8MSA3X.R0-D2 B & R Automation
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The B & R Automation 8MSA3X.R0-D2 motor is part of the 8MS Three Phase Synchronous Motors series and features a self-cooling system and top connection direction. It has a rated nominal speed of 3000 rpm, motor size 3 with length X, and uses a BRX resolver for encoder technology with a smooth shaft end. The motor permits an axial force of 200 N during installation and is not equipped with a holding brake or oil seal.
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Product Description:
The 8MSA3X.R0-D2 is manufactured by B & R Automation for the 8MS Three Phase Synchronous Motors series. It serves as a drive element that supplies regulated torque and speed to industrial axes under inverter control. Its three-phase stator and permanent-magnet rotor combination makes it suitable for coordinated motion tasks in automated assembly and material-handling systems where accurate positioning and repeatable velocity are required.
The power and feedback leads exit from the top of the housing, so cables can be routed upward without extra brackets. Thermal losses are removed through self-cooling that relies on surface convection, eliminating the need for external fans. The motor reaches a nominal shaft speed of 3000 rpm, and its frame size is 3, giving it a compact footprint for mid-range power requirements. Its relative rated torque has an extra-large rating, enabling acceleration of heavier inertial loads without requiring a larger drive. A smooth shaft end simplifies connection to gearboxes or belt pulleys. The absence of a holding brake means that mechanical locking must be provided externally when power is removed. No oil seal is installed, so protection against oil must be provided by the connected machine enclosure.
Length code X indicates an elongated active stack that raises continuous torque density, and the shaft can withstand an axial force of up to 200 N without damaging the bearings. Position feedback is supplied by a resolver; the BRX variant limits nonlinearity to ±1 angular minute and maintains overall precision within ±10 angular minutes, allowing the drive to calculate the rotor angle with fine resolution. Because the encoder is transformer-based, it tolerates high temperatures and vibration while supporting reliable motor commutation during demanding duty cycles.
