Product Description:

The MKE118D-027-PP3-KE4 is a servo motor developed by Bosch Rexroth Indramat within the MKE Synchronous Motors series. Designed for use in potentially explosive areas, it drives rotary axes in applications where ignition sources must be avoided while closed-loop motion control is still required. This arrangement makes the motor suitable for automated equipment that must combine precise positioning with operation in hazardous locations. It is intended for duty where stable torque production and controlled speed response are both important.

At a 60 K winding temperature rise, the motor supplies a continuous torque of 48.0 Nm while drawing 22.1 A of continuous current, providing a steady stall operating point. For acceleration or short-duration overloads, it can deliver a maximum torque of 187.0 Nm, and the drive can momentarily supply 99.6 A RMS to support that output. Mechanical speed reaches 3000 rpm, which fits many common transmission ratios in servo-driven machinery. The 027 winding has an inductance of 5.70 mH and a phase resistance of 0.350 Ω at 20 °C, so the electrical response remains moderate rather than abrupt. A back-EMF constant of 154.5 V/1000 rpm sets the voltage demand as speed rises, and a discharge capacity of 20.2 nF affects filter selection. The integrated holding brake in the rear housing provides 70 Nm to keep vertical axes secure when power is removed.

The enclosure has an IP65 rating and meets ATEX requirements, helping the motor resist dust, water jets, and hazardous atmospheres in ambient temperatures from 0 °C to +40 °C. The steel shaft uses a DIN 6885 keyway and includes a shaft seal to reduce ingress at the output end. Rotor inertia is 0.03620 kgm², and the torque constant is 2.52 Nm/A, which helps predict acceleration behavior and current demand. Sound pressure is 61.1 dB[A] ±3 dB during operation. Power and feedback leads enter from the top through a terminal box that accepts 13.0 to 16.0 mm cables, and the assembled unit weighs 65 kg.