Limit the travel of electrically operated doors, conveyors, hoists, machine tool work tables and similar devices.
Equipment having rotating mechanisms, or linear motion which can be translated into rotational motion, can be
controlled by these versatile switches. FURNAS SERIES 54 SWITCHES can be mounted in any position and are easy to
wire and adjust.
Four Gear Ratios
Standard, Long Dwell or Fine
Right or Left Hand Shaft
Easy to Wire and Adjust
Mount in Any Position
Rugged Die-cast Aluminum Housing
Available for NEMA 1, NEMA 4, and
NEMA 12 Applications
Multi-use Shaft... Attach Drive Sprocket
using Woodruff Key, Pin or Setscrew
Series 55 Limit Switches for overtravel protection and other uses on material handling equipment, hoists, cranes, valves,
compacting equipment, machine tool lead screws, packaging machinery, powered doors, gates and windows, etc. Offers models
that are direct replacements for Hubbell Workplace Solutions Series 15 and G.E. Series CR115 switches.
Choice of six gear ratios
Two, Three or Four switch models
Industrial duty S.P.D.T. or D.P.D.T. snap
switches are U.L.® and C.S.A.® listed
Right hand, left hand or dual
Easy, precision timing adjustment
Rugged die cast enclosures
Industrial grade bearings
High strength steel multi-use shaft with
#404 Woodruff key slot, 0.19 dia. hole
and setscrew dimple
NEMA 4 construction
The EuclidTM Power Limit Switch is a device well suited for crane hoist overtravel protection in
repetitively worked applications and under severe environmental conditions. Maintenance requirements
obviously will vary with service conditions. Even though the device has been carefully designed to
minimize maintenance due to wear and adverse environmental conditions, a periodic inspection and
maintenance program is mandatory in the interests of insuring maximum protection.
D-C Limit Switches are devices that are used to interrupt the main power circuit, setting up a
dynamic braking circuit that quickly stops hook travel with a minimum of drift.
A-C Limit Switches are similar in construction to D-C Limit Switches. The difference is in
operation. A-C Limit Switches disconnect two power lines to the hoist motor which then is
stopped by a magnetic brake.
EuclidTM Quick Break Power Limit Switch, Type 4225
EuclidTM quick break limit switches for hoists are normally closed by the weight of the striking lever.
The movement of the lever on its upward travel, when engaged by the hoist hook block on its upward travel,
causes the switch to quickly break the circuit to the motor with very little upward movement of the crane
hook. The switch is automatically reset by the weight of the striking level when the hook is lowered.
NEMA & CEMA ratings 1, 3, 4, 9
general purpose, weather proof,
watertight, explosion-proof enclosures.
Mill duty construction.
Reversible finger tips and segments
for longer life.
Easy maintenance and access to
fingers, contact tips, drum segments
and tension springs.
Moving and stationary contacts are
made from hard drawn copper.