Product Description:

The MKE118B-058-CG1-KE4 is a servo motor produced by Bosch Rexroth Indramat within the MKE Synchronous Motors series. It is intended for use in potentially explosive areas, where explosion-proof construction and closed-loop feedback support precise motion on chemical processing equipment, paint lines, and grain handling systems. The motor converts electrical energy into controlled rotary torque for start-stop motion, positioning tasks, and speed-regulated operation. Its enclosed design and feedback system make it suitable for axes that must maintain accurate response under demanding industrial conditions.

Its top-mounted terminal box accepts 13.0 to 16.0 mm cable glands, supporting gas-tight armored cable entry in classified zones. Winding code 058 uses 0.170 mH inductance and 2.20 Ω resistance, which help the drive manage current response with limited phase lag. At a 60 K temperature rise, the motor delivers 28.0 Nm while drawing 28.4 A. For short bursts, it can reach 102.0 Nm and 127.6 A, which supports demanding indexing and acceleration moves. The torque constant is 1.15 Nm/A, and the maximum speed of 4500 rpm supports fast axis motion. A 10.3 nF discharge capacity connected to the housing helps divert common-mode currents away from the bearings.

An integral holding brake provides 32 Nm of static torque to help prevent drift on vertical axes during power loss or emergency stops. Rotor responsiveness is influenced by the 0.01940 kg·m² inertia, and the plain shaft includes a DIN 332 DS thread, a front centering hole, and a shaft seal for overpressure exclusion. The motor weighs 45.0 kg, is ATEX compliant, and uses class 155 F insulation for operation from 0 to +40 °C where conductive dust or vapor may be present. Feedback comes from an optical multiturn absolute Hiperface encoder, model M1, with 128 increments so position information is retained after power loss. Acoustic emission is rated at 61.1 dB(A), and the back EMF value is 70.0 V/min⁻¹.