477 Dura-Hoist Helical/Worm Gear — Model 4771 Dura Hoist Portable Power Winch.
Up to 2,000 lb Capacity
Anchor your operation with the reliability of Dura-Hoist. With solid construction, internal lubrication and pendant control, the only thing you won’t need is worry.
Quick Facts
Series Models
| Series | Imperial | ||||
| Load Rating | Power Supply | Line Speed | Drum Capacity | Drum (Wide or Narrow) | |
| 4771 | 2,000 lbs lst layer | 115/1/60 VAC | 13-22 fpm | 90-120 ft | Wide |
| 4771PN | 1,500 lbs lst layer | Pneumatic | 13-22 fpm | 90-120 ft | Wide |
| 4771HY | 2,000 lbs lst layer | Hydraulic | 13-22 fpm | 90-120 ft | Wide |
| 4771DC | 2,000 lbs lst layer | 12 VDC | 13-22 fpm | 90-120 ft | Wide |
| 4777 | 2,000 lbs lst layer | 115/1I60 VAC | 13-22 fpm | 60-89 ft | Narrow |
| Series | Metric | ||||
| Load Rating | Power Supply | Line Speed | Drum Capacity | Drum (Wide or Narrow) | |
| 4771 | 907 kg lst layer | 115/1/60 VAC | 13-22 fpm | 90-120 ft | Wide |
| 4771PN | 680 kg lst layer | Pneumatic | 13-22 fpm | 90-120 ft | Wide |
| 4771HY | 907 kg lst layer | Hydraulic | 13-22 fpm | 90-120 ft | Wide |
| 4771DC | 907 kg lst layer | 12 VDC | 13-22 fpm | 90-120 ft | Wide |
| 4777 | 907 kg lst layer | 115/1I60 VAC | 13-22 fpm | 60-89 ft | Narrow |
Series 477 Configurations and Performance Characteristics
| Model Number | Motor Description | Motor HP | Load Rating | Wire Rope Dia.1 | Line Speed | Drum Capacity 2 | Approx. Ship Weight | |||||
| 1st Layer | Mid Drum | Full Drum | 1st Layer | Full Drum | 1st Layer | Mid Drum | Full Drum | |||||
| (lb) | (lb) | (lb) | (in) | (fpm) | (fpm) | (ft) | (ft) | (ft) | (lb) | |||
| 4771 2 | 115/1/60 VAC- 6 ft pendant | 1.3 | 2,000 | 1,500 | 1,200 | 5/16 | 13 | 22 | 13 | 40 | 90 | 88 |
| 4771AC-1PH | 115/1/60 VAC- less controls | 1.3 | 2,000 | 1,500 | 1,200 | 5/16 | 13 | 22 | 13 | 40 | 90 | 87 |
| 4771AC-1PH23 | 115/230/1/60 VAC-less controls | 1.5 | 2,000 | 1,500 | 1,200 | 5/16 | 13 | 22 | 13 | 40 | 90 | 115 |
| 4771AC-3PH3 | 230/460/3/60 VAC-less controls | 1.5 | 2,000 | 1,500 | 1,200 | 5/16 | 13 | 22 | 13 | 40 | 90 | 111 |
| 4771DC4 | 12 VDC- 10 ft pendant | 1.0 | 2,000 | 1,500 | 1,200 | 5/16 | 13 | 22 | 13 | 40 | 90 | 105 |
| 4771PN4,5 | Pneumatic- less controls | 1.2 | 2,000 | 1,500 | 1,200 | 5/16 | 13 | 22 | 13 | 40 | 90 | 70 |
| 4771HY4,5 | Hydraulic- less controls | 2.3 | 2,000 | 1,500 | 1,200 | 5/16 | 13 | 22 | 13 | 40 | 90 | 72 |
| 47772 | 115/1/60 VAC- 6 ft pendant | 1.3 | 2,000 | 1,500 | 1,200 | 5/16 | 13 | 22 | 7 | 27 | 60 | 93 |
| 4777DC4,6 | 12 VDC- 10 ft pendant | 1.0 | 2,000 | 1,500 | 1,200 | 5/16 | 13 | 22 | 7 | 27 | 60 | 105 |
Please contact Thern or nearest Thern Distributor for firm, fixed price and delivery.
1Actual drum capacities may be 25-30% less due to nonuniform winding. Tension in wire rope will also affect drum capacity.
2 Motor includes an 8-ft power cord with grounded plug and a push button pendant control on 6-ft cord.
3 For models 4771AC-1PH2 and 4471AC-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.
6controls are separate.
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.
Enclosed Oil Bath
Gears operate with continuous lubrication to minimize wear. Oil seals keep oil in and dirt out.
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.
WARNING: Prop 65: Products supplied by CERTEX USA may expose you to chemicals including Nickel, which is known to the State of California to cause cancer. For more information, visit to www.P65Warnings.ca.gov.
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