Product Description:

The MST360D-0012-FT-N2CN-NNNN is a frameless synchronous torque motor stator manufactured by Bosch Rexroth Indramat as part of the MST Synchronous Torque Motors series. By generating torque directly on the driven shaft, the unit removes the need for mechanical reducers. This improves positioning accuracy, repeatability, and service life in rotary tables, extruders, and other low-speed, high-load stations frequently used in automated production lines. As a frameless stator, it is intended to be integrated into the surrounding machine structure rather than used as a standalone housed motor. This direct-drive layout also reduces backlash that can appear in geared systems.

It delivers a rated mechanical output of 6.60 kW at a speed of 120 rpm, where a continuous torque of 525.0 Nm is produced while drawing a phase current of 16.5 A. This operating point suits low-speed applications that need high torque without a reduction stage. During accelerated moves, the inverter may supply up to 60.0 A, allowing the electromagnetic circuit to use a torque constant of 31.82 Nm/A for short bursts. With a winding resistance of 5.7 Ω and an inductance of 43 mH, current rise is moderated to protect semiconductors and limit ripple. The voltage constant of 2.580 V min⁻¹ keeps back EMF low at the specified speed, enabling operation from standard low-voltage drives. These values describe the electrical load and transient headroom that the drive amplifier must supply for continuous and short-term duty.

The stator body measures 385 mm in outside diameter and weighs 28.8 kg, so the machine frame must provide a rigid mounting surface and adequate bearing support. The outside diameter also affects the available installation envelope, especially in compact rotary assemblies. Power conductors sized at 2.5 mm² exit through the cable passage at the stator end, which meets the cable-through-stator-end connection arrangement. To maintain thermal equilibrium, the integrated channels require a coolant flow of 6.0 l/min, which keeps the copper temperature within limits when the motor delivers its maximum stall torque of 1,150.0 Nm.