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Series 477 Helical Worm Gear Power Winches

Manufacturer: Thern

Move up to 2,000 lbs. with confidence using a portable power winch from Thern. Constructed of cast aluminum, these lightweight winches are designed to deliver the muscle where and when you need it – on the construction site, in the mines, at the wastewater treatment plant, even aerospace facilities.

Thern portable power winches are available in either worm gear or worm/helical gear configurations to efficiently raise, lower and pull loads weighing up to 1 ton. We also offer a variety of options to meet the needs of your unique application.


  • Up to 2,000 lbs. capacity
  • Machine cut gears for accurate and long lasting service
  • Enclosed oil bath provides continuous lubrication of gears to minimize wear. Oil seals keep oil in and dirt out
  • Internal mechanical brake for positive load control
  • Cast aluminum construction for lightweight strength, with durable paint finish to resist corrosion
  • Ball bearings ensure smooth and efficient operation
  • Accessory options include limit switches, cable pressure plates, torque limiting controls, and manual overrides
  • Large diameter drums minimize wear to the wire rope and help extend its life
  • Mounting options include floor, wall, or ceiling
  • Clutch models allow operator to manually disengage the drum to rapidly unwind wire rope. Clutch models do not include pressure plates.
  • Dual function cable anchor for quick disconnect of wire rope with swagged ball fitting, or recessed cable anchor with set screw for wire rope with unfinished end.
  • Two-year limited warranty

Model 4771

  • Helical/worm gear power winches lift or pull up to 2,000 lbs.
  • Designed with a 4" inch wide drum for tight fleet angle installations

Model 4771PN

  • Pneumatic helical/worm gear power winches lift or pull up to 2,000 lbs.

NOTE: Wire rope assemblies sold separately.

  • Model Info

3 Models Available for Series 477 Helical Worm Gear Power Winches

  • Prices subject to change without notice

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Model No. Description Capacity Approx. Shipping Weight Price Ea. Qty
4771 1.2 hp – 115 VAC – 1 phase electric with 6 ft pendant control 2000 lbs 88 lbs $1999.00
4771PN 1.2 hp – pneumatic – 80 cfm at 100 psi (without controls or hoses) 2000 lbs 70 lbs $2161.00
4777 1.2 hp – 115 VAC – 1 phase electric with 6 ft pendant control – 4“ drum 2000 lbs 93 lbs $2284.00