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
- 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




