20MM DYNAMIC BLOCK, SINGLE BLOCK

The Allen A2020 Dynamic Single Block is a compact, lightweight 20 mm dynamic bearing single block designed for high-performance dinghy and small keelboat applications. Part of Allen’s renowned Dynamic Block range, the A2020 features a low-friction ball bearing system that delivers exceptionally smooth operation for frequently adjusted control lines.

Constructed from high-strength composite materials with stainless-steel bearing races and fittings, the A2020 offers an excellent strength-to-weight ratio while providing reliable performance in demanding marine environments. Its compact size makes it ideal for applications where low weight, minimal friction, and fast line movement are essential.

Technical Specifications

• Model: Allen A2020
• Product Type: Dynamic bearing single block
• Sheave Diameter: 20 mm
• Maximum Line Diameter: 6 mm
• Bearing Type: Dynamic stainless-steel ball bearing
• Number of Sheaves: Single
• Safe Working Load (SWL): 175 kg
• Breaking Load: 500 kg
• Length: 37 mm
• Weight: 11 g
• Construction: Glass-fibre reinforced composite cheeks with stainless-steel bearing races and fittings
• Attachment Type: Fixed eye
• Corrosion Resistance: Marine-grade materials throughout

Features

• Low-friction dynamic ball bearing system
• Lightweight, compact design
• Glass-fibre reinforced composite construction
• Stainless-steel bearing races for long service life
• Smooth operation under both light and moderate loads
• Corrosion-resistant marine-grade materials
• Excellent strength-to-weight ratio
• Ideal for frequently adjusted control lines

Typical Applications

• Cunningham systems
• Outhaul controls
• Vang / kicker systems
• Barber haulers
• Traveller controls
• Jib and spinnaker control lines
• General dinghy and small keelboat rigging