Custom Hydraulic Cylinders for Metallurgical & Heavy Machinery

For the construction and mining equipment industry, Tianjin Uranus Hydraulic Machinery Co., Ltd. manufactures custom hydraulic cylinders that deliver high power density, exceptional durability, and ease of service. As a national high-tech enterprise with over 30 years of hydraulic experience, we design cylinders for excavators, wheel loaders, bulldozers, haul trucks, and drilling rigs. These cylinders must withstand extreme shock loads, abrasive dust, and wide temperature variations while maintaining reliable performance in remote locations with limited maintenance facilities. Our custom cylinders for earthmoving equipment feature heavy-wall seamless tubing, forged end caps, and induction-hardened, chrome-plated rods with hardness of 55-60 HRC. The rod surface is polished to a mirror finish to extend seal life. We use high-load-capacity bearings made from bronze or advanced polymer composites, and our seal systems include multiple components: a primary rod seal, a buffer seal, a wiper, and a backup ring. For a leading Chinese excavator manufacturer, we developed a custom boom cylinder with a built-in counterbalance valve and a cushioning feature at the end of the stroke. This cylinder has been tested to over 1 million cycles under full load and is now used in their largest excavator model. In the mining sector, we supply custom cylinders for haul truck dump bodies and steering systems. These cylinders are extremely large, with bores up to 300 mm and strokes up to 2.5 meters. They are designed with replaceable wear strips and cartridge-type seals to simplify field repairs. For a copper mine in Chile, we provided a set of steering cylinders for a 400-ton haul truck, featuring integrated position sensors and heavy-duty wipers to keep out dust. The cylinders operate at ambient temperatures ranging from -10°C to 45°C and have achieved a mean time between failures of over 50,000 hours. For drilling rigs, our custom cylinders are used for mast raising/lowering, top drive positioning, and pipe handling. These applications require precise control and high reliability. We offer cylinders with integrated load-holding valves and optional emergency lowering functions. Our design process includes finite element analysis to optimize weight-to-strength ratio, and we use advanced welding techniques such as friction welding for rod ends and robotic MIG welding for mounting brackets. All cylinders are pressure tested and cycle tested before shipment. We provide comprehensive documentation including operating manuals, parts lists, and maintenance guidelines. Our after-sales support includes spare parts availability through our global network and technical assistance by phone or video. For a custom cylinder for your construction or mining application and a detailed quote, please contact our engineering team.