Aluminum Alloy Heart-Shaped Double Pulley Series

A professional series of heart-shaped tandem pulleys designed for Adventure Parks, forest high ropes courses, zip lines, and rope rescue traverses. The pulleys feature high-wear-resistant stainless steel sheaves that are compatible with both high-strength nylon ropes and rigid steel cables, offering exceptional abrasion resistance. Equipped with precision-sealed ball bearings, they provide smooth, low-friction gliding with a mechanical efficiency of over 90%. The attachment holes are specially enlarged with chamfered edges, allowing various auto-locking carabiners and their sleeves to pass through directly, making the setup of lanyards and backup fall arrest systems extremely convenient.

Key Features

• Universal Stainless Steel Sheaves for Steel Cable / Fiber Rope: High-hardness stainless steel pulleys are durable, wear-resistant, and resistant to cutting and scarring, making them fully compatible with both metal cables and fiber ropes ≤13mm.

• Precision-Sealed Ball Bearings: Featuring high rotational speed and low friction, these bearings offer a mechanical transmission efficiency of ≥90%, ensuring stable and quiet performance on long-span zip lines and horizontal traverses.

• Unobstructed Carabiner Passage: Enlarged holes allow large three-stage auto-locking gates and sleeves to pass through directly, eliminating the need for tedious unhooking and ensuring smooth transitions.

• Heart-Shaped Anti-Tilt Geometry: The dual-sheave tandem design accurately locks onto the track, preventing tilting or jamming during movement and providing excellent balance.

• Dual Safety Attachment Layout: Provides a main travel attachment point and a backup fall arrest eyelet, complying with redundancy protection standards for outdoor high-altitude rope activities.

Explanation of the Two Hole Configurations

• 【Tri-Eye Heart-Shaped Tandem Pulley (4-Hole / Professional Flagship Model)】

  • Equipped with 4 attachment holes for high versatility. Features 2 enlarged main carabiner holes in the center (allowing auto-locking sleeves to pass through smoothly), with additional auxiliary positioning holes at the top and bottom for convenient simultaneous connection of main lanyards, backup tow lines, and braking systems.

  • Strength: Breaking Strength 36kN | Weight: Approx. 313g | Sheave Diameter: 27mm

• 【Heart-Shaped Tandem Pulley (Classic Two-Hole Model - Black / Silver)】

  • Classic heart-shaped design with upper and lower dual holes. The top hole is 18mm for positioning, and the bottom hole is an enlarged 20mm (supporting auto-locking gate passage). Weighing only about 266g, it is exceptionally compact and agile.

  • Strength: Working Load 22kN | Weight: Approx. 266g | Sheave Diameter: 26mm

Specifications

• Main Material: 7075 Aerospace-grade Aluminum Alloy (side plates), Stainless Steel (sheaves, axle)

• Applicable Media: Metal cables, fiber ropes (rope diameter ≤ 13mm)

• Bearing Type: Sealed Ball Bearing

• Mechanical Efficiency: ≥ 90%

• Testing Standard: XF494-2023