Product Description:

The 8JSA54.R0028D900-0 is a synchronous motor manufactured by B&R Automation within the 8JS Synchronous Motors series. This unit serves as a rotary actuator that converts drive output into precise shaft motion for packaging lines, assembly stations, and similar industrial automation tasks. Its frame follows the series size code 5, making it suitable for mid-range power duties. The length designation 4 provides a balanced stator stack for useful torque density without excessive mass.

Its mechanical interface uses flange mounting, allowing the housing to bolt directly to gearboxes or machine plates while maintaining alignment. During continuous operation, the motor reaches a nominal speed of 2750 rpm. Heat is removed through a self-cooling design that directs airflow along the stator surface, so no external blower is needed. Motion feedback is delivered through a resolver, which provides analog sine-cosine signals to the drive for closed-loop control. A standard holding brake rated at 14.5 Nm secures the load when power is removed, preventing drift on vertical axes. The size 5 geometry and length code 4 allow the brake to fit inside the rear envelope without changing the motor’s overall dimensions.

Feedback and power leads exit through an angled swivel connector, allowing cable strain to be relieved in tight enclosures. The output spindle uses a keyed shaft to transmit torque without slipping at the coupling. A factory-installed oil seal blocks lubricant from migrating along the spindle and helps protect the shaft interface from contamination. Resolver output maintains an absolute position accuracy within 10 angular minutes, supporting accurate interpolation in positioning axes. The rear connector can be adjusted to accommodate different cable-routing directions while preserving access to nearby machine components. Direct flange attachment reduces the need for separate mounting hardware between the motor housing and a compatible gearbox or machine plate.