Heavy,Duty,Power,Winches

Heavy Duty Power Winches From Thern Inc


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Heavy Duty Power Winches From Thern Inc

Bigger winches for bigger jobs.


Thern series 4WS worm/spur gear winches with load ratings up to 6,300 lbs all feature TWFC brakemotors, enclosed machine cut gearing, and flange style ball bearings. Electric motors are 115 or 230 volt single phase or 230 or 460 volt 3-phase.


Heavy Duty Power Winches
Up to 6,300 lb capacity

115/230 volt single phase, or 230/460 volt three phase, 60 cycle, flange mounted, TEFC, reversible, class B insulated, brakemotor rated for continuous duty in ambient temperatures up to 104® F (40® C). Standard motors comply with relevant standards including NEMA MG1, ANSI, and CSA.
 
Brakemotor with spring set, electrically released disc brake is standard. Other brakes available.
 
Worm and spur gears are hardened for durability. Worm gears operate in an oil bath enclosed in high strength die cast 380 aluminum alloy gearcase. Double lip oil seals keep oil in and contaminants out. Corrosion resistant construction and large capacity bearings ensure long life. Worm gear reducer meets AGMA standards. Gearing is 65 to 85% efficient. Low backdrive efficiency improves load control in lifting applications.
 
Self aligning flange style ball bearings with cast housing maintain smooth drum rotation.
 
Drum includes outside flange anchors to allow uniform winding and help extend wire rope life.
 
Fabricated frame captures both ends of drum shaft for added security, and is easily altered for modified drum widths.
 
Clutch option allows the drum to freespool for rapid pay out of wire rope. Use clutch models for horizontal pulling only.
 
Motor options include: air or hydraulic; voltage or phase changes; class F or H insulated; multispeed motors; or special ratings including IEEE 45 Marine Duty, Tropical Duty, Severe Duty, and Explosion Proof.
 
Control options include: drum control switches for up to 7.5 hp; 115 volt single phase controls with 8 ft. power cord and grounded plug; pendant control switch on 6 ft. cord for 115 volt single phase models up to 1 hp; or NEMA 4 rated Electric Motor Controls with pendant control on up to 50 foot cord. See controls for more information. (link to page 13)
 
Standard winch is designed for base mounting, easily altered for wall or ceiling installation.
 
Standard options and modifications include: cable pressure bars, limit switches, manual overrides, grooved drums, multiple compartment drums, modified drum widths or diameters, and special finishes for protection in harsh or hazardous environments. See options and modifications for more information. (link to page 15)
 
ANSI B30.7 compliance availabe. If you require compliance with ANSI B30.7, please contact the factory with complete application information.
 
Wire rope and controls sold separately. See controls and wire rope for more information.
 
2-year Limited Warranty
 
  Thern products are not for lifting people, or things over people.
 
 
Heavy Duty Power Winches Models
Model 4WS1M
for lifting or pulling up to 1500 lbs.

 
Model 4WS3M
for lifting or pulling up to 3500 lbs. Includes brake.

 
Model 4WS6M
clutch model for horizontal pulling only up to 6500 lbs.

   
  Model 4WS6M Special
shown with pneumatic motor and controls.


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