Heavy Duty Chain

Wolff Chain Drive: Your Professional Heavy Duty Chain Manufacturer!

Qingdao Wolff Chain Drive Co.Ltd. is located in the industrial zone of the city, covering an area of about 10,000 square meters. Our factory has multiple workshops, which are used for different production links and product manufacturing. We continue to innovate, develop new products, meet all customer requirements, and have stable delivery times.

Our Advantages

Rich Experience & Production Market

Our company has a production history of more than 30 years, and our products have won unanimous praise from customers. Wolff chains are popular in Domestic and foreign markets such as the United States, South America, Europe, the Middle East, Southeast Asia and Africa markets.

Quality Control

Our products are produced and inspected strictly in accordance with GB, AISI, ASTM, API, JIS, BS so as to control and safeguard the quality of products. We adopt strict testing standards and processes to ensure that our products meet international standards and customer requirements. We have a professional quality inspection team to conduct comprehensive inspection and testing of each production batch.

Advanced Equipment

Our factory is equipped with advanced production equipment and technology, including automated production lines, CNC machine tools, laser cutting machines, etc. These equipment can efficiently complete the manufacturing and processing of products and improve production efficiency.

High Quality Product

All our products fully comply with international standards such as ISO\DIN\ANSI\BS\JIS. Wolff has successfully passed ISO9001 quality management system, SGS inspection and BV inspection certification.

Single Strand Heavy Chains
Single Strand Heavy Chains is a chain with a special design. This usually used in high-load and high-speed transmission systems, such as industrial machinery, metallurgical equipment, and...
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Double Strand Heavy Chains
Double Strand Heavy Chains is a chain structure with two layers of rollers, each of which is connected by a roller chain plate. The main features are strong carrying capacity, high transmission...
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Triple Strand Heavy Chains
Triple Strand Heavy Chain is a chain linked by three rows of rollers. It has high load-bearing capacity and transmission efficiency. Weighted roller chains are often used in heavy-duty and...
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Introduction to Heavy Duty Chain

Heavy duty chains are robust and durable chains designed to handle high loads and demanding operating conditions. They are commonly used in various industrial applications that require reliable power transmission and the ability to withstand heavy loads, shock, and vibration. Heavy duty chain has thicker side plates, which not only drastically increases the strength and fatigue resistance of a roller chain but also reduces stretching and wear over time.

Components of Heavy Duty Chain

Roller Chain Bushing
As the internal plates of the heavy duty roller chain are held together by bushings, they perform a crucial role. There is lesser damage on the sprocket teeth and the plates in locations where they contact the pins because the pins holding the outer plates are passed through bushings supporting the inner plates.
There are two types of bushing configurations: solid and divided. Bushings lengthen the life of the chain and enhance performance by reducing stress on the inner link plates and pins. They are made of high-strength, low-friction components. The chain must be installed and maintained correctly, and you must choose the appropriate bushing for the application to provide the longest possible service life.

Roller Chain Pins
Pins are a crucial part of the heavy duty roller chain. The chain’s edginess is due to the Pins. They join the roller chain’s links and distribute the load over the entire chain. Because these surfaces are more susceptible to deterioration, the pins and bushing should be given the most attention when lubricating chains.
Pins and bushing give the entire assembly corrosion resistance and strength. Pins can be thermal, case-hardened, or thru-hardened, depending on the quality.

Roller Chain Roller
The link can turn freely per its gears due to the roller. For instance, unrestricted turning permits less friction during the rolling encounter when the rolling chain is connected to a toothed wheel, such as a sprocket.

Roller Chain Side Plates
Side plates are utilized to reinforce and secure the internal parts. To allow the inner and outer links to transmit the tensile load from pin to pin, the side plates largely handle the tension throughout the chain links.

Roller Chain Connecting Links
To join two straight links together, employ roller chain connecting links. Connecting links are flat with the chain’s outside surface and feature a connector at either end.

