Product Description:

The C044A-13-3305 is a frameless direct-drive rotary motor supplied by Kollmorgen within the Cartridge DDR Motors series. Its cartridge architecture lets the stator and rotor clamp around a machine hub, and because the unit is supplied without integrated bearings, the host assembly provides radial support. By sending torque through a split ring coupling and keyed shaft, it serves as the primary actuator for indexers, rotary tables, and other precision axes where zero-backlash motion improves throughput and accuracy. This frameless layout also helps keep the motor package compact around the axis while leaving bearing arrangement and structural stiffness to the machine design.

Electrical ratings begin with a line supply of 240 VAC, matching common servo drives while keeping insulation demands moderate. With that supply, the motor can deliver a continuous stall load of 14.1 N·m while drawing only 5 Arms, and these steady-state limits set thermal sizing for cables and power electronics. During rotation, the windings generate a back electromotive force of 173 Vrms/kRPM, which the drive must overcome to accelerate or decelerate the rotor. A torque constant of 2.85 N·m/Arms links commanded phase current to output torque, simplifying current-mode control and supporting fine position regulation. These continuous electrical values are especially important in rotary axes that spend long periods holding position or moving at low speed, where heat buildup can limit performance.

For short duty cycles, the motor reaches a peak stall capability of 38.1 N·m with currents up to 15 Arms, giving extra headroom for rapid indexing or disturbance rejection. The phase inductance of 22.1 mH smooths current transitions and limits ripple that could otherwise excite structural resonances. A low rotor inertia of 0.00149 kg·m² supports high acceleration without excessive drive effort, while the 4.08 Ω DC resistance constrains fault currents and eases thermal management. This combination helps the motor respond quickly to changing commands in repeated start-stop cycles. Sealed construction blocks coolant or process debris from entering the windings, which helps protect the active components in demanding machine environments.