8LSA55.E3045D000-0 by B & R Automation

The 8LSA55.E3045D000-0 is a synchronous motor manufactured by B&R Automation for the 8LS Synchronous Motors series. It is a three-phase unit intended for servo axes that demand quick acceleration and consistent speed regulation. Within automated packaging lines, pick-and-place cells, or assembly machinery, the motor converts controlled electrical power from a drive controller into mechanical rotation that can be coupled directly to a load.

Its rated speed reaches 4500 rpm, allowing high peripheral velocity on moderate-diameter tooling without gear reduction. The mounting flange measures 142 mm, which supports compatibility with common machine frame hole patterns. Heat is removed through self-cooling with free air circulation, so no external blower or liquid circuit is needed. Power and encoder leads are routed through an angled connection; the swivel arrangement reduces cable strain when the motor is installed in tight enclosures. A length code of 5 corresponds to the active stack height, and the motor is supplied with a standard mounting flange.

The mechanical design follows a standard build configuration with no reinforced bearings, which is suitable for belt-driven or direct-coupled loads that stay within the permitted radial load range. Field wiring is completed through a single connector interface, which keeps the electrical connection compact and organized. There is no holding brake, so static load retention must be provided by the drive or an external clamp. Because the shaft is a smooth shaft, torque is transferred by shrink-fit or clamp couplings without keyways, which helps reduce backlash. Its three-phase synchronous electromagnetic topology eliminates rotor slip and supports precise electronic commutation. An oil seal is not fitted, so the motor is intended for dry environments or for use behind separate shaft sealing elements.