Product Description:

The MKE118B-058-CP1-KE4 is a servo motor for potentially explosive areas manufactured by Bosch Rexroth Indramat within the MKE Synchronous Motors series. Designed for positioning and speed-controlled axis duties in hazardous-area automation, the motor converts electrical power into mechanical torque while meeting ATEX housing requirements. It operates in ambient temperatures from 0 to +40 °C, and its power and feedback ports are located on the top of the frame for upward cable routing.

At standstill and with a 60 K winding temperature rise, the unit delivers 28.0 Nm of continuous torque while drawing 28.4 A of continuous current. The 058 winding code works with a resistance of 2.20 Ω and a low inductance of 0.170 mH to support rapid current changes that use the torque constant of 1.15 Nm/A. When short-term overload is demanded, the drive can supply 127.6 A to reach a peak torque of 102.0 Nm, and the rotor can accelerate to 4500 rpm without mechanical derating. Dynamic behavior is influenced by the 0.01940 kg·m² rotor inertia, while a discharge capacitance of 10.3 nF limits common-mode voltage. Class 155(F) insulation and a sound pressure level of 61.1 dB(A) describe the motor's thermal and acoustic performance.

The feedback package uses the M1 optical encoder with 128 increments and a multi-turn absolute Hiperface interface, allowing closed-loop positioning alongside the built-in holding brake that exerts 32 Nm to secure loads during power loss. A shaft with a DIN 6885 keyway, an installed shaft seal, and a cable entry range of 13–16 mm support sealed installation through the terminal box. The shaft design helps keep drive keys aligned during high transient loads, and the overall mass of 45.0 kg contributes to vibration damping. The voltage constant of 70.0 V/min⁻¹ matches the characteristics expected by compatible drive electronics.