Product Description:

The 8MSA2X.E4-43 is a three-phase synchronous motor manufactured by B&R Automation as part of the 8MS Three Phase Synchronous Motors series. It serves as a servo-class drive element within packaging lines, pick-and-place stations, and other automated equipment where accurate velocity and position control are required. In closed-loop motion systems, this type of motor is typically paired with an inverter that regulates torque, speed, and rotor position during rapid axis changes. By synchronizing its rotor field with the stator supply, the motor delivers constant speed and rapid dynamic response for coordinated machine axes.

The motor has a nominal speed of 6000 rpm, allowing high spindle or conveyor rates while maintaining phase alignment with the inverter output. Position feedback is handled by a single-turn EnDat encoder that offers 512 lines of incremental detail, and its differential interface supports signal frequencies of ≥ 200 kHz (-3 dB) so real-time controllers can sample at high rates without loss of edge fidelity. The built-in absolute track delivers angular accuracy of ±60″, supporting precise indexing in multi-station tooling. This combination of incremental and absolute feedback supports repeatable positioning after power-up and during continuous interpolation. The motor has an extra large torque class, indicating electromagnetic loading suited for heavier inertial masses without oversizing the frame. It is supplied without a holding brake, which reduces rear-shaft length.

The housing accepts up to 200 N of axial force on the shaft without affecting bearing preload. The motor uses a keyed shaft end to provide a coupling surface that helps prevent slip under reversing torque, and power and feedback connections emerge on the A side of the stator. This cable exit arrangement can simplify routing when the motor is mounted with the drive end facing the machine. Heat generated at continuous load is removed by self-cooling, eliminating external blowers in space-constrained cabinets. The compact frame corresponds to size 2 in the 8MS size matrix, and the length code X balances torque density with enclosure depth. Because there is no oil seal, the motor should be mounted in clean environments where minimal shaft leakage is acceptable.