The SMC LEJS63S3B-500B is a high-performance electric actuator from the LEJS-AC Series, designed for applications requiring precision and durability. This actuator features a high rigidity slider type ball screw drive powered by an AC servo motor, ensuring reliable and efficient operation. Its low-profile design reduces the height dimension by approximately 36%, enhancing stability with a lower center of gravity. Capable of handling a maximum workload of 85 kg, it offers exceptional positioning repeatability of ±0.02 mm, making it ideal for tasks demanding high accuracy. The actuator supports a maximum acceleration/deceleration of 20000 mm/S², ensuring swift and responsive movements. Additionally, it meets clean specifications compliant with ISO Class 4 (Class 10) standards, specifically for the 11-LEJS model. Compatible with a range of drivers, including LECSA, LECSB(-T), LECSC(-T), LECSS, LECSS-T, LECSN-T, LECY, and several discontinued models, this actuator is versatile and adaptable to various industrial needs.