8MSA4M.E3-33 B & R Automation
Wake Industrial LLC is not an authorized distributor of this product.
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The B & R Automation 8MSA4M.E3-33 is part of the 8MS Three Phase Synchronous Motors series and features a self-cooling system. It is equipped with a multi-turn EnDat inductive encoder with a resolution of 32 lines and a holding brake torque of 8 Nm. The motor operates at a nominal rated speed of 3000 rpm and has a keyed shaft end.
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Product Description:
B & R Automation manufactures the 8MSA4M.E3-33 synchronous motor within its 8MS Three Phase Synchronous Motors series. The unit combines a permanent-magnet rotor, a multi-turn encoder, and a mechanical holding brake in one housing. It drives medium-inertia loads in packaging, pick-and-place, and material-handling stations, delivering closed-loop speed and position control to the connected inverter. Connection terminals are oriented on side A, and the M length code with size 4 balances power density against overall footprint.
At its rated point, the rotor turns at 3000 rpm, a speed selected for general-purpose servo axes. The electromechanical brake supplies 8 Nm of static torque so vertical loads stay fixed when the drive is disabled. Position data travels through an inductive encoder channel that preserves signal fidelity up to ≥ 6 kHz (-3 dB), while each revolution is subdivided into 32 lines to support fine incremental interpolation. Absolute accuracy is maintained within ±400 counts, reflecting the encoder precision class. Thermal energy is removed by a self-cooling housing, eliminating the need for auxiliary fans or liquid circuits. This arrangement supports compact servo installations where external cooling hardware is not desired.
The encoder stores up to 4096 revolutions of the motor shaft, allowing the controller to recover absolute position after power loss without axis movement. The sensing principle is identified as EnDat Inductive, which offers strong immunity to dust and oil compared with optical disks. Mechanical power exits through a keyed shaft end, so torque can be transferred through standard couplings. The connectors remain on side A to keep cable routing concentrated at one end of the motor. An oil seal is not fitted, so the installation should exclude pressurized lubricant environments.
