Duff-Norton Modular Actuators
Duff Norton modular actuators are made for a variety of applications. They are custom made by matching standard actuators with electric, air, hydraulic or explosion proof drive units.
Duff Norton translating tube machine screw models feature a traveling lift nut which allows precise load positioning. Translating tube actuators are used when environmental contamination is anticipated as they have an enclosed lifting screw and translating tube. For use in locations relatively free of dust, dirt and moisture.
Optional limit switches and transducers are available on the translating tube machine screw modular actuator.
Limit Switch
The Rotary Union Limit Switch design provides the ultimate in adjustability with even higher accuracy than a cam switch.
- Switches rated 15 amps, 125-277 VAC; 1/2 amp, 125 VDC; 1/4 amp, 250 VDC.
- Switches SPST-N.C. SPDT available.
- Adaptable to all Duff-Norton mechanical actuators 2 ton and larger.
- Sturdy and compact, corrosion-resistant aluminum housing and cover, NEMA 4 enclosure rating, threaded 1/2 inch NPT conduit opening, brass nuts travel on stainless steel shaft.
- Easy to adjust, slotted traveling nuts allow precise fine-adjustment without the trial and error of cam type switches.
- Three available ratios to serve different travel requirements, while optimizing repeatability.
- Operating temperature, -20° to 150°F. Lifetime lubricated with synthetic grease.
- Can be mounted on either side of actuator, in four 90° orientations.
- May be ordered on actuators close-mounted to shortened worms, reducing actuator width.
- Additional rotary limit switches available with 4 positions, or for hazardous locations, consult factory.
