Product Description:

The 6SM 37L-4.000-S3-1325 is a synchronous servo motor manufactured by Kollmorgen for the 6SM Synchronous Servo Motors series. It is intended for closed-loop automation tasks where repeatable rotary motion is required, such as pick-and-place stations and light conveyor drives. When paired with a compatible Kollmorgen servo drive, the unit converts commanded current into proportional torque while the built-in encoder feeds precise position data back to the controller. Its frame sits in the middle of the series, so it mounts easily on machine plates or within compact equipment layouts without additional adapters.

At its continuous operating point, the motor outputs 0.5 kW while turning at 4000 rpm. This performance requires a phase current of 1.5 A and produces a shaft torque of 1.2 Nm. The housing meets the IP65 protection class, sealing the windings and bearings against dust and low-pressure water jets. Six rotor poles establish the electrical frequency required from the drive and help reduce torque ripple. The motor tolerates 90 N of axial force and 270 N of radial force, so moderate belt tension or a side load from pulleys can be applied directly to the shaft without external support bearings.

The motor provides a standstill torque of 1.5 Nm for indexing applications, and static friction is limited to 0.03 Nm for accurate low-speed starts. Current-loop tuning is simplified because each ampere produces 0.96 Nm/A of torque. The motor has a 15-minute thermal time constant, allowing brief overloads without a rapid temperature increase. Position feedback is supplied by an integrated multi-turn EnDat encoder, eliminating the need for an external resolver and retaining absolute position data across power cycles. A phase inductance of 30 mH helps filter current ripple, while a winding resistance of 15.5 Ω limits current flow through the windings.