81 mm stator stack.

QDD actuator class — humanoid limbs, heavy-payload propulsion.

Coming Q1 2027

US Silicon Steel · Bonded

Outer dia.

81mm

Slots

Lam.

0.2mm

Specification

Detailed spec.

Common to all 81 mm SKUs. Stack height, lamination grade, and bore tolerances are finalized with pre-launch partners.

For

Humanoid QDD

Knee, elbow, and shoulder quasi-direct-drive actuators.

Heavy multirotor

Group 3 UAS propulsion — 30+ kg AUW class.

Industrial AGV

Drive-wheel hub motors for mobile robotics.

Other sizes

Engage