Product Description:

The 6SM 71-M300-G-426 is a synchronous servo motor produced by Kollmorgen for the 6SM Synchronous Servo Motors series. It integrates with a servo drive to convert electrical command signals into regulated mechanical rotation, allowing accurate position, velocity, and torque control in industrial machines such as pick-and-place systems, indexing tables, and material-handling axes. In this role, it can replace pneumatic or hydraulic actuators in applications that require dynamic repeatability and a compact form factor.

At its continuous operating point, the motor supplies 5.1 kW of shaft power while turning at 3000 rpm. This output is produced with a rated torque of 16.3 Nm, while the power electronics supply 12.2 A of phase current. Short-duration acceleration and disturbance rejection are supported by a peak current of 51.0 A. The torque constant is 1.41 Nm/A, meaning each ampere of stator current produces 1.41 Nm of electromagnetic torque. The optional ROD426/ROQ425 encoder adapter mounts on the rear housing and provides incremental position feedback that is compatible with standard drive controllers.

The motor can produce 22.0 Nm of torque at standstill. A permanent-magnet brake provides 20 Nm of holding torque and operates from a 24 VDC supply with 22 W of coil power. The brake contributes 9.5 kg·cm² of inertia, while the rotor inertia is 42.0 kg·cm²; both values affect the acceleration profiles used by the servo control loop. Thermal behavior is governed by a time constant of 35 min, allowing the motor frame to absorb heat from intermittent overloads before reaching thermal equilibrium. Electrical response is influenced by a phase inductance of 9.0 mH, which affects the rate at which winding current can change. The winding resistance is 0.57 Ω, and this resistance contributes to heat generation when current flows through the motor phases.