How To Buy
Limit Switch
Limit Switch Assembly
Limit Switch
Limit Switch Assembly

Limit Switch

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

FEATURES and BENEFITS:

  • 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.