Product Description:

The MST210A-0027-FT-N0RN-NNNN is a stator component engineered by Bosch Rexroth Indramat for the MST Synchronous Torque Motors series. As part of a frameless torque motor assembly, the unit mounts directly into machine structures to create slow-turning, high-torque drive axes without reduction gearing. In industrial automation, this configuration supports rotary tables, extruders, and printing cylinders where precise positioning at low rotational speeds is essential. The frameless design also helps the machine use a compact drive layout because the motor can be integrated directly into the surrounding structure instead of relying on a separate housed motor body.

In nominal operation, the stator delivers a continuous output of 50 Nm while maintaining a shaft speed of 270 rpm, which yields a mechanical output close to 1.4 kW. To reach this working point, the windings draw 7 A RMS and generate a back EMF of 0.51 V/rpm, values that help match the motor to a suitable drive and available voltage. The electromagnetic circuit uses 20 pole pairs, which supports smooth low-speed rotation and stable torque production. Copper losses correspond to a winding resistance of 11.1 Ω, allowing heat generation at rated load to be estimated during thermal modeling.

Short-duration overloads are permitted up to 100 Nm, and the phase conductors may carry 25 A during these peaks without exceeding insulation limits. This reserve comes from a torque constant of 7.1 Nm/A, so commanded current can be translated into predictable torque output during acceleration or disturbance correction. An open-frame protection level of IP00 means the stator must be installed inside a protected machine housing. Cooling is handled through the machine’s liquid jacket, which must maintain a coolant flow of 6 L/min to stabilize the laminated core. Dynamic behavior is influenced by a mounted rotor inductance of 53.3 mH, and the stator mass of 7.2 kg helps keep installation weight manageable for integrated axis designs.