Sweeper with optional IP56 ratings offer 2, 4, and 6-in. stroke lengths with short retracted lengths. They generate 250 lb of force at 1 ips or 500 lb at 0.5 ips. They come with 24 or 36-Vdc motors, with auto reset thermal protection. Endof-stroke limit switches control the motor, and adjustable extended limit switches and mid-stroke interlock switches are available. Additional features include an internally restrained antirotation extension tube, aluminum housing, powdered-metal gearing, and self-locking leadscrew. An optional spring-loaded extension tube provides consistent scrubber-head pressure.