Harken Apex Limb-O Lok Rigging Block

$525.00

The Apex Limb-O Lok arborist block is engineered for high-load rigging applications with dynamic impact forces, delivering exceptional strength, control, and durability in demanding tree care environments.

Built with a best-in-class strength-to-weight ratio, Limb-O Lok provides enhanced friction, efficient load management, and safe lowering performance—even in aggressive negative rigging scenarios.

In stock
MPN: IN407.LOK

User Manual (PDF)

  • Handles High Impact Loads Designed for rigging scenarios where shock loading and dynamic forces are critical factors.
  • Enhanced Friction for Controlled Lowering Improves load control and reduces unwanted acceleration during lowering operations.
  • Locking Sheave
  • Integrated locking mechanism helps reduce forces in negative rigging, increasing safety and control.
  • Mid-Line Attach Capability Pivoting side plate allows fast, simple installation anywhere along the rope.
  • Compact, High-Strength Design Aluminum construction delivers durability without unnecessary weight.

Technical Specifications

  • Material: Aluminum
  • Color: Red & Grey
  • Dimensions:
    • Length: 174.75 mm (6.88 in)
    • Width: 102.36 mm (4.03 in)
    • Thickness: 69.85 mm (2.75 in)
  • Weight: 3.135 lb (1422 g / 50.1 oz)
  • Working Load Limit (Impact): 35 kN (8,000 lbf)
  • Hauling WLL: 22 kN (5,000 lbf)
  • Minimum Breaking Strength (MBS): 222 kN (50,000 lbf)
  • Carabiner Hole MBS: 25 kN (5,620 lbf)
  • Standards: ASME B30.26-2015 Compliant

Design & Performance Features

  • Robust Opening Block Design Built for quick deployment and efficient rigging setup.
  • Lock Button & Sheave System
  • Provides clear locked/unlocked status and reliable engagement.
  • Wide Rope Compatibility Supports ropes up to 19 mm (3/4") diameter

Safety & Compliance

  • Designed for lowering, raising, and load transfer in arborism
  • Suitable for rope deviation and mechanical advantage systems
  • Requires trained, qualified operators
  • Must be inspected before and after each use

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