What is a sleeve-type pulley? Bushes Bushes, is an embedded between the mounting shaft and pulley assembly of a mechanical coupling sleeve which rely on self-locking pulley socket head cap screws on sleeve Bushes specifications, by the sleeve to hold fast mounting shaft. Pulley casting porosity defect analysis for the production of a variety of defects pulleys, pulley large castings, timely analysis and discussion, find out the reasons of manufacturing defects, and to take the necessary preventive measures, which pulley casting quality is very important work. Due to the large pulley casting defects caused by casting repair, and other economic losses caused by the retirement, usually accounts for 5% of gross ·· 10% foundry, so casting has flaws, especially common multiple defects, a careful analysis of relevant personnel organization discussion, find out the real reason, and to take practical and effective preventive measures European standard Bushes, again to prevent such defects, large pulley for improving the quality of castings, improving economic efficiency is very important. Bushes specifications, Hengda Machinery (certified), Heilongjiang Bushes provided by the Texas Hengda Machinery Co., Ltd. Texas Hengda Machinery Co., Ltd. (www.sddzhdjx.com) (www.sddzhdjx.com) is Dezhou, machining leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Hengda Machinery leadership in the staff warmly welcome all inquiries negotiations to create a better future Hengda machinery.