8MSA4M.R0-44
The B & R Automation 8MSA4M.R0-44 motor is a high-performance member of the 8MS Three Phase Synchronous Motors series designed for demanding industrial automation. This synchronous motor features hardened steel construction and a precision helical tooth design with a helix angle of 19° 31′, delivering reliable power transmission and extended service life. A built-in self-cooling mechanism ensures effective thermal management, maintaining operational stability even under continuous load. Integration of a resolver-based encoder system provides robust position feedback and accurate motion control. The compact dimensions of 882 mm length and 32 mm face width make it suitable for space-constrained installations.
With a shaft height of 36 mm and a module size of 4, the 8MSA4M.R0-44 offers 44 helical teeth ground and hardened to DIN 6h/7e pitch accuracy. The surface hardness is optimized for wear resistance, and the steel material construction ensures mechanical robustness. The resolver system achieves a precision of ±10 angular minutes and a non-linearity of ±1 angular minute, securing stable position feedback in critical applications. Rated for a maximum speed of 12 000 rpm and a peak torque of 21.2 Nm, it supports high-speed system dynamics. A thermal time constant of 64 minutes guarantees predictable thermal behavior during extended operation. The motor’s weight without brake is 5.6 kg, with a no-brake moment of inertia of 2.65 kg·cm². Recommended cable cross-section is 1.5 mm² for consistent electrical connectivity.
Operationally, the 8MSA4M.R0-44 produces a levelling torque of 5.3 Nm and achieves a maximum rotational acceleration of 80 000 rad/s², enabling swift start-stop cycles. Its robust helical tooth design minimizes acoustic noise and vibration, improving system quietness and longevity. The integrated resolver eliminates homing routines, reducing downtime and enhancing throughput. Self-cooling airflow is maintained through a built-in fan and optimized internal channels, ensuring thermal stability in varying ambient conditions. Optional holding brake integration adds a holding torque of 8 Nm when power is removed, securing the load during standstill.
System integration is streamlined by standardized mounting holes and a common mounting pattern, facilitating drop-in replacement in existing equipment. Compatibility with B & R Automation motion controllers enables advanced features such as synchronous tracking, camming, and electronic gearing. Ideal for robotics, packaging machinery, CNC indexing tables, and automated assembly lines, the 8MSA4M.R0-44 excels in applications where precise positioning, high dynamic response, and industrial-grade reliability are imperative.
