Product Description:

The MKE118B-058-CG0-KUN is a servo motor from the MKE Synchronous Motors series manufactured by Bosch Rexroth Indramat. It is intended for potentially explosive areas, where it converts electrical power into controlled rotary motion for pumps, mixers, and positioners in hazardous industrial zones. The motor uses a plain shaft with a frontal centering hole to simplify coupling, and a UL/CSA-compliant housing supports common North American installation requirements.

During continuous duty with a 60 K winding temperature rise, the motor sustains 28.0 Nm of torque while drawing a steady 28.4 A. A peak speed of 4500 rpm supports fast indexing cycles when ambient temperature remains within 0 to +40 °C. Class 155 (F) insulation allows high winding temperature capability during repeated acceleration. Electrical power enters through a terminal box mounted on top of the frame, and the 058 winding has 2.20 Ω of resistance and 0.170 mH of inductance, which affect current rise behavior. An optical multi-turn Hiperface encoder provides absolute feedback, and its 128 increments per revolution help the drive monitor position after power cycling. The listed discharge capacitance of 10.3 nF also supports electromagnetic compatibility in installations with long motor leads.

For intermittent load changes, the motor can reach 102.0 Nm, while the inverter may supply up to 127.6 A RMS for short periods. Rotor inertia of 0.01940 kg·m² helps determine acceleration response and affects tuning on axes with changing loads. A back-EMF constant of 70.0 V/min⁻¹ and a torque constant of 1.15 Nm/A describe the motor’s electrical response across its speed range. The shaft includes a sealing ring, and the DIN 332 DS center thread helps with mounting and extraction. Sound pressure is 61.1 dB[A], and the motor mass is 45.0 kg. The unit is supplied without a holding brake, so any stationary load must be supported by the drive or external mechanics when power is removed.