Product Description:

The MKE118B-058-PG1-KE4 is a synchronous servo motor produced by Bosch Rexroth Indramat and supplied within the MKE Synchronous Motors series. It is intended for potentially explosive areas, where it performs position and speed control duties on hazardous-zone equipment such as agitators, conveyors, and dosing stations. Its enclosure is built for ATEX applications, and the motor includes a factory-mounted holding brake to keep the axis stationary when power is removed.

At a 60 K winding temperature rise, the unit delivers a continuous torque of 28.0 Nm while drawing a continuous current of 28.4 A during steady operation. For short acceleration periods, it can reach a maximum torque of 102.0 Nm, and the associated peak current may rise to 127.6 A RMS. Mechanical output is limited to 4500 rpm, and the torque constant of 1.15 Nm/A corresponds to torque produced per ampere at 20 °C. Winding code 058 is matched with 0.170 mH inductance and 2.20 Ω resistance, while the back EMF constant is 70 V per 1000 rpm. Discharge capacity is 10.3 nF, and airborne noise is approximately 61.1 dB(A) ± 3 under nominal load. Power and feedback conductors exit upward through a sealed terminal box, which helps protect the connection area.

The integrated holding brake provides 32 Nm of static torque for secure holding in ATEX installations. Dynamic behavior is affected by a rotor moment of inertia of 0.01940 kg·m², and the motor has a total mass of 45.0 kg. Safe operation is permitted at ambient temperatures of 0 to +40 °C, and insulation class 155 F protects the stator windings. The motor uses a plain shaft with a frontal centering hole, a DIN 332 DS thread, and a shaft seal. Cable glands sized 13 to 16 mm admit field wiring into the terminal box and support the top-entry cable layout.