Product Description:

The MST160E-0027-FT-N0CN-D303 is a water-cooled synchronous torque motor built by Bosch Rexroth Indramat and supplied within the MST Synchronous Torque Motors series. This frameless stator-and-rotor assembly is intended to be integrated directly into machine housings, where it can deliver direct-drive motion without the backlash and wear associated with gear trains. By removing intermediate transmission elements, the motor supports accurate angular positioning and smooth rotation in indexing tables, plastic extruders, and print cylinders. Its direct-drive layout also helps keep the mechanical arrangement compact when low-speed, high-torque performance is required.

At its nominal operating point, the unit develops 125 Nm of torque while spinning at 250 rpm, a combination that yields 3.30 kW of mechanical power. This output is achieved with a continuous phase current of 9.8 A, so the selected drive must be able to supply that level during normal operation. Heat is removed through a water jacket with an outside diameter of 180 mm, allowing stable winding temperatures during constant duty and helping the motor remain suitable for direct coupling to process equipment. This operating range allows the motor to drive loads such as extrusion screws or rotary knives without requiring speed-increasing belts or gears.

For short accelerations, the electromagnetic system can reach 270 Nm and will momentarily demand 22.4 A, so the inverter must support temporary overload without torque clipping. The magnetic design produces torque in proportion to current, expressed by a 12.75 Nm/A torque constant, which gives the control loop a predictable current-to-torque relationship. Because the copper and iron have relatively low thermal mass, temperature settles to steady state in about 7.0 minutes, allowing duty-cycle calculations to reflect the motor's thermal response more closely. Inductance is 49.4 mH, resistance is 12.4 Ω, and leakage capacitance is 17.5 nF, and these electrical values shape current response during precise low-speed positioning.