Our Heavy-Duty Leaf Chains are engineered for vertical lifting applications where high tensile strength, fatigue resistance, and dependable load handling are essential.
Designed for warehouse sky stackers, automated storage and retrieval systems (AS/RS), vertical lifting equipment, stacker cranes, and industrial material handling machinery, these leaf chains provide a robust load-bearing connection for repeated lifting and lowering cycles.
Unlike roller chains primarily designed for continuous power transmission, leaf chains are optimized for lifting and pulling applications. Their plate-and-pin construction provides a high-strength, compact solution for equipment requiring controlled vertical movement and reliable load support.
Heavy-duty leaf chains are manufactured from high-strength steel plates and precision-engineered pins to withstand substantial tensile loads in lifting applications.
The leaf chain structure is optimized for vertical lifting, counterbalance, pulling, and load-positioning systems rather than conventional sprocket-driven power transmission.
Repeated lifting cycles place continuous stress on chain components. Controlled heat treatment and precision manufacturing help improve resistance to fatigue under cyclic loading.
The simple plate-and-pin configuration provides a high strength-to-size ratio, making leaf chains suitable for equipment where installation space is limited.
Precision-manufactured chain components help maintain consistent articulation and controlled movement during repeated lifting and lowering operations.
Leaf chains can be integrated into warehouse stackers, vertical lifting systems, automated storage equipment, and other material-handling machinery.
Chain size, plate configuration, pin dimensions, length, material, heat treatment, and packaging can be manufactured according to equipment specifications.
| Specification | Typical Configuration |
|---|---|
| Product Type | Heavy-Duty Leaf Chain |
| Application | Lifting / Pulling / Material Handling |
| Chain Structure | Steel Plates + Pins |
| Material | Carbon Steel / Alloy Steel |
| Material Grade | According to load and application requirements |
| Heat Treatment | Quenching & Tempering / Customized |
| Plate Configuration | According to chain series |
| Pin Material | Hardened Alloy Steel / Customized |
| Pitch | According to chain size |
| Plate Thickness | According to chain specification |
| Plate Width | According to chain specification |
| Pin Diameter | According to chain specification |
| Chain Length | Customized |
| Breaking Load | According to chain size and material |
| Working Load | Application-dependent |
| Safety Factor | According to lifting equipment requirements |
| Surface Treatment | Oil Protection / Coating / Customized |
| Lubrication | Factory Lubricated / Customer Specified |
| Operating Environment | Indoor / Warehouse / Industrial |
| Operating Temperature | Application-dependent |
| Manufacturing Standard | ANSI / ISO / DIN / Customer Specification |
| Inspection | Dimensional / Tensile / Hardness / Assembly |
| Production | Standard / OEM / Custom |
| Packaging | Coil / Carton / Wooden Case / Customized |
Important: Actual working load, breaking load, allowable lifting capacity, fatigue life, and safety factor must be determined from the specific chain model and the complete lifting-system design. Leaf chains should not be selected based on breaking load alone.
A leaf chain consists primarily of interleaved steel plates and hardened pins.
This straightforward construction is particularly effective for applications requiring high tensile strength and repeated articulation.
Multiple steel plates form the main load-bearing structure of the chain. The plate configuration can be selected according to the required tensile capacity and installation dimensions.
Precision-manufactured pins connect the plates and provide the articulation points between adjacent chain sections.
Accurately manufactured pin holes help maintain consistent chain geometry and reduce uneven loading during operation.
Appropriate lubrication reduces friction between pins and plates and helps control wear during repeated lifting cycles.
Modern warehouses increasingly use vertical storage equipment to maximize available floor space.
Sky stackers and automated warehouse lifting systems require chains capable of handling repeated vertical movement while maintaining stable positioning and predictable mechanical performance.
Heavy-duty leaf chains can be used in:
Warehouse sky stackers
Stacker cranes
Automated storage and retrieval systems
Vertical lift modules
Automated lifting platforms
Goods lift mechanisms
Pallet lifting systems
Storage rack lifting equipment
Material positioning systems
Industrial vertical conveyors
The chain specification should be matched to the actual lifting load, lift height, lifting speed, duty cycle, pulley arrangement, and safety requirements.
Leaf chains can be incorporated into vertical movement systems used for automated storage, retrieval, pallet handling, and warehouse organization.
Heavy-duty chains provide the tensile connection required for controlled vertical movement in stacker crane lifting mechanisms.
