Product Description:

The AKM21C-CKMN2-00 is a synchronous servo motor manufactured by Kollmorgen within the AKM Synchronous Servo Motors series. The motor functions as an electromechanical actuator in industrial automation, translating drive current into accurate shaft position and speed for small conveyors, pick-and-place arms, and metering pumps. It is delivered in standard configuration, allowing direct pairing with Kollmorgen servo drives for rapid integration.

Its mechanical design is specified without a brake, so holding torque during power-off must be provided by the machine or external clamping. Position feedback is carried by a Comcoder transducer that integrates a digital incremental encoder and commutation tracks. The device delivers 2048 lines/rev of base resolution; when interpolated by the drive this value translates to higher position counts per revolution. The sensing system is rated for single turn, optical operation, meaning absolute position is retained within one revolution and no multiturn data are stored. Kollmorgen classifies this feedback variant as EPC 15T, ensuring encoder wiring and signal levels match the company’s standard SFD and S300 drives.

The motor body follows Alternative Flange Variant C, providing pilot diameter and bolt circle dimensions that align with metric IEC interfaces. A frame width of 58 mm keeps the servo compact while still accommodating the stator stack associated with rotor length index 1. Power is transferred through a shaft that features an Open Keyway, allowing positive coupling to gears or pulleys without additional machining. Internally, the stator uses Winding Designation C, matching resistance and inductance to drive outputs optimized for low-to-medium voltage bus systems. The combination of standard customization level and these mechanical features simplifies inventory management and enables consistent torque response across multiple axes.