Product Description:

The AKM21E-EFM2R-00 servo unit is manufactured by Kollmorgen and belongs to the AKM Synchronous Servo Motors series. It is designed to deliver accurate rotary motion for automated pick-and-place heads, indexing tables, and compact conveyor drives. When paired with a matched digital drive, the motor’s permanent-magnet rotor and stator windings generate torque in direct proportion to commanded current, which supports tight velocity and position loops in industrial automation equipment.

Its square mounting face measures 58 mm, allowing installation in confined machine frames without adapter plates and leaving useful space for nearby mechanical components. A rotor length index of 1 identifies the shortest magnetic stack in this frame size, which helps reduce inertia and support fast acceleration. The winding designation e corresponds to a middle-range voltage constant, balancing current demand and speed capability across typical servo drives. Position feedback is supplied by a resolver, and the selected electrical resolution of 2 poles keeps the sine-cosine feedback signals aligned with the motor’s magnetic pattern for commutation. A factory-installed 24 V holding brake locks the shaft when power is removed, which helps prevent load creep on vertical axes and during emergency stops.

The customization level is Standard, so the motor uses the regular shaft, seal, and winding arrangement for this model. Its resolver provides single-turn inductive absolute position data, so the controller knows the shaft angle within one revolution after power-up without requiring multi-turn tracking. Because the feedback is single-turn, rotation beyond one mechanical turn must be tracked by the control system during operation. The physical feedback package is listed as Size 10/15/21, matching the compact frame and fitting inside the rear housing without increasing the motor’s overall axial length.