Doughty Quad Sheave Pulley

Doughty Quad Sheave Pulley

Designed for professional rigging applications, the Doughty Quad Sheave Pulley is a modular solution engineered for performance and versatility. Ideal for use in the theatre, film, and TV industries, this pulley system allows for the efficient assembly of quad-sheave configurations using standard components.

Its durable nylon sheaves are compatible with both fiber and wire ropes, offering flexibility across different setups. The Doughty Quad Sheave Pulley is built to accommodate a range of brackets and fixings, ensuring adaptability for various rigging needs.

Each unit provides a consistent safe working load of 331 lbs and is available in three sheave diameter sizes—4'', 6'', and 7''—with a uniform width of 4.6''. This system delivers mechanical advantage in lifting operations while maintaining high safety standards.

Downloads:

User Manual

Key Features:

• Modular quad-sheave pulley system for customizable rigging solutions
• Compatible with fiber or wire ropes for versatile application
• Designed specifically for theatre, film, and television industries
• Standard components allow easy integration with Doughty fixings and brackets
• Safe Working Load (SWL) of 331 lbs across all sizes

Specifications:

• Pulley Type: A Nylon sheave running on a plain shaft without ball raced bearings
• Sheave Dimensions: 4'', 6'' and 7'' Diameter
• Rope/Wire Compatibility: - 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: 4.6'' (uniform across all sizes)
• Safe Working Load (SWL): 331 lbs

References:

• Sheave vs Pulley: A sheave is the grooved wheel inside a pulley used to guide rope or wire
• Mechanical Advantage: Additional sheaves reduce required lifting force but may increase friction
• Manufacturer: Doughty Engineering – UK-based leader in rigging and lifting equipment since 1985

Doughty Engineering is a trusted name in the entertainment equipment industry, known for its commitment to quality and safety. As a member of PLASA and ESTA, Doughty ensures all products meet rigorous industry standards for performance and reliability.