Product Description:

The MST201F-0075-FT-N0CN-NNNN is a low-speed, high-torque motor produced by Bosch Rexroth Indramat as part of the MST Synchronous Torque Motors series. The unit is intended for direct-drive tables, extruders, or rotary axes where mechanical gear reduction is undesirable. Its axial connection outlet is located on the larger outside-diameter side, and an open aluminum cooling jacket surrounds the stator to accommodate a water circuit that removes losses generated during continuous operation. Because the motor drives the load without a reduction stage, it can reduce backlash and improve positioning smoothness in slow rotary applications. This layout also supports machine designs that keep hose runs short and leave the rotor face clear for large-diameter tables or process tooling.

At its continuous operating point, the motor delivers 225 Nm while turning at 750 rpm, and this operating pair corresponds to a rated mechanical output of 17.67 kW. A torque constant of 6.11 Nm/A links phase current to shaft torque, so the 36.8 A rated current produces the stated load without saturation. The stator inductance of 8.0 mH limits ripple current and works with the 0.90 Ω winding resistance to shape drive bandwidth. This electrical combination helps the connected drive maintain stable current control during steady-state operation and low-speed contouring. The moderate inductance also helps smooth current transitions during slow moves where torque ripple is more noticeable. Water channels in the open jacket support steady thermal conditions that keep copper near its 20 °C reference, maintaining the 0.373 V/rpm voltage constant over long duty cycles.

Dynamic performance extends to a peak of 625 Nm, enabling short bursts of acceleration or recovery from brief process disturbances before thermal limits intervene. Maximum mechanical speed reaches 1050 rpm, and the servo amplifier may supply up to 123.9 A during these transients. Continuous holding capability at rest is 234 Nm, which is useful for indexing tables that pause under load, and heat generated by elevated RMS current is removed through water cooling while the axial outlet simplifies routing of both power and coolant hoses along the machine frame. That standstill torque can help maintain position during pauses in indexing cycles or extrusion processes that demand slow, controlled motion.