Product Description:

The MAC90B-0-PD-1-B/110-A-0/J625 is an AC servo motor manufactured by Bosch Rexroth Indramat in the MAC AC Servo Motors series. In machines that rely on analog velocity or torque loops, this unit links the command signal from a drive amplifier to mechanical rotation at the load. The motor’s electromagnetic package is dimensioned for mid-frame applications such as indexing tables, automatic feeders, or small gantry axes where accurate response and sealed construction are both required.

The motor’s electrical characteristics determine how it interacts with the analog drive. At standstill, it can supply 7.2 Nm of continuous torque without exceeding rated thermal limits, and this output requires a steady phase current of 11.9 A. When the axis needs to accelerate, the windings tolerate pulse surges up to 86 A, allowing rapid speed changes. During normal motion, the rotor synchronizes at 2000 rpm, a speed that matches many ball-screw and belt stages driven by 1:1 coupling. Copper and iron losses follow the winding parameters, with a phase resistance of 0.97 ohm being one of the most influential values. An inductance of 5.1 mH shapes current rise time, while natural convection across the ribbed stator housing removes the generated heat.

The enclosure is sealed to IP65, so airborne dust or low-pressure water cleaning will not penetrate the bearings or stator laminations. A keyed steel shaft with a 24 mm diameter extends 50 mm past the front face, offering direct attachment to couplings or timing pulleys. Concentric mounting is maintained by a 110 mm centering diameter machined into the flange, which helps keep radial runout within servo tolerances. For every delivered ampere, the magnetic circuit develops 0.67 Nm/A, giving the controller a linear way to meter load torque. A 60-minute thermal time constant lets short duty peaks pass without immediate overheating and matches the passive cooling design.