Product Description:

The MKE118B-058-NG1-KUN is a synchronous servo motor built by Bosch Rexroth Indramat and supplied within the MKE Synchronous Motors series. It is intended for potentially explosive areas, where it converts drive-controller commands into rotational motion while meeting gas-zone safety requirements. The motor uses winding code 058 and a UL/CSA-approved housing, and it operates at ambient temperatures from 0 to +40 °C. A plain shaft with a frontal centering hole, a DIN 332 DS thread, and an integral shaft seal supports direct coupling to the load. Power and feedback conductors exit through a top-mounted terminal box, which helps keep cable routing clear of drip lines.

At thermal equilibrium with a 60 K winding rise, the motor can sustain 28.4 A of continuous current and generate 28.0 Nm of standstill torque for steady force at low speed. Its maximum mechanical speed is 4500 rpm, which suits applications that need a wide operating range without exceeding bearing limits. With a torque constant of 1.15 Nm/A, the motor produces predictable torque per ampere, and the low phase inductance of 0.170 mH supports fast current response in closed-loop motion. The motor also uses insulation class 155 F, has an acoustic output of 61.1 dB[A], and includes a discharge capacitance of 10.3 nF.

During dynamic moves, the drive may draw 127.6 A RMS to develop 102.0 Nm of peak torque for short acceleration bursts. The rotor inertia is 0.01940 kgm², so stopping and reversing require the control system to account for stored kinetic energy. Copper losses are influenced by a winding resistance of 2.20 ohms, and a 32 Nm holding brake keeps the shaft in position after the controller is disabled. The motor weighs 45.0 kg, which is important when sizing the machine structure and selecting a mounting arrangement.