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Allen Brothers  |  SKU: ALNA20403B

Allen Brothers 40mm Dynamic Triple Block and Becket

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Sale price $150.10 Regular price $157.48

Pickup available at 1830 East Interstate 30

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DELIVERY AND RETURN INFO

Allen Brothers 40mm Dynamic Triple Block and Becket

40mm Triple Dynamic Swivel Block With Becket

The 40mm Triple Dynamic Swivel Block With Becket is a high-performance, triple-sheave 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 becket makes it ideal for creating compact purchase systems for backstay, cunningham, outhaul, and vang controls, while the swivel head ensures optimal alignment under changing load angles.

Features:

  • Triple-sheave design for high-purchase systems and increased mechanical advantage
  • Manufactured from durable, lightweight glass-loaded nylon
  • Ideal for mainsheet, vang, cunningham, backstay, and keelboat control line applications
  • Patented Dynamic Bearing System featuring 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 5mm shackle for flexible attachment and optimal load alignment
  • Shackle is load-rated higher than the block for added reliability
  • Swivel Lock System allows the shackle to be locked in 90° orientations when required
  • Swivel lock can be removed easily by undoing the shackle and removing it from the swivel pin
  • Integrated Becket for creating purchase systems and convenient tie-off points
  • Ideal for backstay, cunningham, outhaul, and vang control systems
  • Low-friction, fast-rolling performance for smooth operation under load
  • Designed for reliable performance in demanding marine environments
  • Perfect for high-load control systems requiring efficient purchase, secure attachment, and precise line control

Technical Description

Accessories Becket, Swivel
Bearing Type Dynamic
Configuration Triple
Length 110.05 mm
Height 109 mm
Width 60 mm
Maximum Line Diameter 10 mm
Breaking Load 1400 kg
Maximum Working Load 750 kg
Sheave Material Acetal
Sheave Diameter 40 mm
Pin Size 5 mm
Weight 163 g
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