Custom Hydraulic Cylinders for Metallurgical & Heavy Machinery

For the hydraulic press industry, Tianjin Uranus Hydraulic Machinery Co., Ltd. is a leading supplier of custom hydraulic cylinders used as main rams, auxiliary cylinders, ejectors, and die cushion cylinders. As a national high-tech enterprise with over 30 years of hydraulic expertise, we design cylinders for presses ranging from 100 tons to 10,000 tons, for applications in metal forming, composite molding, powder compacting, and more. Our custom main cylinders for hydraulic presses are typically large, with bores up to 1,200 mm and strokes up to 3,000 mm. They are designed for high cycle life and must withstand extreme pressures and side loads. We use forged steel for the cylinder body and end caps, and the piston rod is induction-hardened to 60 HRC and hard chrome-plated. The bearing area is optimized using finite element analysis to distribute loads evenly. For a US-based press manufacturer, we supplied a custom main cylinder for a 5,000-ton forging press. The cylinder has a bore of 800 mm, a stroke of 2,500 mm, and operates at 450 bar. It features a multi-layer seal system with a wear ring and a buffer seal, and it has been in service for over 10 years with only one seal replacement. For die cushion cylinders, we provide custom cylinders that apply a controlled counterforce during deep drawing. These cylinders must have very low friction and precise pressure control. We offer cylinders with integrated proportional pressure valves and position sensors. For a German automotive press builder, we supplied custom die cushion cylinders for a transfer press line. The cylinders have a bore of 200 mm, a stroke of 300 mm, and achieve pressure control accuracy of ±1 bar. For ejector cylinders, we provide compact, high-force cylinders that are mounted inside the press bed. These cylinders often have a short stroke but must generate high force. We use high-strength materials and can integrate position feedback for precise ejection. For a Chinese appliance manufacturer, we supplied 50 custom ejector cylinders for a stamping press line. The cylinders have a bore of 100 mm, a stroke of 150 mm, and operate at 250 bar. They have achieved a cycle life of over 5 million cycles. Our design process includes a detailed review of the press structure, mounting interfaces, and cycle requirements. We provide 3D CAD models and technical data sheets to facilitate integration. Each cylinder is tested on a dedicated press simulator to verify performance under load. For a custom cylinder for your press application and a quote, please contact our engineering team.