8JSA44.EA040D100-0 by B & R Automation

B & R Automation manufactures the 8JSA44.EA040D100-0 as part of the 8JS Synchronous Motors series. This synchronous motor is designed for servo axes in industrial automation where accurate velocity and position regulation are required. It is intended for motion systems that require stable speed control, accurate indexing, and repeatable positioning during continuous machine operation. The housing uses flange mounting, which supports direct installation on machine structures and geared assemblies.

The motor's nominal speed is 4000 rpm, enabling fast cycle times for packaging, material-handling, or pick-and-place equipment. Heat is removed through self-cooling, so no external fan or liquid circuit is needed. Position feedback is provided by an inductive EnDat 2.1 encoder system that supports deterministic communication with the drive controller. Within that system, mechanical misalignment is limited to ±180 arcsec, helping maintain repeatable positioning. The single-turn track provides 19/0 bits of resolution, so the drive can divide one revolution into more than 500,000 distinct steps. Power and feedback conductors exit through an angled swivel connector, which helps reduce cable strain during motion.

The frame is size 4 with a length code of 4, giving the motor a compact proportion for its output class. A hardened keyed shaft transmits torque without relying on friction fits, which simplifies pulley or coupling installation. There is no integrated holding brake, so static load retention must be handled by the drive or external mechanics. The encoder is single turn with one countable revolution, which supports simple homing routines. The motor can be used in packaging cells, transfer systems, and other coordinated axes that depend on closed-loop feedback. The design includes no oil seal, so it is best suited for clean environments where leakage protection is not required.