Suitable for equipment that repeatedly raises and lowers loads within a defined operating path.
Applications include pallet transfer, industrial lifting platforms, goods handling systems, and automated material positioning equipment.
Leaf chains can also be used for counterweight systems, mechanical lifting mechanisms, and specialized pulling applications.
Leaf chain selection requires more than simply matching the chain to the nominal load.
The chain should be selected according to the actual working load and applicable design factor.
Acceleration, deceleration, starting and stopping cycles can generate loads significantly higher than the static suspended weight.
Lifting speed influences articulation, wear, vibration, and overall chain service requirements.
Frequent lifting and lowering creates cyclic stress. High-cycle applications require careful consideration of fatigue performance.
The chain routing system affects chain loading, articulation, bending behavior, and installation requirements.
The complete lifting system should comply with applicable machinery and lifting-equipment safety requirements. Chain selection should be verified as part of the complete engineered system.
Quality-controlled manufacturing is essential for lifting chains because dimensional variation can influence load distribution and fatigue behavior.
Typical manufacturing stages include:
Steel Material Selection → Plate Forming → Precision Hole Processing → Pin Manufacturing → Heat Treatment → Surface Protection → Chain Assembly → Dimensional Inspection → Tensile Testing → Final Inspection
Chain plates are formed and processed to controlled dimensions to maintain consistent geometry throughout the chain.
Pins can be heat treated to achieve the required combination of hardness, wear resistance, and mechanical strength.
Heat treatment parameters are controlled according to the selected steel grade and performance requirements.
Plates and pins are assembled using controlled processes to maintain consistent pitch and articulation.
Finished chains are inspected for dimensional accuracy, mechanical properties, appearance, and assembly quality.
| Inspection Item | Typical Method |
|---|---|
| Chain Pitch | Precision dimensional measurement |
| Plate Thickness | Micrometer / Gauge |
| Plate Width | Dimensional inspection |
| Pin Diameter | Precision measurement |
| Pin Hole Diameter | Gauge inspection |
| Chain Length | Length measurement |
| Breaking Load | Tensile testing |
| Plate Hardness | Hardness testing |
| Pin Hardness | Hardness testing |
| Material Composition | Material certificate / composition analysis |
| Heat Treatment | Hardness / process verification |
| Surface Condition | Visual inspection |
| Lubrication | Assembly inspection |
| Chain Articulation | Functional inspection |
| Assembly Quality | Visual and dimensional inspection |
For OEM lifting applications, inspection documentation can be supplied according to customer quality requirements.
For an accurate chain recommendation, the following information should be considered:
| Parameter | Required Information |
|---|---|
| Lifting Load | Maximum working load |
| Chain Arrangement | Single / Multiple Chain |
| Lift Height | Maximum vertical travel |
| Lifting Speed | Normal operating speed |
| Acceleration | Start / stop characteristics |
| Duty Cycle | Lifts per hour / operating hours |
| Chain Length | Required installed length |
| Pulley Diameter | Minimum bending diameter |
| Operating Environment | Indoor / Dusty / Humid / Temperature |
| Installation Space | Available chain dimensions |
| Safety Requirement | Required design factor |
| Equipment Type | Sky Stacker / ASRS / Vertical Lift / Other |
Providing these parameters allows the chain size and configuration to be evaluated more accurately.
| Feature | Leaf Chain | Roller Chain |
|---|---|---|
| Primary Function | Lifting & Pulling | Power Transmission |
| Main Construction | Plates + Pins | Plates + Bushings + Rollers |
| Load Direction | Mainly Tensile | Power Transmission / Tensile |
| Typical Application | Lifting Systems | Drives & Conveyors |
| Compact Load Capacity | High | Application-dependent |
| Sprocket Drive | Usually Not Required | Commonly Used |
| Warehouse Lifting | Highly Suitable | Application-dependent |
| Stacker Equipment | Suitable | Less common for direct lifting |
| Maintenance | Lubrication & Inspection | Lubrication & Inspection |
The correct chain type depends on the mechanical function of the equipment. Leaf chain should be selected for applications requiring engineered tensile lifting performance, while roller chain is generally intended for sprocket-driven power transmission.
Although warehouse sky stackers are generally installed indoors, operating environments can still expose chains to humidity, dust, cleaning agents, and industrial contaminants.
