WanTong Hydraulics Achieves Technological Breakthrough in Cylinder Technology for Tunnel Excavation and Construction Equipment, Empowering the Localization of Underground Engineering Machinery.

Shandong Wantong Hydraulic Co., Ltd.'s independently developed cylinders for tunnel excavation and construction equipment have become a critical support for breaking through the technological bottleneck in core hydraulic components of domestically produced tunnel engineering machinery, thanks to their ability to withstand complex operating conditions and their high-precision control performance.

This type of cylinder is fully compatible with core equipment such as tunnel boring machines, segment erector machines, and tunnel anchor drilling rigs. It maintains stable output at the rated working pressure even in challenging geological conditions—ranging from soft soil to hard rock—as well as in tunnel environments characterized by high dust levels and elevated humidity. Additionally, it delivers continuous, trouble-free operation for over 40% longer than conventional products, effectively filling a critical technology gap in China’s high-end tunnel engineering equipment sector. According to Wontong Hydraulic’s financial report for the first half of 2025, revenue from its tunnel excavation and construction equipment cylinder segment surged by 65% year-on-year, significantly boosting the company’s overall gross margin for mechanical equipment cylinders, which remained steady at 26.8%. This segment has become a key driver of the company’s revenue growth. Addressing the core challenges faced during tunnel excavation and construction—such as heavy-load impacts, multi-medium corrosion, and stringent precision requirements for coordinated equipment operations—Wontong Hydraulic has developed a specialized technical system centered around "high-pressure resistance, anti-pollution capabilities, and precise synchronization." In terms of materials, these cylinders feature a robust cylinder body crafted from high-strength alloy forgings, undergoing multiple stages of tempering and heat treatment to achieve a base material tensile strength exceeding 1,250 MPa. Complemented by a nano-ceramic composite coating applied to the piston rod surface, the wear resistance is improved by 50% compared to traditional chrome-plating processes, ensuring long-term, high-intensity performance under diverse tunnel geological conditions.

As major underground infrastructure projects—such as urban rail transit, cross-river and cross-sea tunnels, and underground utility tunnels—are advanced under the "14th Five-Year Plan for the Development of a Modern Comprehensive Transportation System," the domestic market demand for tunneling and construction equipment continues to surge, directly boosting the procurement needs for core hydraulic components.

Industry data shows that WanTong Hydraulics has now increased its market share in China’s oil cylinder segment for medium- and large-scale tunneling equipment to 32%, doubling from 2023 levels, making it a key domestic supplier of hydraulic cylinders for tunneling machinery. Meanwhile, the company’s core technologies—such as high-pressure load-bearing capabilities and multi-cylinder collaborative control—developed through its R&D efforts in tunnel equipment cylinders, are gradually being integrated into other product lines, including intelligent oil-gas suspension systems and hydraulic components for underground engineering robots. This cross-functional technology synergy is helping to create a comprehensive "Tunnel Engineering Cylinders + Underground Intelligent Equipment Hydraulic Solutions" product portfolio, providing end-to-end support for the green and intelligent upgrading of tunneling equipment.

As a leading domestic manufacturer of hydraulic components, Wantong Hydraulics is leveraging its technological breakthroughs in cylinders for tunneling and construction equipment to drive the transformation of China’s core tunnel engineering equipment—from reliance on imports toward self-reliance and full control. With accelerating technology upgrades and expanding market share, Wantong Hydraulics’ advanced cylinders are not only providing critical support for enhancing the performance of domestically produced tunneling equipment but have also become a powerful symbol of China’s manufacturing industry as it transitions from "following" to "running alongside" global leaders in the high-end underground engineering hydraulics sector.