Product Description:

The MST160A-0050-FT-N0CN-NNNN is a frameless synchronous torque motor built by Bosch Rexroth Indramat for the MST Synchronous Torque Motors series. Intended for direct integration into indexing tables, extruders, print rollers, and other low-speed axes, the unit delivers high continuous torque without mechanical transmission stages, which simplifies installation and improves position repeatability in industrial automation cells. Because it is frameless, the motor is meant to be built directly into the host machine structure rather than installed as a complete housed motor. A liquid-cooled stator housing lets the system dissipate thermal losses through a closed-loop coolant circuit, maintaining stable winding temperature even under prolonged duty cycles. This layout can also reduce compliance in the drive train by eliminating separate transmission stages and couplings.

During nominal operation, the motor turns at 500 rpm, supplying 35 Nm of shaft torque and 1.8 kW of output power. It draws a phase current of 6.5 A, and its copper conductors present 8.3 ohms of resistance; together these factors create a rated power loss of 1.3 kW that the cooling system must remove. Liquid cooling requires 1.9 L/min of flow at an inlet pressure of 3 bar to keep the stator temperature within limits. The phase inductance of 31.4 mH limits current rise time, helping the drive regulate torque smoothly under dynamic load changes.

For intermittent demands, the stator can deliver 90 Nm while the drive may supply up to 20 A for quick accelerations. The rotor inertia of 0.006 kgm² is low enough to permit rapid indexing while still helping damp minor speed fluctuations. The motor uses fifteen pole pairs, and it has a 0.42 V/rpm voltage constant together with a torque constant of 5.4 Nm/A, linking phase current to produced torque.