Product Description:

The MAC112B-0-GD-3C/130/A-0/S05 is an AC servo motor manufactured by Bosch Rexroth Indramat within the MAC AC Servo Motors series. Designed as a motor for analog drives, it converts commanded current into precise shaft torque so that machinery can position, cut, or feed material with repeatable accuracy. The frame conforms to size 112 housings used on mid-range machine axes, allowing this unit to fit legacy and mixed-technology automation lines where synchronized rotary motion must be maintained under varying loads. Its configuration also suits systems that use a separate drive amplifier and external speed feedback.

Cooling relies on natural convection, and the motor is supplied without a blocking brake, simplifying installation where passive load holding is acceptable. At standstill, it can sustain a continuous current of 41.0 A that produces 16.0 Nm of torque while staying within its thermal envelope. During motion, the windings support a nominal speed of 3000 rpm, and the drive can inject up to 223 A of peak pulse current for rapid acceleration. A torque constant of 0.430 Nm/A links commanded current to output torque, allowing analog controllers to use predictable gain settings. The motor has a keyway shaft to DIN 6885-1 and a second shaft end for tacho feedback. It uses winding code GD, has a resistance of 0.090 Ω, and is built in length code B with a size 112 frame.

The housing weighs 36 kg, and the rotor has an inertia of 120×10⁻⁴ kg·m², which affects acceleration response and axis tuning. Heat soak occurs gradually because the thermal time constant is 90 min, allowing short overload periods before winding temperature approaches its limit. The integrated tachogenerator outputs 3 V per 1000 rpm to supply speed feedback, while a winding inductance of 1.2 mH influences current-loop response. A pilot diameter of Ø180 j6 aids assembly on compatible machine frames and helps keep the motor centered during mounting.