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Allen Brothers  |  SKU: ALNA20401HL

Allen Brothers 40mm Dynamic Block with Swivel Head High Load

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Sale price $75.80 Regular price $79.52

Pickup available at 1830 East Interstate 30

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DELIVERY AND RETURN INFO

Allen Brothers 40mm Dynamic Block with Swivel Head High Load

40mm Single High Load Swivel Block

The 40mm Single High Load Swivel Block is a high-performance pulley designed for keelboats and dinghies. Manufactured from glass-loaded nylon and featuring Allen's advanced Dynamic Bearing Technology, it delivers smooth, efficient line handling for mainsheets, jib sheets, spinnaker sheets, and control line systems.

Fitted with a stainless-steel high-load sheave, this version offers faster rolling speeds, lower friction, and compatibility with both rope and wire.

Features

  • Single-sheave design for smooth and efficient line handling
  • Manufactured from durable, lightweight glass-loaded nylon
  • High Load Stainless-Steel Sheave for lower friction, faster rolling speeds, and improved durability
  • Suitable for use with both rope and wire
  • Ideal for mainsheet, jib sheet, spinnaker sheet, and keelboat control line applications
  • Patented Dynamic Bearing System with twin rows of stainless-steel ball bearings running on a stainless-steel rail
  • Caged ball bearings for reduced friction and enhanced rolling performance
  • Superior load-carrying capability and long service life
  • 360° Swivel Head fitted with a 4mm shackle for flexible attachment and optimal load alignment
  • Large Central Becket Hole for use as a tie-off point in purchase systems
  • Designed for smooth, reliable performance in demanding marine environments

Technical Description

Accessories Swivel
Bearing Type High Load
Configuration Single
Length 83.38 mm
Maximum Line Diameter 10 mm
Breaking Load 780 kg
Maximum Working Load 360 kg
Pin Size 4 mm
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