B Series Precision Roller Chains Manufacturers

Double-strand Roller Chains improve power transmission efficiency and reduce energy consumption

In modern industrial and agricultural machinery, maximizing power transmission efficiency while minimizing energy consumption is a critical goal for enhancing productivity, reducing operational costs, and supporting sustainability. Among the key components enabling this optimization are double-strand roller chains—engineered solutions that deliver higher load capacity, improved stability, and smoother operation compared to their single-strand counterparts. Hangzhou Qianjiang Chain Industries Co., Ltd., a leading Chinese manufacturer with a legacy of excellence since 1987, has been at the forefront of developing and producing high-performance double-strand roller chains that meet the evolving demands of energy-efficient machinery across diverse sectors.

Founded in 1987, Hangzhou Qianjiang Chain Industries Co., Ltd. specializes in a comprehensive range of chain products, including A.B series precision roller chains (available in single, double, and multi-strand configurations), motorcycle special chains, high-end oil-sealed chains, logistics transportation machinery chains, dustproof and waterproof industrial oil-sealed chains, agricultural machinery chains, lifting machine chains, silent tooth transmission chains, stepless transmission chains, intelligent door and window bending chains, stainless steel chains, non-standard special chains, and precision-machined sprockets. Within this extensive portfolio, the company’s B Series Precision Roller Chains stand out for their robust design, superior load distribution, and contribution to energy-saving mechanical systems.

Double-strand roller chains consist of two parallel rows of standard roller chain links connected by common pins, effectively doubling the load-bearing capacity without significantly increasing the chain’s width or complexity. This configuration provides greater tensile strength and enhanced resistance to shock loads, making them ideal for medium- to heavy-duty applications such as conveyor systems in mining and logistics, agricultural harvesters and balers, industrial mixers, packaging machinery, and material handling equipment. Crucially, by distributing power transmission across two strands, these chains reduce stress on individual components, minimize elongation, and maintain consistent alignment with sprockets—factors that directly contribute to smoother operation and lower energy loss due to friction and vibration.

Hangzhou Qianjiang’s double-strand roller chains—particularly those in the A.B series—are manufactured to stringent international standards (including ISO 606 and ANSI B29.1), ensuring dimensional precision, uniform hardness, and high fatigue resistance. The company employs advanced heat treatment, precision assembly, and shot peening techniques to enhance the durability and performance of each chain. Additionally, optional oil-sealed or pre-lubricated versions are available for harsh environments, where dust, moisture, or high temperatures could otherwise accelerate wear. These sealed designs retain internal lubrication and block contaminants, further reducing friction and extending service life—key factors in maintaining long-term energy efficiency.

A cornerstone of Qianjiang’s technological edge is its longstanding collaboration with academic and research institutions. Since 1991, the company has partnered with the Chain Transmission Research Institute of Jilin University of Technology (now part of Jilin University) and the China Chain Research Institute. This production-learning-research alliance has driven continuous innovation in chain design and materials science. While joint efforts have led to breakthroughs in specialized products like the PIV stepless transmission chain and CL series silent tooth chain, the knowledge gained has also been applied to foundational components—including double-strand roller chains. For example, optimized pin-bushing clearance and improved roller roundness derived from this research have significantly reduced internal friction, resulting in quieter, cooler-running chains that consume less energy during operation.

Moreover, Hangzhou Qianjiang recognizes that efficiency gains often come from customization. The company offers both standard and non-standard double-strand chains tailored to specific customer requirements—whether it’s a unique pitch, special attachments for conveying, corrosion-resistant stainless steel construction, or integration with custom sprocket profiles. This flexibility allows OEMs to design machinery that operates at peak efficiency from the ground up, without compromising on reliability or serviceability.

The energy-saving benefits of high-quality double-strand roller chains extend beyond the chain itself. By ensuring stable, low-vibration power transmission, they reduce stress on motors, gearboxes, and bearings, leading to lower overall system energy consumption and extended equipment lifespan. In large-scale operations—such as automated warehouses or continuous agricultural processing lines—even a 2–3% improvement in transmission efficiency can translate into substantial cost savings and reduced carbon emissions over time.

Quality control is rigorously enforced throughout Qianjiang’s manufacturing process. Every double-strand chain undergoes tensile testing, elongation checks, hardness verification, and visual inspection to guarantee consistent performance. This commitment to excellence has enabled the company to serve a global clientele seeking durable, efficient, and competitively priced transmission solutions.

In conclusion, double-strand roller chains are far more than just heavy-duty alternatives—they are intelligent engineering choices that enhance power transmission efficiency and support sustainable operations. Hangzhou Qianjiang Chain Industries Co., Ltd. combines nearly four decades of manufacturing expertise, cutting-edge research collaboration, and a customer-focused approach to deliver double-strand roller chains that not only meet but exceed industry expectations. By integrating Qianjiang’s high-performance chains into their machinery, businesses invest in smoother operation, reduced energy consumption, and long-term operational resilience—proving that efficiency and durability can go hand in hand.