Product Description:

The AKM21C-BNBN2-00 is a brushless servo motor manufactured by Kollmorgen as part of the AKM Synchronous Servo Motors series. Within industrial automation, the model functions as a compact rotary actuator that delivers closed-loop position and speed control for light to medium-duty axes, allowing precise motion in packaging stations, small pick-and-place gantries, and semiconductor tooling. Its construction pairs a permanent-magnet rotor with an optical feedback device so that a drive can modulate stator current and hold commanded trajectories while remaining compatible with standard Kollmorgen servo amplifiers.

The motor occupies a 58 mm square frame, a dimension that sets the mounting envelope and correlates with its torque class. A NEMA flange configuration provides hole spacing that matches common U.S. servo mounts, reducing adapter requirements. Electrical terminations are handled through 2 SpeedTec Ready connectors; the quick-locking design separates power and signal lines and shortens installation time. The shaft is a smooth shaft, enabling zero-backlash clamp couplings where precise concentricity is important. Kollmorgen fits a Comcoder that delivers 2048 lines/rev of incremental resolution, giving the controller fine commutation data for tight velocity regulation. The unit is supplied without a brake, so holding torque during power-off must come from the drive or from external mechanics.

The feedback device is specified as single-turn optical, meaning the position signal repeats every revolution and is immune to magnet temperature drift. Its identifier, EPC 15T, denotes the Comcoder code wheel and electronics that interface with Kollmorgen drive firmware. The motor comes in the Standard customization level, so the housing, seals, and finish follow the standard production configuration rather than application-specific variants. A C winding set tailors stator resistance and inductance for moderate bus voltages and higher base speeds. Rotor Length Index 1 keeps mass and inertia low for fast acceleration.