Bushes Bushes quality inspection test is based on the quality of castings; casting map file European standard pulley casting, casting delivery and acceptance of standards and technical conditions. Bushes into casting casting quality and appearance quality internal quality castings. Casting appearance quality including; casting dimensional tolerances, surface roughness of casting, casting weight tolerances, Riser residual amount, casting welding quality and surface defects; intrinsic quality cast including; mechanical properties of casting and chemical properties, chemical composition, microstructure organization, internal defects. In addition, the cast also includes the relevant standards or technical delivery conditions required by a variety of special physical and chemical properties. According to a large pulley, Bushes casting quality test results pulley design, usually cast into three categories; qualified products, rework and waste. Qualified means that the quality and appearance of the intrinsic quality of the casting line with the relevant standards or delivery acceptance criteria; rework refers to the quality and appearance of the intrinsic quality of the casting does not meet the relevant standards or delivery acceptance conditions, but allows repair after repair up to standard casting and delivery acceptance conditions; no rework and rework later still up to standard and acceptance of casting conditions. Pulley casting quality test methods, depending on the Bushes casting production scale, production methods, the importance of casting, casting process maturity and stability, and test items can take full inspection and sampling of two different test methods. Timing Pulleys Timing Pulleys failure analysis of fault analysis is as follows: motor overheating problems during exercise in timing belt pulleys often produced, processed as follows: 1, the proportion is greater than the belt round the medium configuration motor: equipped with the appropriate Timing Pulleys motor. 2, the pressure is too firmly packing gland or mechanical seal spring adjustment too tight: can spring gland or mechanical seal to adjust the amount of compression. 3, equipped with a pump of poor quality, or the existence of friction at the motor and pump shaft no concentric: Quality Check fitted and equipped to remove the fault. 4, wheel and shaft coupling: When the gear or pulley and shaft coupling, when it should be removed the same drive space. Bushes _ _ 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!