8MSA4M.E0-68 B & R Automation
Wake Industrial LLC is not an authorized distributor of this product.
The B & R Automation 8MSA4M.E0-68 is a three phase synchronous motor from the 8MS series, featuring a self-cooling system and smooth shaft end. It offers a rated nominal speed of 4500 rpm and includes a holding brake with a torque of 8 Nm. The motor uses EnDat single-turn encoder technology with 512-line resolution and ±160 seconds precision.
Internal Product Review
The 8MSA4M.E0-68 is a B & R Automation three-phase synchronous motor with self-cooling. An EnDat single-turn encoder gives accurate feedback for controlled servo performance. Rated speed reaches 4500 rpm, and the integrated holding brake delivers 8 Nm for confident axis control.
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Product Description:
The 8MSA4M.E0-68 is a three-phase synchronous motor manufactured by B&R Automation for the 8MS Three-Phase Synchronous Motors series. It supplies rotational power to servo axes and conveyor spindles where precise speed control is required. The unit delivers a medium rated torque class in a size 4 frame with a length M housing, providing a balance between footprint and output. Power, feedback, and brake connectors all exit from the A-side of the housing, simplifying cable routing in machine cabinets.
Its rated mechanical speed reaches 4500 rpm, supporting high-speed operation under continuous load. Position feedback is generated by an encoder that provides 512 lines per revolution; quadrature decoding produces 2,048 counts for fine velocity regulation. The optical sensor maintains an angular accuracy of ±60 arcseconds, allowing precise position measurements in assembly equipment. Signal bandwidth is preserved up to ≥ 100 kHz at -3 dB, allowing the controller to read high-frequency motion without losing signal fidelity. Communication and automatic parameter storage rely on the EnDat serial protocol. The encoder uses a single-turn system, which provides absolute position data within one mechanical revolution.
A self-cooling design removes heat through the housing surface, so no external fan is required and cabinet airflow remains uncomplicated. The integrated holding brake supplies 8 Nm of static torque, preventing load drift when power is removed from vertical or gantry axes. A smooth shaft supports clamping couplings or collars without requiring a keyway. Because the shaft does not have an oil seal, it should not connect directly to an oil-immersed gear stage. The housing arrangement supports installation in medium-duty packaging, pick-and-place, and electronics assembly equipment without requiring a separate motor cooling circuit.
