Product Description:

The U12DNU-A/PULLEY is a brushless servomotor manufactured by Kollmorgen for the PLATINUM U Servomotors series. It supplies closed-loop rotary motion for automation stages, conveyors, and gantries, and the built-in pulley interface allows direct timing-belt coupling without the need for an external hub. By turning electrical current into controllable torque, the unit serves as the primary actuator that positions loads precisely under drive control in industrial machinery. Its pulley-ready output also suits compact belt-driven axes where a simple mechanical layout is preferred.

With a continuous stall capability of 81.9 N-cm, the motor can hold static loads while its 0.61 Ω armature resistance helps limit heating. Transient demand is supported by a peak current of 84 A, and smooth speed changes are aided by cogging torque of 0.0 N-cm plus 1.3 N-cm/KRPM of viscous damping. The windings are rated for a maximum mechanical speed of 6000 RPM, while typical operation centers on a nominal point that draws a rated current of 8.65 A to deliver 275 W of shaft power. Electrical loss across the terminals is influenced by a 0.75 Ω terminal resistance, and the back-EMF constant of 12.1 V/KRPM helps with amplifier matching.

Peak overload conditions can generate up to 907.4 N-cm of torque for short bursts, and continuous production runs are performed at a rated speed of 3000 RPM where the windings see a rated voltage of 43.3 V. Temperature effects are also stated clearly: torque is 91.8 N-cm at 25 °C and 81.7 N-cm at 40 °C, which shows the expected reduction as operating temperature rises. A torque constant of 11.6 N-cm/A links commanded current to output torque, allowing the connected controller to translate current demand into predictable mechanical response. These values support precise motion tasks that require controlled acceleration, steady running speed, and repeatable torque output.