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Allen Brothers  |  SKU: ALNA20401-77

Allen Brothers 40mm Dynamic Block with Swivel and A..77 Cleat

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Sale price $117.90 Regular price $123.72

Pickup available at 1830 East Interstate 30

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DELIVERY AND RETURN INFO

Allen Brothers 40mm Dynamic Block with Swivel and A..77 Cleat

40mm Single Dynamic Block With A..77 Cleat

The 40mm Single Dynamic Block With A..77 Cleat is a high-performance pulley designed for keelboats and dinghies. Manufactured from durable, lightweight 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.

The integrated ball bearing cam cleat (A..77) is mounted on an adjustable stainless-steel arm, allowing the cleat angle to be tailored to suit the application.

Features:

  • Single-sheave design for smooth and efficient line handling
  • Manufactured from durable, lightweight glass-loaded nylon
  • 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
  • A.77 Ball Bearing Cam Cleat mounted on an adjustable stainless-steel arm
  • Cleat angle can be easily adjusted to suit different installations and line lead angles
  • Designed for smooth, reliable performance in demanding marine environments
  • Ideal for applications requiring both efficient line control and secure cleating in a compact package

Technical Description

Accessories Cleat, Swivel
Bearing Type Dynamic
Configuration Single
Length 83.38 mm
Height 82 mm
Maximum Line Diameter 6 mm
Breaking Load 750 kg
Maximum Working Load 80 kg
Sheave Material Acetal
Sheave Diameter 40 mm
Pin Size 4 mm
Width 48 mm
Weight 118 g
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