Product Description:

The AKM21G-BNMN2-00 is a brushless synchronous servo motor produced by Kollmorgen as part of the AKM Synchronous Servo Motors series. It is designed for closed-loop motion axes that require a compact size, high bandwidth, and precise positioning. Typical applications include industrial automation cells, gantries, and small robotic joints. The permanent-magnet rotor and electronic commutation support responsive torque control when the motor is paired with a compatible servo drive.

The mechanical configuration uses a NEMA flange, allowing direct attachment to compatible gearboxes and machine frames without custom adapters. A frame dimension of 58 mm keeps the motor envelope compact for installation in confined mounting spaces. Torque is transmitted through a smooth shaft, which works with clamp or compression couplings and avoids the stress concentrations associated with a keyway. The rotor stack uses length code index 1, providing moderate continuous torque while minimizing inertia for rapid acceleration. Winding designation G indicates the phase resistance and inductance used when matching the motor to drives operating at typical low-voltage DC bus levels. The motor is supplied without a brake, so stationary loads must be held by drive torque or an external mechanical lock when required.

The feedback assembly supplies high-resolution position data through an encoder rated at 2048 lines/rev. Its optical disk is read by a Comcoder sensor that combines incremental and commutation tracks, reducing the number of separate feedback connections. The encoder is a single-turn optical device that maintains absolute position over one mechanical revolution without multi-turn counting hardware. Its signal format uses EPC 15T, enabling connection to Kollmorgen AKD drives and compatible third-party servo drives. The motor has a standard configuration without special seals, coatings, or windings, making it suitable for installations that do not require application-specific modifications.