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477

Thern Power Winches

Dura-Hoist Worm Gear Portable Power Winch

Model 477 Power Winches from Thern

  Models

Model Motor Description Motor Load Rating Wire Rope Line Speed Drum Capacity1 Approx Ship Weight
HP 1st Layer Mid Drum Full Drum Diameter 1st Layer Full Drum 1st Layer Mid Drum Full Drum
lb lb lb in fpm fpm ft ft ft lb
47712 115/1/60 VAC – 6 ft pendant 1.2 2000 1500 1200 5/16 13 22 13 40 90 88
4771AC-1PH 115/1/60 VAC – less controls 1.2 2000 1500 1200 5/16 13 22 13 40 90 87
4771AC-1PH23 115/230/1/60 VAC – less controls 1.5 2000 1500 1200 5/16 13 22 13 40 90 115
4771AC-3PH3 230/460/3/60 VAC – less controls 1.5 2000 1500 1200 5/16 13 22 13 40 90 111
4771DC4 12 VDC – 10 ft pendant 1.0 2000 1500 1200 5/16 13 22 13 40 90 105
4771PN4,5 pneumatic – less controls 1.2 2000 1500 1200 5/16 13 22 13 40 90 70
4771HY4,5 hydraulic – less controls 2.3 2000 1500 1200 5/16 13 22 13 40 90 72
47772 115/1/60 VAC – 6 ft pendant 1.2 2000 1500 1200 5/16 13 22 7 27 60 93
4777DC4 12 VDC – 10 ft pendant 1.0 2000 1500 1200 5/16 13 22 7 27 60 105
1 Actual drum capacities may be 25-30% less due to non-uniform winding. Wire rope tension will also affect drum capacity.
2 Motor includes an 8-foot power cord with grounded plug and a push button pendant control on 6-foot cord.
3 For models 4771AC-1PH2 and 4771AC-3PH, please specify voltage when ordering.
4 For pneumatic, hydraulic, and DC models, line speed is based on rated load, actual line speed varies with load weight and power supply.
5 For model 4771PN, ratings are for 80 cfm at 100 psi. For model 4771HY, ratings are for 4 gpm at 1000 psi.

  Features

Anchor your operation with the reliability of DuraHoist. With solid construction, internal lubrication and pendant control, the only thing you won’t need is worry.

  • 115 /1/60 Electric Motor: Standard 115 volt single phase motor includes power cord with grounded plug and a momentary contact-type push button pendant control on a control cord.
  • Cast Aluminum Construction: Rugged work site durability in a lightweight package.
  • Machine Cut Worm Gears: Bronze gearing provides accurate, high efficiency operation and long lasting service.
  • Enclosed Oil Bath: Gears operate with continuous lubrication to minimize wear. Oil seals keep oil in and dirt out.
  • Automatic Brake: Internal mechanical brake provides positive load control for lifting and lowering operations.
  • Bronze Ball Bearings: Bearings are self-aligning and provide smooth and efficient operation.
  • Large Diameter Drums: Minimize wear to extend wire rope life.
  • Narrow Drums: Designed with a 4 inch drum for tight fleet angle installations.
  • Corrosion Resistant: Durable paint finish combined with trivalent zinc plating protects against corrosion in harsh environments.
  • Two-Year Warranty: Industry-leading two-year limited warranty on all our products.

Model Description Approx. Ship Weight (lb)
10L2A16 NEMA 1 control switch – mounted and wired 3
10L2A46 NEMA 4 watertight control switch – mounted and wired 7
477PN-CNTRL pneumatic control valve (not mounted or plumbed, no hoses) 6
477PN-HS6 6 ft hoses for pneumatic controls (not plumbed) 4
477HY-CNTRL hydraulic control valve (not mounted or plumbed, no hoses) 5
477HY-HS6 6 ft hoses for hydraulic controls (not plumbed) 4
6 Controls for 115 volt, single phase, 60 cycle include an 8 ft. power cord with grounded plug.
  • Options
  • Mounting Options: Floor, wall, or ceiling mount configurations available.
  • Emergency Hand Crank: Allows for manual operation in case of power failure. Does not include handle.
  • Rotary Limit Switches: Provides secondary shut-off to limit load travel in one or two directions. Not available on clutch models.
  • Pressure Plate: Applies pressure to drum and wire rope to help maintain uniform winding.
  • Special Motors and Controls: Available in a wide range of standard and custom configurations for single or variable speed, including severe duty and explosion proof. Motors also available in hydraulic and pneumatic.
  • Special Finishes: Available for operation in harsh or hazardous environments.
  • Torque Limiters: Available as part of the motor controls on electric models.

  Dimensions

Dimensions for Series 477 Power Winches from Thern

Model A B C H K L P Q S (Hole Diameter)
4771 14.38 8.86 3.55 17.45 6.75 6.31 5.70 2.16 0.34
4771AC-1PH 14.38 8.86 3.55 22.00 6.75 6.31 5.70 2.16 0.34
4771AC-1PH2 14.38 8.86 3.55 21.00 6.75 6.31 5.70 2.16 0.34
4771AC-3PH 14.38 8.86 3.55 19.00 6.75 6.31 5.70 2.16 0.34
4771DC 14.38 8.86 3.55 18.69 6.75 6.31 5.70 2.16 0.34
4771PN 14.38 8.86 3.55 14.94 6.75 6.31 5.70 2.16 0.34
4771HY 14.38 8.86 3.55 11.84 6.75 6.31 5.70 2.16 0.34
4777 14.38 8.86 3.49 17.45 6.75 6.31 5.70 2.16 0.34
4777DC 14.38 8.86 3.49 18.69 6.75 6.31 5.70 2.16 0.34
Dimensions for Series 477 Power Winches from Thern
Model Extension Drum Diameter Flange Diameter Drum Width Fleet Angle Distance
in in in ft
4771 3.00 6.00 6.00 10
4771AC-1PH 3.00 6.00 6.00 10
4771AC-1PH2 3.00 6.00 6.00 10
4771AC-3PH 3.00 6.00 6.00 10
4771DC 3.00 6.00 6.00 10
4771PN 3.00 6.00 6.00 10
4771HY 3.00 6.00 6.00 10
4777 3.00 6.00 4.00 7
4777DC 3.00 6.00 4.00 7

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