Thern
Thern M4312PBSS Hand Winch 2000 lb Spur Gear Brake Stainless Steel
Stainless-steel spur-gear hand winch with brake lifts 2000 lb first layer, holds 110 ft of 3/16 in rope
- 2,000 lb first-layer lifting capacity
- Enclosed stainless-steel gears resist corrosion
- Automatic brake holds the load safely
- 7:1 gear ratio eases heavy pulls
- 110 ft synthetic or wire rope capacity
Capacity and Build
The Thern M4312PBSS is a stainless-steel hand winch rated for 2000 lb on the first layer. It uses a single 14.7:1 spur-gear ratio and an enclosed gear housing for lifting and pulling tasks. The drum holds 110 ft of 3/16 in or 1/4 in rope, 49 ft of 7/32 in rope or 39 ft of 5/16 in rope. Fully wound capacity drops to 1200 lb.
Operation Effort
The spur-gear reduction keeps cranking force manageable for the rated loads. An integrated brake holds the load when the handle is released. No clutch means the drum is always engaged, so free-spooling is not possible. Stainless construction resists corrosion in marine or industrial environments.
Sustained Use
Under continuous cranking the fixed 14.7:1 ratio delivers steady torque without gear changes. The brake engages automatically at each pause, preventing back-drive during long lifts. Drum capacity limits line length to the figures above, so plan pulls around the 110 ft maximum.
Highlights
- 2,000 lb first-layer lifting capacity
- Enclosed stainless-steel gears resist corrosion
- Automatic brake holds the load safely
- 7:1 gear ratio eases heavy pulls
- 110 ft synthetic or wire rope capacity
Specifications
| Brand | THERN |
|---|
Questions about this item
How do I mount the Thern M4312PBSS hand winch and what is the common installation mistake?
Bolt the stainless steel body to a flat surface that can handle 2,000 lb first-layer load; the step people miss is checking drum capacity — 110 ft of 3/16 in rope, 59 ft of 1/4 in, 49 ft of 7/32 in, or 39 ft of 5/16 in — before winding.
What maintenance will the enclosed spur-gear brake winch need over time?
Inspect the brake mechanism and stainless steel gears periodically; re-lubricate the 14.7:1 spur gear set if operation stiffens, and replace synthetic or wire rope once it shows wear or reaches the 110 ft maximum line length.
What limit appears first when pulling continuously at the 2,000 lb rating?
The fully wound load capacity drops to 1,200 lb as rope builds on the drum, so sustained heavy pulls hit that reduced capacity before the brake or gear ratio becomes a factor.
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