Product Description:

Manufactured by Bosch Rexroth Indramat, the MST450E-0006-FT-N0SN-NNNN torque motor belongs to the MST Synchronous Torque Motors series. It is supplied as a frameless stator and rotor set that mounts directly into machine frames, enabling compact rotary axes without external gear reduction. The unit targets indexing tables, extruders, and printing cylinders that need high continuous torque and accurate angular positioning at low speed. Direct coupling to the load eliminates backlash, reduces mechanical wear, and supports compact automation layouts.

The motor provides a rated torque of 1400 Nm at a rated speed of 90 rpm, which corresponds to 12.70 kW of mechanical power. To sustain this duty, the windings draw a rated current of 27.8 A, and the electromagnetic design delivers a torque constant of 48.34 Nm/A for straightforward drive sizing. Heat generated at this operating point is removed by water that circulates through an open aluminum jacket, and the cooling circuit must supply 8.9 l/min to keep temperatures within limits. An axial cable exit with a small outside diameter routes the power leads, and those conductors require a 6.0 mm² cross-section to carry the phase current safely. No encoder is integrated, so an external feedback device must be added when closed-loop position control is required.

For short overloads, the motor can withstand a maximum torque of 3250 Nm, provided the inverter can deliver up to 85.0 A per phase. Dynamic operation is bounded by an electrical speed limit of 350 rpm, beyond which core losses rise sharply. The generated back EMF follows a voltage constant of 2.759 V/rpm, which reflects the DC-bus margin needed at higher speeds. The cooling jacket can be supplied from systems rated up to 6.0 bar inlet pressure, allowing the specified flow rate without overstressing the housing.