Product Description:

The MKE118B-058-PP1-KE4 is a brushless servo motor built by Bosch Rexroth Indramat for the MKE Synchronous Motors series. It is intended for use in potentially explosive areas and has an ATEX-compliant housing for pumps, mixers, and conveyor sections in zone-rated process cells. In automated systems, the unit converts regulated drive current into precise rotary motion and supplies closed-loop torque where flammable gases or dust prevent the use of standard motors. This arrangement supports precise speed and position control in hazardous-duty automation equipment.

At a 60 K winding temperature rise, the motor delivers 28.0 Nm of continuous standstill torque while drawing 28.4 A of continuous current. For short accelerations, it can reach a maximum torque of 102.0 Nm and a peak phase current of 127.6 A, and the rotor can spin up to 4500 rpm without overspeed alarms. Thermal limits are supported by a Class 155 insulation system and an allowable ambient range of 0 to +40 °C. Power and feedback conductors enter through a 13.0 mm to 16.0 mm cable gland into the top-mounted terminal box, which helps keep wiring organized. The motor uses winding code 058 with 0.170 mH of inductance and 2.20 Ω of cold resistance, values used by the drive controller. A permanent holding brake supplies 32 Nm, and a shaft with a DIN 6885 keyway plus a shaft seal provides mechanical coupling while limiting ingress. Sound pressure during rated operation remains 61.1 dB(A) ±3.

Rotor inertia is 0.01940 kg·m², which allows quick starts while helping the axis resist load disturbances. The magnetic circuit produces 1.15 Nm/A, and the back-EMF gradient is 70.0 V/min⁻¹, giving the controller a predictable electrical response. Overall mass is 45.0 kg, so the motor needs a rigid mounting surface. A 10.3 nF discharge capacity routes shaft currents to ground, and the terminal box orientation keeps cabling away from moving machine parts.