Dutton-Lainson B3503 Heavy Duty Brake Winch, 3500Lb

Dutton-Lainson B3503 Heavy Duty Brake Winch, 3500Lb

This Dutton-Lainson® B3503 heavy-duty brake winch is built for controlled horizontal pulling and vertical lifting, using a fully automatic self-locking friction brake that holds your load precisely when you stop cranking—helping prevent runaway loads and making positioning safer and easier. Designed for higher frequency and longer-duration use than Dutton-Lainson’s DLB-series, it pairs rugged steel construction and long-life gearing with a comfortable ergonomic handle for demanding hauling and lift jobs (note: it requires a minimum 500 lb operating load to function properly).

Country of Origin
Made in the U.S.A.

Key Features / Specifications

• Brand/Series: Dutton-Lainson® B-Series self-locking brake winch (Model B3503 / Part 24844)
• Capacity: 3,500 lb
• Application: Horizontal pulling and vertical lifting
• Brake system: Built-in, fully automatic friction brake (self-locking; load stops when cranking stops)
• Minimum operating load: 500 lb (required for proper brake function)
• Handle: 12-1/4" heavy-duty steel handle with ergonomic molded grip (integral to braking mechanism)
• Reel hub diameter: 3-1/8"
• Finish: Powder coated matte black; zinc plated TUFFPLATE® finish on base/hardware
• Gears: Laminated high carbon steel gears for longer life; heat treated gears (DLB800A through B3503)
• Bearings: Permanently lubricated, maintenance-free bearings on drive shafts
• Durability features: Copper-brazed drive shaft gears; rigid welded reel construction; heavy gauge embossed/reinforced steel base
• Install: Slotted mounting holes for easier installation
• Effort: Load-matched gear ratios for easier cranking
• Options/compatibility: Ratcheting handle available when cranking space is limited; can be operated with a large boat lift wheel (sold separately)
• Safety/standard: Meets ASAE Safety Standard S361.3
• Use limitation: Not to be used as hoists for lifting/supporting/transporting people, or for loads over areas where people could be present

Ideal For

• Boat lift and dock lift applications needing positive load-holding control
• Heavy-duty hauling, pulling, and lifting where precise stopping/positioning matters
• Higher-use, longer-duration manual winching compared to light-duty brake winches
• Worksites and outdoor installs where corrosion-resistant plated hardware is beneficial