Types of Heavy Duty Chain

H Series

H Series chain differs from the ANSI G8 Series chain in the thickness of the link plates. The link plates have the same thickness as the link plates of the next larger pitch size in ANSI G8 Series. The increased thickness of the link plates provides a 9% greater capacity for fatigue strength.
Compared to to the previous series, the wear life of the H Series is doubled by using solid bushes instead of curled bushes.
In short, H Series chains are especially suitable for situations where the load is heavy and operating speed is low (up to 50 m/min) or where operating conditions are severe.

HT Series

HT Series chain provides a significantly higher Tensile Strength (up to 19%) than ANSI G8 Series chain by applying through-hardened pins and link plates of the next larger pitch size in ANSI G8 series.
Compared to the previous series, the wear life of the HT Series is doubled by using solid bushes instead of curled bushes.
HT Series chain also provides a higher fatigue strength and is best suited for low operating speeds (up to 50 m/min). Dimensions of the chain are identical to the H Series chain.

SUPER Series

The dimensions of these series are identical to those of ANSI G8 Series chain. The special design of the SUPER Series link plate delivers exceptional performance. The Lube Groove Bushes ensure longer and better lubrication which results in an extended chain life. The pin holes are critically formed and ball drifted, while the pins are through-hardened for greater fatigue strength.
Super Series chains offer 9% higher tensile strength than the equivalent size ANSI G8 Series chain. Super Series chains can be used to replace the next larger pitch size of ANSI G8 Series, making them ideal for applications where chain space is limited. Best suited for low speed operating conditions (up to 50 m/min).

SUPER-H Series

The thickness of the SUPER-H Series link plates is the same as the next larger pitch size of SUPER Series chain. The pins are also through-hardened which provides a higher tensile strength and a higher fatigue strength than SUPER Series chain. The pin holes of the outer link plates are critically formed and ball drifted. The holes of the roller link plates are ring coined to increase fatigue strength.
SUPER-H Series chains can be used to replace the next larger size of ANSI standard chain, making them ideal for applications where space is limited. Best suited for low speed operating conditions (up to 50 m/min).

Advantages of Heavy Duty Chain

Load Capacity

Heavy duty roller chains are engineered to carry and transport exceptionally heavy loads. They have significantly higher load-carrying capacities compared to standard roller chains, allowing them to handle massive items or bulk materials with ease.

Robust Construction

Heavy duty roller chains feature a robust design to ensure maximum durability and longevity. They have larger pins, thicker plates, and reinforced link connections to withstand heavy impacts, shocks, and bending moments.

Precision Engineering

Heavy duty chains are manufactured with precise engineering techniques to ensure optimal performance under heavy load conditions. Close tolerances, accurate pitch control, and precise roller alignment help minimize wear, reduce friction, and enhance overall efficiency.

High-Strength Materials

Heavy duty chains are typically constructed from premium-grade alloy steels or stainless steels to provide exceptional strength and resistance to wear and corrosion. The materials used are selected for their ability to withstand the extreme forces and stresses associated with heavy loads.

Wide Range of Configurations

Heavy duty roller chains come in various configurations to suit different applications and industries. This includes variations in chain pitch, roller types, plate thickness, and attachment options. Customization options are available to meet specific load requirements and operational conditions.

Suitable for Harsh Environments

Heavy duty roller chains are designed to perform in harsh operating environments. They can withstand extreme temperatures, exposure to chemicals, moisture, abrasive particles, and other challenging conditions commonly encountered in heavy industries like mining, steel mills, construction, and heavy manufacturing.

Application of Heavy Duty Chain

Mining Industry
Heavy duty chains includes Shuttle Car Chain, Feeder Breaker Chain, as well as various chains widely used in drill rigs, rotary breakers, reclaimers, face/roof drilling, continuous miners, prep plants, roof support machines, and continuous haulage systems. They use alloy-grade steels, heat-treated to precise specifications and assembled with the heavy press-fits required to withstand the punishment of today’s more powerful, high production mining equipment.

