Product Description:

The MKE118B-058-NP1-KUN is a servo motor produced by Bosch Rexroth Indramat for the MKE Synchronous Motors series. Designed for potentially explosive areas, it supplies closed-loop rotary motion to drives, positioning stages, and pumps in hazardous zones where flammable dust or gases are present. The unit’s enclosure, wiring, and brake arrangement allow it to integrate with UL/CSA-compliant machinery while operating within an ambient temperature range of 0 to +40 °C.

During continuous operation with a 60 K temperature rise, the motor sustains 28.4 A of current and delivers 28.0 Nm of stall torque. Connections exit from the top through a sealed terminal box, and the insulation system uses Class 155 F materials to tolerate prolonged heating. Winding code 058 corresponds to 0.170 mH inductance and 2.20 Ω resistance, while discharge capacity is 10.3 nF against line transients. Speed control is supported up to 4500 rpm, and the back-EMF slope is 70.0 V/min⁻¹. For rapid acceleration events, the drive may draw as much as 127.6 A RMS without violating the thermal model. A holding brake rated at 32 Nm prevents shaft movement during power loss, and the shaft has a DIN 6885 keyway with a shaft seal to help keep dust and overpressure away from the bearing set. Operating noise remains limited to 61.1 ±3 dB[A] at no-load speed.

The motor also has a peak torque rating of 102.0 Nm and a low rotor inertia of 0.01940 kgm². This combination supports fast cycle times with minimal overshoot during repeated motion changes. Total mass, excluding the brake, is 45.0 kg, giving the frame substantial thermal ballast for intermittent overloads. Mechanical output per ampere is given by a torque constant of 1.15 Nm/A, and the keyed shaft transmits power directly to couplings or pulleys without additional adapters. Housing gaskets, the shaft seal, and top-entry cabling maintain the protective boundary required for explosive-area certification.