8JSA44.R0040D100-0 B & R Automation
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The B & R Automation 8JSA44.R0040D100-0 is a synchronous motor in the 8JS Synchronous Motors series with a nominal speed of 4000 RPM and a keyed shaft end. It features flange mounting, self-cooling, and a resolver encoder system with 10 angular minutes of accuracy. This motor is equipped with an angled swivel connector and does not include a holding brake or oil seal.
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Product Description:
The 8JSA44.R0040D100-0 synchronous motor is manufactured by B & R Automation as part of the 8JS Synchronous Motors series. It is intended for servo-class automation where a compact rotary element must deliver controlled torque and constant velocity to indexing tables, linear actuators, or light conveyor shafts. When paired with a compatible inverter, the motor supplies precise rotary motion for positioning and speed-controlled applications. Its compact housing helps reduce the space required around closely arranged machine axes. The motor also follows the wiring conventions used by other models in the series, which supports consistent cable routing within automation equipment.
The unit attains a nominal speed of 4000 rpm, providing the mechanical bandwidth needed for rapid positioning cycles. Thermal management relies on self-cooling, so ambient airflow across the frame removes heat without external fans or liquid circuits. Adequate clearance around the housing allows this natural airflow to reach the motor surfaces during continuous operation. Rotor position is detected by a resolver, and its feedback accuracy remains within 10 angular minutes. This level of accuracy supports stable velocity regulation and controlled movement at low shaft speeds. Mechanical attachment uses flange mounting, allowing direct connection to gearboxes or machine plates without base feet.
Power and signal conductors exit through an angled swivel connector, which eases cable routing in confined enclosures and permits connector rotation after installation. This adjustable orientation helps prevent sharp cable bends when surrounding components limit the available routing space. Torque is transmitted through a keyed shaft, ensuring positive engagement with pulleys or hub couplings. The magnetic stack has a classification of motor length 4, which indicates the axial configuration used for this model. The square frame corresponds to motor size 4, allowing the housing footprint to be considered when arranging nearby machine components. The motor is supplied without a holding brake, so an external device must secure loads that could move while power is removed. It also omits an oil seal, requiring external protection when the shaft area may be exposed to lubricants or other fluids.
