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Worm Spur (WS) Series

THERN® WORM SPUR (WS) SERIES | HEAVY-DUTY ELECTRIC WINCH

up to 26,000 lbs /  11,793 kg capacity

Perfect for lifting applications, these low-cost winches provide the flexibility that others cannot. Thern’s Worm Spur Series provides an electric winch that will lower your maintenance costs while getting the job done every time. The 4WS Series has a 7,000 to 26,000 lb. capacity. These electric winches feature dual-stage gear reduction for economical handling of large loads. The combination of helical/worm and spur gearing make these electric winches ideal for applications requiring secure load control and accurate positioning. Thern’s modular design means we can quickly customize these winches to meet your specific requirements.

 

Flange Mounted Premium Motor & Enclosure

  • Reversible, three-phase, industrial-grade motor, endures continuous operation. Single-phase version also available
  • Totally enclosed, fan cooled (TEFC) design, featuring IP44+ and F-class insulation, resists debris and contamination for long service life
  • Standard motors comply with industry standards: UL, CSA, and NEMA MG1

Durable Gears & Gearbox Design

  • Heavy-duty spur gears, providing secondary reduction, are guarded with grease zerks for easy lubrication and maintenance
  • Large-capacity bearings, enhance smooth operation and durability
  • Sealed, cast-iron gearbox with integral oil-bath for primary gears dissipates heat and provides continuous lubrication for enhance service life
  • Direct-drive gearing, featuring spur and worm gears, enhance load control and positioning while resisting wear
  • Primary speed reducers meet AGMA and/or DIN standards

Integral Drum & Shaft Design

  • Large-diameter, welded-steel drum, featuring outside flange, anchors, promotoes uniform winding and life of wire rope
  • Anchors allow cable to be over or under wound and provides multiple drum exit angles
  • Flange-style, self-aligning roller bearings with cast-iron housing maintain smooth drum rotation
  • Continuous, solid-steel drum shaft and steel frame provide optimal strength and security
  • Complete wire rope assemblies available upon request

 

Series

Imperial
Load Rating Power Supply Line Speed Range Drum Capacity Clutch
4WS1M6 1,500 lbs .5 - 1.5 hp 17 - 44 fpm 260 ft YES
4WS3M10 3,700 lbs 1 - 3 hp 8 - 23 fpm 500 ft YES
4WS6M12 6,400 lbs 1 - 5 hp 4 - 24 fpm 660 ft YES
4WS9M18 10,000 lbs 5 - 10 hp 13 - 32 fpm 1,500 ft NO
4WS16M20 16,000 lbs 7.5 - 15 hp 12 - 35 fpm 1,530 ft NO
4WS26M26 26,200 lbs 10 - 25 hp 10 - 36 fpm 1,480 ft NO

 

Series

Metric
Load Rating Power Supply Line Speed Range Drum Capacity Clutch
4WS1M6 680 kg .37 - 1.1 kW 5 - 13 mpm 79 m YES
4WS3M10 1,675 kg .75 - 2.2 kW 2 - 7 mpm 152 m YES
4WS6M12 2,900 kg .75 - 3.7 kW 1 - 7 mpm 201 m YES
4WS9M18 4,535 kg 3.7 - 7.5 kW 3 - 9 mpm 457 m NO
4WS16M20 7,255 kg 5.5 - 11 kW 3 - 10 mpm 466 m NO
4WS26M26 11,880 kg 7.5 - 18.5 kW 3 - 10 mpm 451 m NO

 

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