Wuxi YUTONG

  As the main component of the hydraulic cylinder, the processing quality of the   cylinder barrel  directly affects the life and reliability of the entire product. The cylinder has high processing requirements, and its inner surface roughness is required to be Ra0.4 ~ 0.8um, and the requirements for coaxiality and wear resistance are strict. Generally, it is processed and produced by the principle of  honing  or rolling. The common materials of cylinder barrel are SAE1020, 1026, 1045,  ST52 seamless honed tubes , the steel tube is honed or rolled to meet the roughness requirement within 0.4μm. The low-pressure oil cylinder can use 1020 steel pipe, and the high-pressure oil cylinder can use CK45 steel pipe. As a professional cylinder barrel supplier, manufacturer,exporter in China,  Wuxi YUTONG  has more than 20 years production experience, we sell hydraulic honed tubing to customers and provide full range of technical support. Imperial sizes...

  Induction hardening  involves passing a high-frequency alternating current through a suitably-shaped coil to induce rapid heating of the component surface situated appropriately within its electro-magnetic field. Depth of hardening is controlled by the parameters of the induction heating equipment, time of application and the hardenability of the material. A variety of manipulation procedures can be employed to suit the geometry of the component including ‘single-shot hardening’ in which the entire area to be hardened is heated in one operation then quenched, and ‘progressive hardening’ which involves relative movement between the heating coil, quench head and the workpiece.  WHAT ARE THE BENEFITS OF INDUCTION HARDENING? Induction hardening imparts a hard, wear-resistant surface to the component whilst improving its fatigue strength through the development of residual surface compressive stresses in suitably deep cases. Only the surface is heated and  quenched , th...

  Skiving and roller burnishing   process provide high quality  hydraulic cylinders  with final sizing and creates the desired finish pattern on the interior of tubing or cylinder bores. They are used in the manufacturing of hydraulic cylinders. Compared to  honing  process, they are 80-90% saving of machine time which reduces tool costs per meter of tube length and produces super finish surface, with a bore tolerance of H8, thereby reduces the sealing wear making it ideal for pistons. It is capable of holding bore diameter tolerances to 0.025 mm (0.001 in.) The necessary equipment requires a large up-front investment, which makes it suitable for high-volume tubing production. The skiving and roller-burnishing operation, as the name implies, actually involves two processes in one tool. The tube is end clamped in the machine and the tool advances inside. Coolant is pumped through the ID of the tube, flows around the tool and pushes chips out of the front of ...

  Hard chrome plating   also sometimes called chromium plating, is an electroplating process in which a layer of chromium is deposited onto a surface. This layer of chromium protects and extends the life of the part by improving wear resistance, reducing the coefficient of friction, and increasing mild corrosion resistance. These coatings can be applied in a wide range of thicknesses from as low as 0.0002” to 0.020” or more. Hard chrome is widely used in many applications spanning across every industry such as aerospace and agriculture equipment parts. Some common applications include  hydraulic cylinder rods ,valves, crankshafts,  induction hardened piston rods , bailing hooks, harvester rolls, actuator housings, injection molds, dies,  rod cylinders  and rollers. FEATURES & BENEFITS OF HARD CHROME PLATING Increased hardness of HRC 65-70 Excellent sliding wear resistance Great abrasion resistance Low coefficient of friction Excellent release ...

   ST37.4 Cold Drawn Hydraulic Tube   is made in accordance to DIN 2391 / DIN 2445. It also called as seamless precision steel tube. ST37.4 steel tubes have a NBK finishing, where tubes are normalized, phospated, and oiled inside and outside.    ST37.4 Hydraulic steel tubes are measured by Outer Diameter (OD) and varies tube thickness (THK). Difference of OD and tube thickness will lead to different working pressure.  THE ADVANTAGES OF ST37.4 COLD DRAWN HYDRAULIC TUBE DIN highly accurate,  cold drawn seamless tube  and bright seamless hydraulic tubes is used as the tube to be phosphated. The phosphated is realized with the imported chemical fluid to form a black film. The antirust oil is absorbed by means of the micropore on the film to prevent from the rust. The caps are covered at two ends of tube to prevent from the dust. High accuracy, excellent brightness, no oxidization on the outer and inner walls after heat treatment, high c...