Forged Alloy Steel Bow Shackle Galvanized Bolt Type with Nut for Mining & Heavy Industry Lifting

Forged Alloy Steel Bow Shackle Galvanized Bolt Type with Nut – For Mining, Heavy Industry Lifting & Webnet

1. Product Description

The Forged Alloy Steel Bow Shackle Galvanized Bolt Type with Nut is a heavy‑duty lifting and rigging component engineered for mining, heavy industry, construction hoisting, and webnet (safety net) tensioning. Manufactured from high‑strength alloy steel via drop forging and protected with a hot‑dip galvanized finish, this bow shackle delivers exceptional strength, impact resistance, and corrosion protection in harsh industrial and outdoor environments.

The shackle features a bolt type pin secured with a nut (and optional cotter pin) for positive locking, preventing accidental loosening under severe vibration and dynamic loads. The bow (anchor) shape provides a wide radius that accepts multiple sling legs, large chain links, or rope eyes without pinching. It is 100% load tested and available in imperial sizes from 3/16″ to 1″, with breaking loads ranging from 1,500 kg to 28,000 kg. Fully customizable in size, length, width, packaging, logo, and surface finish. Free samples are available, with door‑to‑door service supported.

Ideal for mining equipment lifting, heavy machinery rigging, construction hoisting, and webnet tensioning systems (rockfall barriers, animal enclosures, facade safety nets), this forged alloy steel bow shackle combines strength, safety, and long‑term durability.

2.Product Attributes

Additional Specifications:

• Material: Forged alloy steel (high strength, heat treated). Custom materials on request.

• Surface finish: Hot‑dip galvanized (zinc coating) – anti‑rust, durable.

• Pin type: Bolt type with nut (cotter pin optional for extra security).

• Working load limit (WLL): Typically 1/4 to 1/5 of breaking load (safety factor 4:1 or 5:1). Example: 3/8″ shackle (4,800 kg BL) → WLL approx. 960–1,200 kg.

• Design standard: Oversize anchor shackle, meets international lifting standards (EN 13889, ASME B30.26).

• Customization: Size, length, width, packaging, logo, surface finish, material (min order 500 pieces for certain options).

• Applications: Mining, heavy industry, automotive, food & beverage, healthcare, oil & gas, webnet systems.

3. Key Features

• Forged alloy steel construction – High tensile strength, impact resistance, and fatigue life for demanding mining and heavy‑duty lifting.

• Hot‑dip galvanized finish – Superior rust and corrosion protection for outdoor, wet, and industrial environments.

• Bow (anchor) shape – Wide radius accepts multiple sling legs, large shackles, or chain links without pinching. Distributes load evenly, reducing stress concentration.

• Bolt type pin with nut – Positive locking mechanism prevents accidental loosening under vibration, shock loads, and dynamic lifting. Optional cotter pin for double security.

• High breaking load – Sizes from 3/16″ to 1″ with breaking loads from 1,500 kg to 28,000 kg, suitable for light to extremely heavy lifting.

• 100% load tested – Each shackle is proof‑tested to its rated breaking load, ensuring safety and reliability.

• Fully customizable – Size, length, width, packaging, logo, and surface finish can be tailored.

• Free samples & door‑to‑door service – Low MOQ for trials; convenient global logistics.

• Wide applications – Mining, heavy industry, construction hoisting, webnet tensioning, machinery fixing, and towing.

4. Applications

The Forged Alloy Steel Bow Shackle is used in numerous demanding fields:

• Mining – Conveyor belt splicing, bucket rigging, dragline attachments, safety line anchors, ore car couplings.

• Heavy industry – Overhead crane lifting, steel mill slings, heavy equipment maintenance, industrial hoisting.

• Construction & hoisting – Steel beam lifting, concrete panel rigging, scaffolding ties, crane sling attachments.

• Webnet (safety net) systems – Tensioning and connecting galvanized steel wire rope nets (webnets) for rockfall protection, animal enclosures (zoos, aviaries), building facade safety nets, sports barriers, and fall arrest systems.

• Truck lashing & cargo securement – Flatbed tie‑downs, container lockdown, heavy cargo binding.

• Marine & offshore – Mooring lines, anchor chains, towing bridles (when corrosion protection is adequate).

• General engineering – Machinery fixing, towing, agricultural equipment, and stage rigging.

5. Technical Principles

5.1 Material & Forging

High‑strength alloy steel (e.g., 20Mn2, 35CrMo or similar) is drop forged to refine the grain structure, eliminate internal voids, and maximize strength and fatigue resistance. The bow geometry distributes tensile forces uniformly along the curved body, minimizing stress risers at the pin holes.

5.2 Safety Factor

These shackles are designed with a typical safety factor of 4:1 or 5:1 (breaking load / working load limit). For example, a shackle with a breaking load of 16,000 kg (3/4″) has a safe working load of 3,200–4,000 kg. Users must never exceed the WLL and must account for dynamic loads, angle of pull, and wear.

5.3 Hot‑Dip Galvanizing

The zinc coating (typically 40‑80 µm thick) provides cathodic protection. Even if the coating is scratched, the zinc corrodes preferentially, protecting the steel base. This makes the shackle suitable for long‑term outdoor exposure, wet mining environments, and humid construction sites.

5.4 Bolt Type Pin with Nut

The bolt type pin is inserted through the shackle ears and the attached component, then secured with a nut. For severe vibration applications, a cotter pin can be added through a hole in the bolt end. This design prevents the pin from loosening or backing out, making it ideal for dynamic lifting, rotating loads, and heavy machinery connections.

5.5 Load Testing & Traceability

Each shackle is proof‑loaded to 100% of its rated breaking load. Permanent markings (size, grade, and sometimes load rating) are stamped on the body for traceability and compliance with international standards (e.g., EN 13889, ASME B30.26).

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