The SMC LEJSH40S6B-1000-RA is a high-performance electric actuator from the LEJS-AC Series, designed for applications requiring precision and reliability. This actuator features a high rigidity slider type ball screw drive powered by an AC servo motor, ensuring smooth and accurate motion control. 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 precision. With a maximum acceleration/deceleration rate of 20000 mm/S², it delivers rapid and efficient performance. The actuator meets clean specifications, complying with ISO Class 4 (Class 10) standards, ensuring suitability for cleanroom environments. It is compatible with a range of drivers, including LECSA, LECSB(-T), LECSC(-T), LECSS, LECSS-T, LECSN-T, LECY, and several discontinued models, providing flexibility in integration.