Product Description:

The 6SM 27M-4.000 is a synchronous servo motor manufactured by Kollmorgen and supplied within the 6SM Synchronous Servo Motors series. Designed as a compact rotary actuator, it converts electrical energy into controlled mechanical motion for indexing tables, light pick-and-place axes, or miniature conveyors in industrial automation lines. Its feedback-ready design allows closed-loop position or velocity control when paired with a matching drive, providing a precise and repeatable source of rotary torque.

The motor operates from a 400/460 V mains bus and draws a nominal current of 0.75 A while delivering 0.13 kW of shaft power at its rated speed of 4000 rpm. Continuous output torque reaches 0.3 Nm, with a phase resistance of 31 Ω helping establish the motor’s electrical behavior. During rapid acceleration, the drive may command a peak current of 3.5 A, while a phase inductance of 21 mH helps limit current ripple. The torque constant is 0.41 Nm/A, meaning each ampere produces approximately 0.41 newton-meters of torque. A back-EMF constant of 25 V/1000 rpm supports proper drive voltage scaling across the motor’s operating speed range.

Mechanical integration is aided by a low rotor inertia of 0.08 kgcm², enabling fast starts and stops without excessive drive effort. The shaft withstands an axial load of 30 N and a radial load of 90 N, allowing small pulleys or couplings to be mounted directly. At standstill, the motor can supply 0.32 Nm of torque from a current of 0.8 A, which is useful for holding static loads while energized. Thermal response is indicated by a thermal time constant of 10 min, allowing brief overloads without immediately exceeding winding temperature limits. The current, thermal, and shaft-loading values should be considered when selecting a compatible drive, coupling, and operating cycle.