Product Description:

The 8MSA2X.R0-43 is a three-phase synchronous motor produced by B&R Automation within the 8MS Three Phase Synchronous Motors series. Designed for industrial automation axes, the unit converts inverter output into tightly regulated rotary motion for packaging, material-handling, and assembly equipment. Its compact frame and direct resolver feedback help provide precise position control while coupling the rotor to gearboxes or load shafts without intermediate belt drives. This layout is useful where a direct-coupled motor is preferred to reduce backlash and simplify the drive train.

The motor relies on a self-cooling design that dissipates heat along the housing surface, removing the need for external blowers. For cabling, power and feedback connectors are set on the A-side, so wiring can be routed parallel to the machine base. Under nominal conditions, the rotor reaches 6000 rpm, a speed suited to high-throughput indexing when matched with the proper gearbox ratio. Relative rated torque is classified as extra-large, giving the frame high static load capacity compared with other size-2 models. Motion feedback is supplied by a resolver, allowing the drive to monitor rotor position for closed-loop control. A permitted axial force of 200 N helps protect the bearings against assembly presses and coupler preload.

The feedback element is the BRX resolver variant, which offers ±1 angular-minute nonlinearity and overall accuracy within ±10 angular minutes across the full speed range. Because the shaft end is keyed, torque transfer to pulleys or couplings can be achieved without relying solely on friction. Length code X keeps the stack short, allowing the motor to fit in space-restricted machine layouts while the size-2 stator still provides generous output. The housing is produced without an oil seal, so applications exposed to fluids may need external sealing at the machine interface. The design also omits a holding brake, so power-off load retention must be provided by the driven system when required. That arrangement is common on axes where braking is handled elsewhere in the mechanism.