Glideforce LACT4-500APL Industrial-Duty Linear Actuator with Acme Drive and Feedback: 250kgf, 4" Stroke (3.5" Usable), 0.66"/s, 12V

This 12 V industrial-duty (ID) linear actuator uses an acme screw drive to lift loads up to 250 kgf [550 lbs or 2500 N] and withstand static loads up to 450 kgf [1000 lbs or 4500 N]. It has a maximum speed of 16.8 mm/s [0.66″/s] at no load and 14.3 mm/s [0.56″/s] at the maximum load. Limit switches at each end make the actuator easy to control over its full range of motion, and an overload clutch protects the actuator from being damaged by excessive loads. The shaft holds its position when unpowered. This version has a 4-inch stroke (3.5″ usable) and a feedback potentiometer that lets you determine where the actuator is in its stroke.