MST450D-0012-FT-N0RN-NNNN Bosch Rexroth Indramat
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MPN: R911318439
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The Bosch Rexroth Indramat MST450D-0012-FT-N0RN-NNNN is part of the MST Synchronous Torque Motors series and delivers a rated power of 16.10 kW with a rated speed of 190 min⁻¹. It provides a maximum torque of 2075 Nm and a rated torque of 810 Nm, while using an aluminum cooling jacket for encapsulation. The motor has a rated current of 31.0 A and a torque constant of 26.29 Nm/A, with a stator mass of 38.7 kg.
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Product Description:
The MST450D-0012-FT-N0RN-NNNN is a torque motor stator produced by Bosch Rexroth Indramat for the MST Synchronous Torque Motors series. As a direct-drive element, this model supplies high continuous torque at very low rotational speed. It is suitable for indexing tables, extruders, and similar automation stages that benefit from gearless transmission. This layout reduces the need for intermediate gear stages and supports smooth motion in compact rotary assemblies.
Under steady operation, the stator delivers a rated torque of 810 Nm while maintaining a shaft speed of 190 rpm. At that operating point, it produces a rated output of 16.10 kW and requires a phase current of 31.0 A, so the cabling must accommodate 6.0 mm² power conductors. During rapid acceleration or heavy load steps, the windings can be driven up to a maximum of 2075 Nm with a corresponding pulse current of 100.0 A, so the connected inverter must tolerate this peak demand. The aluminum cooling jacket removes heat from the laminated core during continuous duty, and the stator mass of 38.7 kg adds thermal buffering. A radial, large-diameter cable outlet simplifies routing inside rotary platforms, while a winding resistance of 1.4 Ω influences voltage drop and drive sizing.
The electromagnetic behavior is characterized by a torque constant of 26.29 Nm/A, so each ampere of phase current produces a predictable amount of torque. A back-EMF constant of 1.455 V/rpm assists the controller in estimating speed because this variant is supplied without an encoder. The 24-slot coil set carries an inductance of 11.2 mH, which shapes current ripple and helps the drive reject switching harmonics during operation. If direct position measurement is required, the axis must use a separate feedback device.
