Product Description:

The AKM21C-BNPNC-00 is a servo motor produced by Kollmorgen for the AKM Synchronous Servo Motors series. As a compact rotary actuator, it converts drive current from a matched amplifier into precise shaft torque and controlled motion, allowing automated machinery to execute accurate motion profiles. This model is intended for industrial automation cells and production lines that require stable speed regulation, responsive acceleration, and repeatable positioning.

The unit is supplied without a brake, so static loads must be held by the drive or an external clamping device. A NEMA flange simplifies mounting to compatible gearboxes or machine frames, while the square frame has a width of 58 mm to support installation in confined spaces. Output torque is transmitted through a smooth shaft, which works with couplings that use friction collars rather than keyed engagement. The rotor has a length index of 1, indicating the shortest magnetic stack in the AKM21 frame class. This short rotor helps minimize inertia for rapid acceleration and deceleration during repetitive motion cycles. The motor has the standard configuration for its model, including the regular materials, insulation, and paint used for this product type.

The feedback device outputs 4 lines of digital information per mechanical revolution. Its SFD feedback type provides rotor-position information that the drive processes for closed-loop motion control. Absolute position is maintained over one revolution through a single-turn inductive design, eliminating the need for batteries and reducing sensitivity to contamination compared with optical feedback devices. The feedback package uses a Size 10/15/21 housing, which supports a common connector orientation across compatible AKM motors. The motor has a winding designation of C, matching the frame with drives that provide the voltage and current needed for its intended speed range.