8LSA74.R0045D000-0 by B & R Automation

The 8LSA74.R0045D000-0 is a three-phase synchronous servo motor produced by B&R Automation for the 8LS Synchronous Motors series. As a rotary actuator, it converts drive current into controlled mechanical motion for gantries, pick-and-place units, and fast indexing tables. The product designation 8LSA identifies the standard configuration without a reinforced bearing, and the length code 4 indicates the active stack that balances torque and inertia for mid-sized axes in packaging or material-handling machines.

During continuous operation, the motor can spin at 4500 rpm, providing high linear speeds when paired with the correct gearbox or belt stage. Thermal management relies on a self-cooling principle with free circulation, so cabinet airflow is normally adequate and no external fan is required. The square mounting interface follows a 190 mm flange dimension that mates directly to IEC reducers or custom frames. Power and feedback are routed through an angled swivel connection; the factory-installed connector simplifies installation and strain-relieves the harness. Rotor position is monitored by a resolver, giving analog sine-cosine signals that survive electrical noise and support coarse absolute referencing after power-up.

Position accuracy is specified at 10 arcmin, a figure adequate for indexing duties where repeatable placement is more important than servo stiffness. A smooth shaft exits the housing, allowing couplings or pulleys to be pressed on without key machining, and the absence of a holding brake means static torque must come from the drive or mechanical locks when power is removed. The machine structure engages the motor through a mounting flange, and the lack of an oil seal limits use to clean, dry environments or applications with external sealing. Because the stator is wound as a three-phase synchronous package, torque remains constant over the electrical cycle, while the standard 8LSA construction without reinforced bearings keeps inertia low for fast acceleration.