Pulley what material? Why iron? Pulleys material is generally cast iron (iron) pulley hub type parts are generally relatively large size of the sheave, the manufacturing process generally casting, forging based. Generally the larger size design for casting methods, materials are generally cast iron (casting performance is better) Bushes models rarely use steel; generally smaller in size, and can be designed for forging, the material is steel. Common gray cast iron, steel, aluminum or plastic and so on. Gray cast iron with a maximum, V≤30m / s when using HT200, V≥25 ~ 45m / s, cast iron or steel, also available in steel stamping - welding cast iron pulley pulley pulley how to ensure the practicality of using the time to ensure that the pulley rational use, practical, avoid pulley appear to be unsuitable for a lot of people sometimes feel pulley size is wrong, in fact, disassembly and assembly when not paying attention well. When disassembling: first between the pulley and the shaft or coupling good position markers, screw factory fixing screws and bolts, and then slowly pull puller. If you can not pull, but on the inside hole to pull pouring kerosene; If you still can not pull, the available emergency fire around the pulley or coupling rapid heating, while the shaft wrapped with a damp cloth and keep cold water to prevent heat into the interior of the motor . Assembly: first with a fine emery cloth to iron shaft, pulley or coupling shaft hole sand smooth pulley or coupling sleeve on the shaft keyway alignment; hard wood with wrought iron or key pad at one end of the pulley, lightweight The key knock light tank; key in the slot to be appropriately tight, too tight or too loose will hurt and hurt key slot, the belt is too loose will slip or vibration. Bushes manufacturers, pulleys, Hengda machinery provided by the Texas Hengda Machinery Limited. Texas Hengda Machinery Co., Ltd. (www.sddzhdjx.com) (www.sddzhdjx.com) strong, credible, in Dezhou machining industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Hengda Machinery and you hand into the brilliant, for a better future!