Understanding Eye bolt Materials, Load-Bearing Capacity, and Installation in One Article

Eye bolts

Eye bolts, also known as eye bolts, are bolts with a ring-shaped structure, primarily used to attach heavy objects or as suspension points. They are widely used in various industrial and domestic applications, such as furniture assembly, securing outdoor equipment, and assembling bridges, tower cranes, and hoisting equipment.

Eye bolt Standards

National Standards:

GB/T 825-1988 is a key national standard for eye bolts. It provides detailed specifications for their structure and dimensions, technical requirements, lifting weights, and operating conditions. This standard applies to eye bolts with sizes from M8 to M100×6, used for general loading and unloading applications such as lifting machinery and equipment.

Industry Standards:

JB/T 58651.13-1999 is also a standard for eye bolts. While search results did not yield further information on its scope of application, it serves as a basis for regulating the production and use of eye bolts within the industry.

Key Features of Eye bolts

High Strength:

Eye bolts are usually made of high-quality alloy materials and are heat-treated at high temperatures to ensure their strength and wear resistance.

Precision Manufacturing:

Advanced CNC machine tools are used to strictly control dimensional accuracy, ensuring interchangeability and stability of the eye bolts.

Corrosion Protection:

The surface treatment uses an anti-corrosion process, such as CORRUD-DT surface treatment technology, which is at least 20 times more effective than conventional galvanizing, significantly extending the life of the eye bolt.

Elegant and Beautiful:

The simple and stylish exterior design complements the modern engineering style.

Classification and types of eye bolts

1. Classification by Material

Stainless steel eye bolts: Highly corrosion-resistant, suitable for use in harsh environments, such as chemical and marine environments prone to corrosion.

Cast iron eye bolts: Relatively inexpensive, suitable for general environmental requirements.

Aluminum alloy eye bolts: Lightweight, mostly used in light-load applications.

Steel eye bolts: High strength, capable of bearing heavy weights, suitable for heavy-load applications. Common types include standard Q235 eye bolts, high-strength 45# eye bolts, 40Cr eye bolts, 35CrMoA eye bolts, and Q345D eye bolts.

2. Classification by Shape

Cylindrical eye bolts: Simple structure, suitable for a wide range of applications.

Hexagonal eye bolts: Easy to operate with a wrench, improving work efficiency.

Square eye bolts: Increase connection strength, suitable for special applications.

Flat eye bolts: Space-saving, suitable for use in confined spaces.

3. Classification by Application

Structural Eye bolts: Used for connecting large structures such as buildings and bridges.

Machinery Eye bolts: Used for fastening and connecting components within machinery and equipment.

Decorative Eye bolts: Used for connecting decorative components such as furniture, doors, and windows.

4. Classification by Surface Treatment

Ordinary Eye bolts: Untreated, suitable for general environments.

Rust-Resistant Eye bolts: Surface-treated for rust resistance, suitable for humid environments.

Galvanized Eye bolts: Galvanized for excellent corrosion resistance.

Nickel-Plated Eye bolts: Nickel-plated for both aesthetics and corrosion resistance.

Application areas of eye bolts

Eye bolts are widely used in ports, electric power, steel, shipbuilding, petrochemicals, mining, railways, construction, metallurgy, automobile manufacturing, plastic machinery, industrial control, highways, large-scale transportation, pipeline auxiliary, slope tunnels, shaft management and protection, maritime rescue, marine engineering, airport construction, bridges, aviation, aerospace, venues and other important industries as well as mechanical equipment of infrastructure projects. In addition, they are also widely used in various engineering fields, such as bridges, tower cranes, lifting equipment, etc.

Eye bolt Usage Requirements

Installation Requirements:

Must be installed vertically on a flat workpiece surface, with a flat, tight joint. The eye bolt must be adjusted in the direction of tension, and the screw must avoid contact with sharp edges.

Testing Requirements:

The eye bolt must pass a test load of 2.5 times the working load and undergo 20,000 fatigue cycles at 1.5 times the working load. It must meet or exceed the requirements of ASME B30.26.

Operation Requirements:

Only qualified personnel must operate the eye bolt and refer to the operating instructions. When connected to a sling, the connection between the sling and the eye bolt must remain free to rotate. Regular safety inspections should be performed by qualified personnel.

In summary, eye bolts are high-performance fasteners widely used in various industries due to their high strength, corrosion resistance, and wide range of applications. However, to ensure their safety and effectiveness, users should carefully select the appropriate product and follow correct operating procedures.