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Limit Switch
Limit Switch Assembly
Limit Switch
Limit Switch Assembly

Limit Switch

Accessories

Limit Switch
Limit Switch Assembly
Limit Switch
Limit Switch Assembly

The Rotary Union Limit Switch design provides the ultimate in adjustability with even higher accuracy than a cam switch.

Mechanical Actuator (Screw Jacks) Design Guide

Features and Benefits
  • Switches Rated
    15 amps, 125-277 VAC; 1/2 amp, 125 VDC; 1/4 amp, 250 VDC.
  • Available Switches
  • SPST-N.C. or SPDT .
  • Adaptable to all Duff-Norton Screw Jacks 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.
  • Mounting Options
    Can be mounted on either side of actuator, in four 90° orientations.
  • Order Options
    May be ordered on actuators close-mounted to shortened worms, reducing actuator width.
  • Additional Options
    Rotary limit switches are available with 4 positions, or for hazardous locations, consult factory.