Leaf Chain BL622 BL623 BL634 BL644 BL646 BL666 BL688 for Forklift Truck Lifter

▍What is a Leaf Chain (Hoisting Chain)?

A leaf chain (Hoisting Chain) is a type of chain constructed from steel link plates and pins, which are joined together to form a continuous loop. It is commonly used in material handling applications such as forklifts and straddle carriers due to its durability and high tensile strength. Leaf chain (Hoisting Chain) is designed to cope with heavy loads and is often used in the automotive, food and beverage, mining and metals, and construction industries. Leaf chains (Hoisting Chains) are typically more expensive than other chains due to their higher tensile strength and durability.

▍BL Leaf Chain Size Chart

▍Types of Leaf Chain

BL Series Leaf Chain(LH Leaf Chain)

BL leaf chains consist of link plates thicker and larger in contour than the AL series link plates of the same pitch. The link plates have the same thickness as the next larger pitch size in ANSI roller chains. The pins have the same diameter as those of ANSI roller chains of the next larger pitch.

AL Series Leaf Chain(American Standards)

Plate configuration and thickness are the same as the ANSI roller chain. The pin diameter is almost the same as the ANSI roller chain. AL leaf chain (manufactured to the ANSI B29.9 standard) is constructed from American standard roller chain components. AL series leaf chain is a lightweight chain used for light-load lifting applications and machine tools.

LL Series Leaf Chain(European Standards)

LL leaf chain, manufactured according to ISO4347, DIN8152, and NFE26107 standards, is constructed from roller chain components to European standards. Like the AL leaf chain, the LL leaf chain is a lightweight chain used for light-load lifting applications and machine tools.

▍The Structure of the Leaf Chain (Hoisting Chain)

A leaf chain (Hoisting Chain) is composed of two parts, a chain plate, and a pin shaft. The chain plates are connected by the pin shaft to withstand the tension of the chain plate. The outer chain plate and the pin shaft have an interference fit, and the inner chain plate and the pin shaft have a sliding fit. Compared with roller chains, leaf chains have a greater strength/weight ratio.

1. Outer chain plate

The outer chain plate of the leaf chain is made of special steel, which can resist sudden load and provide maximum resistance to fracture.

2. Bearing pin

The load-bearing pin of the leaf chain has strong bending resistance, excellent wear performance, and long life.

3. Inner chain plate

Through the precise control of the pin shaft and the aperture of the chain plate, the movement of the inner chain plate is improved, friction is minimized, and the economy and efficiency of chain operation are improved.

▍Applications of Leaf Chain (Hoisting Chain)

As a common transmission and lifting device, a leaf chain (hoisting chain) is generally used in drives with large power and slow speed, and it is also suitable for corrosion-resistant, clean, or demanding chemical fields and high and low-temperature environments.

Leaf chains (hoisting chains) are widely used in the lifting equipment industry, construction machinery industry, bulk material industry, etc. Specific applications include forklifts, stackers, parking garages, ascending platforms, etc.

▍Leaf Chain Manufacturing Process

The basic technological process of leaf chain manufacturing includes raw material preparation, parts processing (chain plates, pins), rolling processing, parts heat treatment, surface treatment, parts oiling, assembly, and other steps.

1. Selected high-quality raw materials

Leaf chain carefully selects high-performance raw materials, including high-quality carbon structural steel, alloy structural steel, and spring steel, and strictly controls the raw materials.

2. Rigorous and comprehensive raw material testing

It has advanced and complete testing laboratories at each of our factories, which conducts scientific and rigorous comprehensive testing of each raw material to ensure that they meet the quality and safety requirements.

3. High-quality and efficient parts processing

The parts are processed by high-precision high-speed punches, high-speed cutting equipment, etc.

4. Heat treatment of parts

The fully automated mesh belt furnace line, rotary furnaces, converter, and other equipment are used to process the leaf chain parts to improve the strength and toughness of the leaf chain.

5. Assembly

The leaf chain goes through automated assembly and testing production lines to accurately and efficiently assemble the finished leaf chain.

6. Finished product inspection

Before leaving the factory, the leaf chain needs to complete a series of inspections and tests, including chain performance tests such as tension, wear, and fatigue.

▍Leaf Chain Manufacturers & Suppliers

You'll find the right product whether you need a leaf chain for forklifts, machine tools, rolling door counterbalances, or any other application. We vet all leaf chain suppliers and products for the highest-quality, most durable leaf chains. All of our leaf chains are heavy-duty with tensile strengths that vary from thousands to tens of thousands of pounds. Our store features two types of leaf chains, the AL-Series for lighter lifting, and the BL Series for more heavy-duty work. Additionally, our leaf chains meet both ANSI and ASME standards.

Edited by Yjx