Depending on the application, leaf chains can be supplied with:
Protective oil coating
Anti-corrosion treatment
Zinc-based surface protection
Customized coating systems
Stainless steel options for specialized environments
For standard indoor warehouse applications, proper lubrication and environmental control are often more important than selecting an excessively heavy surface-treatment system.
Proper maintenance helps control chain elongation, wear, and fatigue during repeated lifting operations.
Recommended practices include:
Inspect the chain regularly for visible damage.
Check plates for cracks, deformation, or abnormal wear.
Inspect pins for wear and surface damage.
Monitor chain elongation.
Maintain appropriate lubrication.
Inspect chain routing and pulley contact.
Check for abnormal vibration or noise.
Avoid sudden overloads.
Replace chains according to established maintenance criteria.
Record inspection results for critical lifting equipment.
For safety-critical lifting applications, maintenance and replacement criteria should be established according to the equipment manufacturer's instructions and applicable regulations.
We provide custom leaf chain solutions for warehouse automation companies, lifting equipment manufacturers, material handling system integrators, and industrial machinery manufacturers.
Chain size
Pitch
Plate configuration
Plate thickness
Pin diameter
Chain length
Material grade
Heat treatment
Surface protection
Lubrication specification
Special dimensions
OEM markings
Packaging and labeling
Production can be based on technical drawings, existing chain samples, equipment specifications, or required load characteristics.
Designed around tensile loading and repeated lifting cycles rather than conventional power transmission.
Precision steel plates and pins provide a robust load-bearing structure.
Designed for vertical movement systems, stacker cranes, and material-handling equipment.
Controlled dimensions and heat-treatment processes support predictable chain performance.
Chain dimensions, materials, heat treatment, and surface protection can be adapted to specific equipment requirements.
Dimensional, tensile, hardness, and material inspection documentation can be provided for qualified OEM projects.
Our Heavy-Duty Leaf Chains provide a compact and robust solution for vertical lifting and pulling applications in automated warehouses and industrial material-handling systems.
From warehouse sky stackers and stacker cranes to vertical lifting platforms and automated storage equipment, our leaf chains can be engineered according to load, speed, duty cycle, installation dimensions, and environmental requirements.
For a technical recommendation, provide your lifting load, chain arrangement, lift height, lifting speed, duty cycle, pulley diameter, and chain dimensions.
Contact us for leaf chain specifications, OEM customization, samples, and technical quotations.
| CHAIN NO. | Pitch | Plate lacing | Plate depth | Plate thickness | Pin diameter | Pin length | Ultimate tensile strength | Average tensile strength | Weight per meter |
| Cadena No | Paso | Combinacion placa | Altura placas | Ancho placas | Diámetro pasador | Longitud pasador | Resis. rotura | Resis. media tracción | Peso por metro |
| P | h2 max | T max | d2 max | L max | Q | Q | q | ||
| mm | mm | mm | mm | mm | KN/LB | KN | kg/m | ||
| BL1266(DG) | 38.10 | 6x6 | 35.7 | 5.6 | 12.70 | 79.3 | 453.7/103113 | 543.6 | 15.1 |
| BL1644(DG) | 50.80 | 4x4 | 48.2 | 7.2 | 17.46 | 65.1 | 573.8/131431 | 680.4 | 17.8 |
| BL1646(DG) | 4x6 | 79.7 | 578.3/131431 | 680.4 | 22.2 | ||||
| BL1666(DG) | 6x6 | 94.2 | 857.4/194863 | 1000.7 | 26.6 | ||||
| BL2088F2(DG) | 63.50 | 8x8 | 58.2 | 9.7 | 23.80 | 169.5 | 1734.8/390257 | 2000.0 | 41.8 |
| LL3244F2(DG) | 50.80 | 4x4 | 43.1 | 6.0 | 17.76 | 54.0 | 520.0/116978 | 600.0 | 12.6 |
| LL3288F4(DG) | 50.80 | 8x8 | 42.0 | 6.4 | 17.81 | 110.5 | 1040.0/233956 | 1200.0 | 25.9 |
| LL4066(DG) | 63.50 | 6x6 | 52.7 | 8.0 | 22.89 | 106.5 | 1080.0/242954 | 1245.0 | 30.0 |
| LL4088(DG) | 63.50 | 8x8 | 52.7 | 8.0 | 22.89 | 140.0 | 1400.0/314940 | 1610.0 | 41.3 |
