Doughty Double Sheave Pulley

Doughty Double Sheave Pulley

The Doughty Double Sheave Pulley is a modular, high-performance pulley system engineered for use in the theatre, film, and television industries. Built for versatility, this pulley can be easily assembled using a limited range of standard components and adapted with a variety of brackets and fixings to suit specialized rigging needs.

Designed to support either fiber or wire ropes, the system is both durable and safe, offering a consistent safe working load (SWL) of 331 lbs across all sizes. With sheaves available in 4'', 6'', and 7'' diameters, it is suitable for a wide range of lifting and suspension applications.

Each double-sheave configuration enables increased mechanical advantage, reducing the force required to lift heavy loads. This makes it an essential tool for professionals demanding efficient and safe load management in dynamic environments.

Downloads:

User Manual

Key Features:

• Modular construction allows for easy assembly and customization
• Compatible with both fiber and wire ropes for broad application use
• Three sheave sizes available: 4'', 6'', and 7'' diameter
• Rated safe working load (SWL) of 331 lbs across all pulley sizes
• Designed specifically for theatre, film, and TV industry rigging solutions

Specifications:

• Sheave Dimensions: 4'', 6'', and 7'' Diameter
• Sheave Material: Nylon
• Recommended Rope/Wire Sizes:
  - 4'' Sheave: 0.5'' Rope OR 0.16'' Wire
  - 6'' Sheave: 0.7'' Rope OR 0.24'' Wire
  - 7'' Sheave: 0.7'' Rope OR 0.24'' Wire
• Width: 2.1'' (same for all sizes)
• Safe Working Load (SWL): 331 lbs (same for all sizes)

References:

• Pulleys vs. Sheaves: Understanding the components of pulley systems
• Double-Sheave vs. Multi-Sheave: Balancing mechanical advantage and friction
• Manufacturer: Doughty Engineering – a PLASA and ESTA member since 1985

Optimize your rigging setup with the Doughty Double Sheave Pulley—trusted in venues worldwide for precision, reliability, and safety in lifting operations.