AKM21C-CKM2AA00 Kollmorgen
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The Kollmorgen AKM21C-CKM2AA00 is a synchronous servo motor from the AKM Synchronous Servo Motors series. It features a 24V holding brake and uses a BISS B Encoder feedback system with a resolution of 2048 lines per revolution. The motor has a 58mm frame dimension, an open keyway shaft, and an alternative Flange Variant C.
Internal Product Review
The AKM21C-CKM2AA00 is a Kollmorgen AKM synchronous servo motor with a standard configuration and an open-keyway shaft. A BISS B encoder with 2048 lines/rev feedback resolution supports accurate positioning and dependable motion control. The 24V holding brake adds secure axis retention, making the motor a strong choice for precise servo applications.
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Product Description:
The AKM21C-CKM2AA00 servo motor is produced by Kollmorgen within the AKM Synchronous Servo Motors series. It functions as a compact rotary actuator that delivers controlled torque for indexing tables, pick-and-place heads, and other closed-loop axes in industrial automation. Its low rotor inertia supports rapid acceleration and responsive changes in speed without requiring an oversized drive system. The compact housing also helps the motor fit into machinery where mounting space is limited.
A 24 V holding brake locks the rotor when power is removed, helping prevent vertical loads from drifting while the axis is inactive. The motor uses a BiSS B encoder for commutation and position feedback. Its optical disk provides 2048 lines per revolution, allowing the controller to interpolate small changes in rotor position and regulate motion accurately. Encoder signals use the AD34/AD58 connector format for a direct electrical interface with compatible controllers. An alternative flange, Variant C, changes the bolt-circle arrangement to accommodate the intended mounting interface. The square housing measures 58 mm across, allowing installation in tightly spaced machine assemblies. The motor has a standard customization level, so its materials, seals, and lead lengths follow the baseline configuration for this model.
A single-turn optical encoder architecture provides absolute rotor position within one mechanical revolution when power is applied. This arrangement allows the drive to establish the shaft angle without storing position across multiple revolutions. The rotor length index of 1 indicates a short magnetic stack suited to applications that prioritize agility over higher continuous load capacity. Mechanical output is transferred through a shaft with an open keyway, allowing rigid hubs or pulleys to transmit torque without slipping while remaining removable in the axial direction. The motor uses winding designation C, which provides phase resistance and inductance values suited to compatible AKD drive current ranges. These electrical properties allow the connected drive to regulate phase current during acceleration, steady-speed operation, and controlled deceleration.