Sugar Mills
In sugar refining industry, heavy duty chain is mainly adopted as transmission chain. Heavy duty chain has to be abrasion and corrosion resistant since it is inevitably exposed to strong impacts and corrosive environments. The most common sugar mill chain are chains for sugar machines like bush chains, straight panel chains, cranked link chains, cast chains, cast steel chains, and sugar cane collecting chains, sugar cane conveying chains, bagasse conveying chains, etc.

Lumber Industry
In the lumber industry, where processing logs into lumber involves handling substantial and heavy loads, the demands are rigorous. Maintaining optimal uptime is crucial to keeping your lumber mill operating at maximum capacity and ensuring continuous profitability. Heavy duty chains combine high strength, durability and fatigue resistance to suit the demanding applications. In addition, prior to delivery, the lumber transfer chains are coated with a layer of anti-rust oil film which ensures long lasting lubrication and wear reduction.

FAQ

Q: What is H series roller chain?

A: “H”Series chains are dimensionally identical to ANSI standard chains except that the sideplates are thicker. The heavier side plates provide some additional fatigue resistance. They are primarily intended for applications where occasional shock loads are likely to cause fatigue failures in the chain. Whilst there is an increase in tensile strength, the wear life of the case hardened pins remains the same as for standard chain.
Simplex"H” series chains operate on standard ANSI sprockets. Multiple strand "H" chain require non-standard ANSI sprockets because of the thicker side plates.

Q: Why is sprocket alignment important to heavy duty chain?

A: Minimizing Wear and Tear: When sprockets are correctly aligned, the load is evenly distributed across the chain and all the sprocket teeth. This equal distribution prevents excessive wear on one side of the chain or on certain teeth of the sprocket, thereby extending the life of both the chain and sprockets.
Reducing Energy Loss: Misalignment can result in increased friction as the chain engages with the sprocket teeth, leading to energy loss. This energy loss not only reduces the overall efficiency of the mechanical system but also puts additional stress on the chain, hastening its wear and reducing its lifespan.
Preventing Chain De-tracking and Slippage: Properly aligned sprockets ensure that the chain remains on track during its operation. Misalignment can cause the chain to derail or slip off the sprocket, leading to operational interruptions and potential damage to the chain, sprocket, or even the entire mechanical system.
Reducing Noise and Vibration: A well-aligned sprocket-chain interaction facilitates smooth operation, minimizing noise and vibration. These factors can contribute to operator comfort and machine health.

Q: What is heavy duty roller chain?

A: Heavy duty roller chains are designed with thicker side plates compared to standard ANSI B298.1 chains to withstand challenging environments. These chains offer enhanced shock resistance, while the thicker inner and outer link plates minimize wear, reduce stretching, and improve fatigue resistance, ensuring durability and reliability in demanding applications.

Q: What are the benefits of heavy duty roller chains?

A: High efficiency
Heavy duty roller chains can transmit power with minimal energy loss, making them highly efficient.
Versatility
Heavy duty roller chains are available in a wide range of sizes and configurations, making them suitable for a variety of applications.
Durability
Heavy duty roller chains are made from high-quality materials and are designed to withstand heavy loads and harsh environments.
Cost-effectiveness
Heavy duty roller chains are generally less expensive than other power transmission systems, making them a cost-effective solution for many applications.

Q: What are the applications of heavy duty chains?

A: Conveyor Systems
Heavy duty chains are commonly used in conveyor systems for transporting materials from one point to another. They are used in applications such as manufacturing, packaging, and warehousing.
Agricultural Equipment
Heavy duty chains are used in agricultural equipment such as combine harvesters, tractors, and other farm machinery. They are used to transmit power and motion from the engine to the wheels or other components.
Printing Presses
Heavy duty chains are used in printing presses to transport paper and other materials through the machine.
Mining Equipment
Heavy duty chains are used in mining equipment such as conveyors, draglines, and excavators. They are used to transmit power and motion from the engine to the wheels or other components.

