Product Description:

The 6SM 27M-4000 is a brushless synchronous servo motor manufactured by Kollmorgen within the 6SM Synchronous Servo Motors series. Designed for compact automation axes, it converts three-phase drive currents into precise angular motion through its six-pole rotor construction. In packaging machines, laboratory robots, or light conveyors, the unit supplies closed-loop speed and position control so that small payloads can be accelerated, held, and indexed with repeatable accuracy.

The motor reaches a rated speed of 4000 rpm, supplying continuous mechanical output up to 0.13 kW when the stator windings receive 0.75 A of sinusoidal current. A torque constant of 0.41 Nm/A links the commanded phase current to the developed shaft torque, while the electromagnetic network has a phase inductance of 21 mH and a phase resistance of 31 Ω. These electrical values affect the current rise times and copper losses that the drive must manage during dynamic operation. The machine can impose axial loads of up to 30 N and radial loads of up to 90 N without exceeding the bearing ratings. This load capacity supports the direct attachment of timing pulleys or small spur gears.

Dynamic holding ability comes from a standstill torque of 0.32 Nm, which exceeds the continuous rated value of 0.3 Nm and helps resist external disturbances when the shaft is stationary. During short acceleration bursts, the drive may command up to 3.5 A of peak current, using the rotor’s low inertia of 0.08 kg cm² for rapid speed changes. With a mass of 1.1 kg, the motor can be flange-mounted on moving carriages without significantly increasing the system load. Thermal equilibrium is characterized by a time constant of 10 min, allowing brief overloads before the winding temperature stabilizes, while static friction is limited to 0.02 Nm so low-level positioning commands are not masked by stiction.