Custom Hydraulic Cylinders for Metallurgical & Heavy Machinery

Tianjin Uranus Hydraulic Machinery Co., Ltd. provides custom hydraulic cylinders for the mining and tunneling industry, including roof supports, roadheaders, tunnel boring machines (TBMs), and rock drills. As a national small giant enterprise with over 30 years of experience, we design cylinders that withstand extremely high shock loads, abrasive dust, and corrosive mine water. Our custom cylinders for roof supports in underground coal mines are typically double-acting, with large bores (up to 200 mm) and strokes (up to 1,500 mm). They must provide high load capacity and have a compact design to fit in limited space. We use high-strength steel with a corrosion-resistant coating, and we incorporate integrated pilot-operated check valves to maintain support pressure. For a Chinese mining equipment manufacturer, we supplied custom roof support cylinders for a longwall mining system. The cylinders have been in operation for over 5 years with a failure rate of less than 0.1 percent. For tunnel boring machines, our custom cylinders are used for thrust, steering, and segment erector systems. These cylinders must operate at very high pressures (up to 400 bar) and have long strokes (up to 2,500 mm). We use forged components, heavy-duty bearings, and dual seal systems with external flushing ports to keep out dirt. For a German TBM manufacturer, we supplied custom thrust cylinders for a 10-meter diameter tunnel boring machine. The cylinders have a bore of 320 mm and a stroke of 2,000 mm, and they are designed for 15,000 hours of continuous operation. For roadheaders, we provide custom cylinders for boom lift and swing, as well as conveyor lift. These cylinders must be highly durable and able to absorb vibration. We use induction-hardened rods and bronze bearings, with a heavy-duty wiper and scraper to remove rock dust. For a European roadheader manufacturer, we supplied custom boom cylinders that have achieved a mean time between failures of over 20,000 hours in hard rock mining. Our manufacturing process for mining cylinders includes 100 percent non-destructive testing of all critical welds, pressure testing, and load cycling tests. We provide a comprehensive documentation package, including material certifications, test reports, and a maintenance manual. For a custom cylinder for your mining or tunneling application and a quote, please contact us.