8JSA42.R0035D100-0 by B & R Automation

The 8JSA42.R0035D100-0 is a three-phase synchronous motor produced by B&R Automation within the 8JS Synchronous Motors series. Designed for direct integration into servo axes and gantry stages, the unit converts electrical energy into controlled rotary motion for positioning tasks in industrial automation. Its mechanical interface follows IEC flange dimensions so it mounts quickly to gearboxes or machine frames. Integrated feedback supplies position data to the drive controller, which supports closed-loop speed and torque control across the rated operating range.

Electromechanical performance is centered on a nominal shaft velocity of 3500 RPM, allowing high-cycle duty without overspeeding the feedback system. The stator and rotor geometry correspond to motor size 4, which indicates the frame diameter and influences torque density. Axial package depth is indexed as length 2, which helps indicate the installation space required behind the mounting face. For feedback, the integrated element reaches an angular precision of 10 angular minutes, which is adequate for moderate-accuracy indexing applications. Because the feedback element is a resolver, it tolerates high temperatures and electrical noise better than optical encoders and remains suitable for variable loading and vibration.

Thermal management relies on self-cooling, eliminating the need for external fans or liquid circuits while dissipating heat generated at continuous torque. Electrical and feedback leads exit through an angled swivel connector, so cable routing can pivot relative to the housing and reduce strain in moving-axis assemblies. This arrangement also helps keep cable bends controlled where the motor is installed near guards or structural members. Installation occurs via flange mounting, providing a rigid interface that preserves concentricity under dynamic loads. Output torque is delivered through a keyed shaft, and the motor is supplied without a holding brake or an oil seal, so separate load holding and contamination protection may be required.