8LSA74.R0045D000-0 B & R Automation
Wake Industrial LLC is not an authorized distributor of this product.
The B & R Automation 8LSA74.R0045D000-0 is a three-phase synchronous motor with a rated speed of 4500 rpm and a 190 mm flange dimension. Part of the 8LS Synchronous Motors series, it features a resolver encoder and a standard configuration without reinforced bearings. The motor uses self-cooling with free air circulation and does not include a holding brake or oil seal.
Internal Product Review
The 8LSA74.R0045D000-0 is a B & R Automation three-phase synchronous motor with self-cooling free circulation that inspires confidence in continuous-duty applications. Resolver feedback and a 4500 rpm rated speed support precise, high-response motion control.
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Product Description:
The 8LSA74.R0045D000-0 is a three-phase synchronous motor manufactured by B&R Automation under the 8LS Synchronous Motors series. In automated machinery, this unit converts inverter output into continuous rotary motion. It supplies torque for indexing tables, packaging lines, or gantry axes that require repeatable positioning. The synchronous design supports controlled acceleration, steady rotation, and accurate stopping when paired with a compatible drive.
This model reaches a rated speed of 4500 rpm, allowing transmission elements to operate at high speeds without step-up gearing. A flange dimension of 190 mm matches IEC mounting patterns and ensures rigid alignment with gearboxes or machine frames. The feedback system has a precision of 10 arcmin, keeping cumulative error low during incremental moves. Power and feedback conductors exit through an angled swivel connection that reduces cable bending stress inside tight enclosures, and the mating interface is a sealed industrial connector. Heat is removed through self-cooling with free air circulation, allowing installation without external blowers or liquid cooling loops. Adequate clearance around the housing permits air to move across the motor during nominal load cycles.
The motor follows the 8LSA configuration, which uses a standard build without reinforced bearings and a length code 4 stator stack that balances torque density with overall mass. An integrated resolver supplies rotor position information to the drive at startup and tolerates electrical noise better than many digital feedback devices. The motor has a smooth shaft, simplifying coupler installation where a keyway is unnecessary and minimizing stress concentrations along the output interface. The housing is supplied without foot mounting. Because a holding brake is not present, the axis must rely on drive torque or an external clamp to remain stationary when de-energized. The motor also lacks an oil seal, restricting its use to clean, dry environments where lubricant migration and coolant ingress are not concerns.
