These linear actuators incorporate single-stack stepper motors to deliver long life and high accuracy and repeatability. The compact IP20 motors are 1.8° step-angle motors pre-integrated with leadscrews to satisfy an array of linear-motion applications.
With variations having an external shaft, the rotating screw is integral to the motor’s rotor and a mating nut travels axially along the threaded screw shaft. In contrast, versions with a non-captive leadscrew have the threaded shaft pierce through the motor to move axially with motor-rotor output.
No matter the version, the precision rolled leadscrews are quiet — especially when paired with a self-lubricating nut. Because the leadscrews are made of premium non-magnetic stainless steel, they’re corrosion resistant. Engineers can also specify the linear actuator’s screws with a Teflon coating. There are three options for leadscrew pitch and lead in the NEMA 14 and 17 sizes, and four options for the NEMA 23.
The 1.4-in. NEMA 14 actuators accept 12 to 48 Vdc to 1 A. Thrust is to 50 lb with a non-captive shaft; 25 lb with a general-purpose nut; and 5 lb with an anti-backlash nut. Repeatability with the latter is to five ten-thousandths of an inch.
The 1.7-in. NEMA 17 actuators accept 12 to 48 Vdc to 2 A. Thrust is to 50 lb with a non-captive shaft; 25 lb with a general-purpose nut; and 5 lb with an anti-backlash nut.
The 2.3-in. size NEMA 23 actuators accept 12 to 75 Vdc to 2 A. Thrust is to 200 lb with a non-captive shaft; 60 lb with a general-purpose nut; and 25 lb with an anti-backlash nut.
In some cases, the manufacturer also integrates these linear actuators with programmable motion controllers, drive electronics, and optional encoders to form MDrive Plus actuators. For more information, visit motion.schneider-electric.com.