Chain sling 80 DOF

2-pointsteel

Product Overview
Grade 80 DOF Chain Sling is a double-leg lifting assembly manufactured from quenched and tempered Grade 80 alloy steel chain and components. The sling is fitted with an oblong master link on the top and two foundry hooks on the bottom, providing a large hook opening for secure two-point lifting. The double-leg design offers improved load stability and balanced force distribution, making it suitable for heavy castings, steel fabrications, machinery handling, and industrial lifting. Each sling is permanently identified with a serial number, chain size, grade, exact sling length, and Working Load Limit to ensure complete product traceability.

Introduction
The foundry hooks feature an extra-wide throat opening for connecting to large lifting lugs, castings, steel fabrications, and oversized components that cannot be accommodated by standard sling hooks. The double-leg configuration distributes lifting forces evenly between two attachment points, improving load stability and handling efficiency while maintaining a 4:1 design factor.

Product Configuration Code

• D = Double Leg
• O = Oblong Master Link
• F = Foundry Hook

Note: DOF therefore refers to a Double Leg Chain Sling fitted with an Oblong Master Link on the top and Two Foundry Hooks on the bottom.

Product Identification

• Individual Serial Number
• Chain Size
• Chain Grade
• Exact Sling Length
• Working Load Limit (WLL)

Standards & Testing

• Manufacturing Standards: Manufactured from quenched and tempered Grade 80 alloy steel chain and components in accordance with EN 818-2, EN 1677-1, EN 1677-2, EN 1677-4, ASME B30.9, OSHA 1910.184, AS 2321, and ISO 3077 requirements for Grade 80 lifting chain sling assemblies.
• Testing Standards: Minimum design factor of 4:1. Each sling is proof tested, visually inspected, dimensionally verified, and checked for component compatibility before shipment. The chain complies with EN 818 fatigue requirements and successfully withstands 20,000 load cycles at 1.5 times the Working Load Limit (WLL). Every sling is supplied with an individual serial number, identification tag, written certification, and complete traceability records.
• Application Standards: Suitable for overhead lifting, two-point lifting, heavy castings, structural steel, machinery installation, foundry operations, mining maintenance, equipment manufacturing, and industrial material handling.
• Maintenance: Inspect before each use for chain elongation, excessive wear, cracks, corrosion, deformation of foundry hooks, damaged master links or connecting links, and missing identification tags. Remove the sling from service immediately if defects exceed applicable inspection criteria.

Parameters (Design Factors & Working Load Examples)
Design Factor | 1-Leg Sling | 2-Leg Sling | 3-Leg & 4-Leg Slings
4:1 | (see load factors below for angles and chain diameters)

Chain Diameter | 90 Degrees (Load Factor: 1) | 60 Degrees (Load Factor: 1.7) | 45 Degrees (Load Factor: 1.4) | 30 Degrees (Load Factor: 1) | 60 Degrees (3-leg/4-leg Load Factor: 2.6) | 45 Degrees (2.1) | 30 Degrees (1.45)
7/32″ | 2,100 | 3,600 | 3,000 | 2,100 | 5,500 | 4,400 | 3,200
9/32″ | 3,500 | 6,100 | 4,900 | 3,500 | 9,100 | 7,400 | 5,200
5/16″ | 4,500 | 7,800 | 6,400 | 4,500 | 11,700 | 9,500 | 6,800
3/8″ | 7,100 | 12,300 | 10,000 | 7,100 | 18,400 | 15,100 | 10,600
1/2″ | 12,000 | 20,800 | 17,000 | 12,000 | 31,200 | 25,500 | 18,000
5/8″ | 18,100 | 31,300 | 25,600 | 18,100 | 47,000 | 38,400 | 27,100
3/4″ | 28,300 | 49,000 | 40,000 | 28,300 | 73,500 | 60,000 | 42,400
7/8″ | 34,200 | 59,200 | 48,400 | 34,200 | 88,900 | 72,500 | 51,300
1″ | 47,700 | 82,600 | 67,400 | 47,700 | 123,900 | 101,200 | 71,500
1-1/4″ | 72,300 | 125,200 | 102,200 | 72,300 | 187,800 | 153,400 | 108,500

Packaging & MOQ
MOQ: 100 Sets
Package: Carton + Steel Pallet

Additional Notes
The serial number on the identification tag corresponds with the written certification and sales order record, ensuring complete product traceability throughout its service life.

Specifications

• Model / Series: DOF
• Chain Grade: Grade 80 alloy steel, quenched and tempered
• Design Factor: 4:1
• Top Fitting: Oblong master link (Grade 80)
• Bottom Fittings: Two foundry hooks (Grade 80) with extra-wide throat openings
• Identification: Individual serial number; chain size; chain grade; exact sling length; Working Load Limit (WLL)
• Manufacturing Standards: EN 818-2; EN 1677-1; EN 1677-2; EN 1677-4; ASME B30.9; OSHA 1910.184; AS 2321; ISO 3077
• Testing: Proof tested; complies with EN 818 fatigue requirements; withstands 20,000 cycles at 1.5×WLL
• Applications: Overhead lifting, two-point lifting, foundry work, heavy castings, structural steel, machinery handling
• MOQ & Packaging: 100 sets; Carton + Steel Pallet