 r/min, producing up to 100 N·m of peak torque. This combination is built for applications that demand tight torque and speed control—think indexing tables, rotary knives, or high-cycle pick-and-place on a molding cell where every shot needs the same position profile. Control is sine-wave PWM with current control, which means the amplifier modulates the motor phases smoothly enough to keep torque ripple low at low speeds—critical when you're creeping a platen into position or holding a clamp force without overshoot. The general-purpose interface (type A) accepts standard analog speed/torque commands and encoder feedback, so it drops into most CNC or PLC-based motion architectures without a dedicated fieldbus card.
The oil seal designation (J = With) on the motor is worth noting if you are replacing an existing unit in a washdown or coolant-rich environment—the seal keeps contaminants out of the bearing cavity, extending service life on a press-side axis.