Xinda Steel Cable/Rope Universal Double Pulley XD-9789: One Pulley, Two Rope Types, 22kN High Strength

Ideal for Ziplining, Outdoor Traverses, and Aerial Ropeways

I. Product Overview

In rope work, pulleys are essential components for changing direction, hauling loads, and rigging systems. However, traditional pulleys have a common problem: steel cable pulleys and rope pulleys are usually not interchangeable, forcing users to carry different pulleys for different scenarios.

The Xinda XD-9789 double pulley solves this problem. It is compatible with both standard ropes and steel cables, features built-in ball bearings, an automatic spring-loaded gate, and dual stainless steel attachment points — one pulley for ziplining, outdoor traverses, and aerial ropeways.

II. Technical Specifications

Parameter	Value
Product Name	Double Pulley
Brand	Xinda
Item No.	XD-9789
Material	High-strength aluminum + 304 stainless steel
Maximum Breaking Load	22 kN
Working Load Limit	150 kg
Applicable Rope Diameter	≤13 mm
Gate Opening	16 mm
Weight	409 g
Standard	XF 494-2023
Application Scope	Ziplining / Outdoor Traverses / Aerial Ropeways, etc.

III. Key Design Features

3.1 Universal for Steel Cable & Rope

This is the biggest advantage of the XD-9789.

Traditional pulleys are usually designed for either fiber ropes or steel cables — not both. The XD-9789 features a grooved track design that runs smoothly with nylon ropes, static ropes, and steel cables.

For steel cable: Ziplining, aerial ropeways, cargo transport
For rope: Outdoor traverses, rescue hauling, rope protection
One pulley, multiple uses — no need to carry two sets of equipment

3.2 Sealed Ball Bearings – Smooth as Silk

The XD-9789 is equipped with sealed ball bearings:

Reduces rotational friction
Improves mechanical efficiency
Smooth, stable operation without sticking
Extends bearing service life

Whether hauling heavy loads or high-speed sliding, the ball bearings provide a smooth spinning experience.

3.3 Automatic Spring-Loaded Gate – 3-Step Rope Installation

Traditional pulleys require awkward gate opening, alignment, and closing — especially difficult with gloves on.

The XD-9789 features a spring-loaded front gate:

Step	Action
Step 1	Press the spring-loaded gate
Step 2	Insert the rope
Step 3	Release the gate — it snaps back automatically

The gate automatically closes after rope insertion, greatly improving efficiency, especially when wearing gloves or working in complex environments.

3.4 Dual Stainless Steel Attachment Points – Greater Stability

The top of the pulley features two stainless steel attachment points:

Can attach two carabiners simultaneously
Made of high-strength 304 stainless steel — corrosion resistant
Meets the needs of high-altitude work, rescue, and more
Redundant connection points for added safety

3.5 High-Strength Materials – Lightweight & Portable

The XD-9789 is made of 7075 aviation aluminum + 304 stainless steel:

Component	Material	Feature
Pulley body	7075 aluminum	High strength, lightweight
Load-bearing parts	304 stainless steel	Wear-resistant, corrosion-resistant, strong
Attachment points	304 stainless steel	Rust-proof, durable

Total weight is only 409g — lightweight and easy to carry without sacrificing strength and durability.

IV. Technical Parameters Explained

Parameter	Value	Explanation
Maximum Breaking Load	22 kN	Approx. 2.2 tons — ultimate strength
Working Load Limit	150 kg	Safe working limit for daily use
Applicable Rope Diameter	≤13 mm	Compatible with most ropes
Gate Opening	16 mm	Fits various connectors
Weight	409 g	Lightweight and portable
Standard	XF 494-2023	Complies with fire/rescue standards

Safety Note: The working load limit of 150kg is the recommended safe working limit. The maximum breaking load of 22kN is the ultimate test value — do not exceed the working load limit in daily use.

V. Application Scenarios

Scenario	Specific Use	Recommended Rope/Cable
Ziplining	Core pulley for zipline systems	Steel cable
Outdoor Traverse	Redirection pulley for rope traverse systems	Fiber rope
Aerial Ropeway	Pulley for cargo or passenger transport	Steel cable
Rescue Hauling	Directional pulley in mechanical advantage systems	Fiber rope
High-altitude Work	Tool hauling, rope management	Fiber rope
Rope Course Training	Rope classes, team-building activities	Fiber rope

VI. Product Advantages Summary

Advantage	Description
Universal for steel cable & rope	One pulley works with both rope types — no need for multiple sets
Ball bearings	Low friction, high efficiency, smooth operation
Automatic spring-loaded gate	3-step rope installation, self-closing — saves time and effort
Dual stainless steel attachment points	Attach two carabiners — added safety margin
High-strength materials	7075 aluminum + 304 stainless steel — lightweight & durable
22kN high breaking load	Approx. 2.2 tons ultimate strength — ample safety margin

VII. Usage Guidelines

Check rope diameter — Ensure rope/cable diameter does not exceed 13mm before use
Steel cable use — After using steel cable, inspect sheave grooves for unusual wear
Confirm gate is closed — Ensure the spring-loaded gate has fully snapped back after rope installation
Regular inspection — Check bearing rotation for smoothness, check attachment points for deformation
Avoid overloading — Working load limit is 150kg — do not exceed
Cleaning & care — Remove dirt and debris after use; keep bearings clean

VIII. Who Is It For?

Zipline / ropeway operators — Core component of zipline systems
Outdoor adventure parks — Traverse courses, rope programs
Rescue personnel — Pulley components in rope rescue systems
High-altitude workers — Tool hauling, rope redirection
Outdoor enthusiasts — Personal rope system rigging
Industrial rope access technicians — Cargo transport, hoisting operations

IX. Conclusion

The Xinda XD-9789 Steel Cable/Rope Universal Double Pulley truly achieves “one pulley, multiple uses.”

Universal for steel cable & rope → Ziplining, traverses, ropeways — one pulley for all
Ball bearings → Smooth as silk, stable operation
Automatic spring-loaded gate → 3-step rope installation, self-closing
Dual stainless steel attachment points → Two carabiners, safety redundancy
22kN high breaking load → Approx. 2.2 tons ultimate strength
409g lightweight → Easy to carry, not a burden

Whether you operate a zipline course, rig outdoor traverses, or need a pulley compatible with both steel cable and rope, the XD-9789 meets your needs.