Product Description:

Bosch Rexroth Indramat manufactures the MAC112B-0-GD/130-1/I-625/S05 within the MAC AC Servo Motors series. Intended for analog drive controllers, it converts electrical commands into controlled rotary motion for automated tooling, gantries, and transfer lines. The motor has a size 112 frame, length code B, and a 130 mm centering diameter for direct mounting to gearboxes or machine bases. It uses natural convection for cooling, winding code GD, and incremental encoder feedback so the drive can monitor shaft position during operation.

The motor can deliver a continuous stall torque of 16.0 Nm, which is suitable for holding load at standstill without extra gearing. Maintaining that torque requires a continuous stall current of 41.0 A. Under motion, the winding reaches a nominal shaft speed of 3000 rpm, which suits servo cycles that require fast repositioning between commanded points. A torque constant of 0.430 Nm/A shows the linear relation between phase current and output torque during drive control. Electrical loss is limited by a winding resistance of 0.090 ohm, which helps the naturally cooled housing remove heat. The steel shaft uses a 32 k6 fit, extends 60 mm, and accepts a 10 × 8 × 50 mm key for positive torque transfer.

Peak pulse current is 223 A, which allows short acceleration periods beyond the continuous operating range. A built-in holding brake supplies 14 Nm to secure vertical or suspended loads when power is removed. Thermal behavior is set by a 90 min time constant, so temperature rises gradually during intermittent duty. Rotor inertia of 120 × 10⁻⁴ kg·m² helps moderate speed changes during axis movement. Current rise is also shaped by a winding inductance of 1.2 mH, which smooths drive switching behavior. The assembly weighs 36 kg, and the incremental encoder maintains position feedback for the analog controller.