Q: What are the features of single strand heavy chains?

A: The rollers of the Single Strand Heavy Chains are heavier than those of a regular chain, which allows the chain to withstand greater loads and torques. The rollers are usually made of high-strength alloy steel and are specially treated and optimized to ensure the normal operation of the chain under high loads and speeds.
The chain plates and pins of the Single Strand Heavy Chains are also specially treated to improve the chain's wear resistance and tensile resistance. The chain plates are usually made of high-strength alloy steel materials, and the pins are made of high-hardness and optimized-design materials to ensure the stability and reliability of the chain during use.
In general, the single-row weighted roller chain is a chain specially designed to carry heavy loads and high-speed transmission systems. It has excellent wear resistance and load-bearing capacity and is suitable for applications in various industrial fields.

Q: What is double strand heavy chain?

A: Double strand heavy chain is a chain structure with two layers of rollers, each of which is connected by a roller chain plate. The main features are strong carrying capacity, high transmission efficiency and long service life. In industrial production, it is usually used in heavy-duty, medium-range, and high-speed transmission systems.

Q: What are the characteristics of your triple strand heavy chain?

A: Triple strand heavy chain is a 3 row roller chain commonly referred to as triplex roller chain. Our triple roller chains are made to exceed the ANSI B29.1 industry standards for roller chain. They are manufactured from high quality materials and is improved by precision heat treatment and shop peening. Their main characteristics are:
Meets and exceeds ANSI B29.1 Standards.
Roller chain components are shot peened for greater fatigue resistance.
Heat treated components for increased durability, longevity and wear resistance.
Chain is pre-loaded (Pre-stretched) to eliminate initial stretching.
Chain components are lubricated before assembly, then dipped in a hot oil bath after assembly.
Riveted Construction.

Q: What is the typical efficiency of a heavy duty roller chain?

A: Tests have shown chain to have an efficiency of between 98.4 and 98.9 percent. This high level of efficiency, achieved by a standard stock chain drive under the correct conditions of lubrication and installation, is equaled only by gears of the highest standard, with teeth ground to very close tolerances.

Q: What materials are used for heavy duty chains?

A: Heavy duty chains are usually made from plain carbon steel or from steel alloys. These kinds of materials are always durable, strong and adaptable, which give heavy duty chains good properties.

Q: What sets super heavy roller chains apart?

A: Advanced lubrication with double the time in a hot oil bath to greatly increase chain life.
Up to 50% higher pin tensile strength and loading capacity.
Designed for durability with wide waist link plates and solid bushings and rollers.
Quad-staked pins for increased holding power on the side plates, making the chain better suited to shock loading.

Q: What is SH series roller chain?

A: SH series roller chains have a greater ultimate tensile strength (about an additional 25%-35%)over ANSI standard roller chains by using through hardened pins,these chains also provide a greater shock load resistance. The dimensions of the chain are identical to ANSI heavy series standard roller chains.

Q: What are the characteristics of heavy leaf chain?

A: Heavy leaf chains are designed to handle heavy loads. Compared to precision roller chains, leaf chains have higher strength ratings, and are suitable for use in high load and high impact environments.
Widely used for lifting and hoisting purposes, leaf chains are often seen on equipment such as forklifts, boom trucks, inter-modal container lifts, cargo lifts and elevators.
The composition of Iris leaf chains is simple. The chains are composed of stacks of link plates and pins. The outer links are press-fitted to the pins. Pins are riveted to secure the press fit and lock the parts in position to prevent the pins from rotating.

Q: What type of leaf chain is best for heavy duty lifting?

A: BL Series ( Leaf Heavy) leaf chains. These leaf chains consist of link plates which are thicker and larger in contour than the AL Series link plates of the same pitch. The link plates have the same thickness as the link plates of 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.

As one of the leading heavy duty chain manufacturers and suppliers in China, we warmly welcome you to wholesale cheap heavy duty chain from our factory. All customized products are with high quality and low price. Contact us for quotation.

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