Product Description:

The AKM21E-EFCNR-00 is a brushless synchronous servo motor manufactured by Kollmorgen as part of the AKM Synchronous Servo Motors series. Designed for precision positioning and speed regulation on light- to medium-duty axes, the unit converts drive current into controlled torque for packaging machinery, pick-and-place systems, and semiconductor handling equipment. Its compact design and low rotor inertia support fast acceleration and accurate settling, which helps the motor suit automated cells where limited installation space and responsive motion are both important.

The motor is supplied without a brake, so load holding must be handled by external clamping or drive torque. Power and feedback are routed through 2 SpeedTec Ready connectors, which use bayonet locking to support secure cable attachment and continuous shielding. Inside the housing, the feedback system provides 2-pole feedback resolution through resolver feedback, a format that remains stable in the presence of dust, oil, and vibration. The resolver uses single-turn inductive feedback, so the drive receives rotor position information suited to closed-loop motion control without requiring a multi-turn feedback system.

The motor uses a Size 10/15/21 feedback element that matches the shaft diameter and maintains the correct air gap to the resolver stator. A 58 mm frame dimension keeps the mounting face compact for tight machine layouts while still allowing heat to leave the housing during continuous operation. The unit has a Standard customization level, so its mechanical tolerances, paint finish, and connector orientation follow Kollmorgen standard production. Its electromagnetic design uses winding code e, which corresponds to a specific voltage constant for pairing with compatible AKD drives across the intended torque and speed range.