Product Description:

The MKE118B-058-NG1-KE4 is a synchronous servo motor produced by Bosch Rexroth Indramat for the MKE Synchronous Motors series. It is intended for drive tasks inside hazardous zones where flammable gas or dust may be present, and its aluminum housing meets ATEX directives. The plain shaft with a frontal centering hole supports rigid coupling to gearboxes or load wheels, while a top-mounted terminal box simplifies field wiring and the motor maintains continuous performance in ambient temperatures from 0 to +40 °C without derating.

At a 60 K winding temperature rise, the motor can deliver 28.0 Nm of continuous torque while drawing a steady current of 28.4 A. When rapid acceleration is required, the drive can command up to 102.0 Nm, and the associated phase current may climb to 127.6 A RMS. The motor can operate at speeds up to 4500 rpm, allowing direct coupling in high-speed packaging or pump applications. A factory-installed holding brake rated at 32 Nm keeps the shaft locked during power loss, and the 13–16 mm cable entry range accommodates armored leads that preserve the motor's Ex integrity. Internal insulation is class 155 (F), so the stator can tolerate winding hot-spot temperatures near 155 °C during intermittent overloads.

The electromagnetic constants further describe the motor's operating behavior. Each ampere of armature current produces 1.15 Nm/A, and the generated back EMF constant is 70.0 V/min⁻¹ at nominal speed. A rotor inertia of 0.01940 kgm² balances rapid speed changes with smooth running, and the 0.170 mH inductance supports tight current loops in digital controllers. Sealing at the shaft helps prevent vapor ingress, the sound pressure level is 61.1 dB(A), and the discharge capacitance is 10.3 nF for EMC grounding. The assembly weighs 45.0 kg.