Product Description:

The 6SM 37L-4.000 is a brushless synchronous servo motor produced by Kollmorgen for the 6SM Synchronous Servo Motors series. It converts drive current into tightly regulated rotary motion, allowing machine builders to synchronize linear stages, rotary indexers, and small gearheads without mechanical backlash compensation. By integrating with a digital drive, the motor supplies the high-bandwidth torque response required for modern packaging lines, electronic assembly platforms, and other automated processes that depend on accurate speed and position feedback.

The motor has a rated output of 0.5 kW at a shaft speed of 4000 rpm. At that operating point, the motor delivers 1.2 Nm of torque while drawing 1.5 A from the drive. A torque constant of 0.96 Nm/A links drive current directly to produced torque, simplifying loop tuning. Mechanical loading limits are 90 N axially and 270 N radially, so standard belt drives or moderate-sized pinions can be mounted without auxiliary bearings. The three-phase stator presents 30 mH of winding inductance and 15.5 Ω of winding resistance, parameters that influence current rise time and copper losses during cyclic duty.

Static characteristics govern positioning accuracy when motion stops. A standstill torque of 1.5 Nm is available with a standstill current of 1.6 A, while rotor inertia is only 1.0 kgcm²; together, these figures permit fast acceleration with limited overshoot. Static friction is 0.03 Nm, so minimal drive energy is needed to overcome stiction during creeping moves. Thermal behavior is characterized by a time constant of 15 min, giving the winding time to equalize before temperature sensors require derating. Back EMF is governed by a voltage constant of 58 V/1000 rpm, allowing the servo drive to predict speed from generated voltage during regenerative events. The motor weighs 2.9 kg, keeping moving mass low when the unit is mounted on linear carriages or robotic wrists.