Aluminum Alloy Double-Pulley Chest Ascender

A high-efficiency dual-pulley chest ascender designed for Single Rope Technique (SRT), Rope Access, caving, and firefighting rescue. The body is precision-engineered from 7075 aerospace-grade high-strength aluminum alloy and stainless steel, weighing only about 112g, combining extreme lightweight construction with exceptional durability.

Featuring an innovative integrated dual-pulley rope guide structure, it significantly reduces metal wear during rope entry and exit, making the ascent process extremely smooth and effortless. Equipped with a rope-retention safety closure system, it completely prevents the main rope from accidentally slipping out during lateral movement or swaying in the air; the opening latch is specially designed with a small hole for a cord, allowing for rapid, one-handed operation. The high-strength steel cam features three dedicated self-cleaning mud channels, ensuring reliable rope-grabbing braking power even in harsh conditions such as icy, muddy, or wet environments. The angled lower connection hole allows the chest ascender to sit flush against the chest of the harness, ensuring a straight and efficient vertical ascent path.

Key Features

• Integrated Dual-Pulley Low-Resistance Design: Dual rollers guide the main rope in and out, drastically reducing friction and preventing wear between the rope and the ascender body.

• Rope-Retention Safety Closure: A fully enclosed design eliminates the risk of the rope accidentally disengaging during lateral shifts or significant swaying.

• Quick-Release Cord Hole: The cam lever features a hole for an auxiliary cord, enabling quick, one-handed opening and closing operations.

• Steel Cam with Three Mud-Cleaning Channels: Durable, high-hardness stainless steel cam with three grooves to quickly expel mud and ice, ensuring a secure, non-slip grip.

• Optimized Angled Connection Hole: The bottom hole is geometrically optimized to keep the chest ascender flush against the harness chest bridge, preventing misalignment during ascent.

• Authoritative Firefighting Standards: Complies with the XF494-2023 firefighting fall protection equipment standard, with a 5kN working load for safety and reliability.

Technical Specifications

• Main Material: 7075 Aerospace-grade aluminum alloy, stainless steel (cam and pulleys)

• Compatible Rope Diameter: 8 – 13 mm

• Rated Load: 5 kN

• Net Weight: Approx. 112 g

• Certification: XF494-2023 Firefighting Fall Protection Equipment Standard

• Structural Features: Integrated dual pulleys, three mud-cleaning channels, rope-retention safety lock, auxiliary cord hole

• Applications: SRT ascent, caving, rope access positioning, firefighting rescue, tree climbing (arboriculture)