Guangzhou State hung pulley manufacturers in the years of production, for the belt pulleys and friction problems have mastered before a fiery pure blue belt pulley friction in effect, will launch various modes of operation. In the belt drive, the friction between the belt and the pulley becomes smaller, the belt will slip on the pulley, so that the machine can not operate normally Bushes supplier, so that the belt can be tightly, increasing the pressure on the belt pulleys, thereby increasing the frictional force between the belt and the pulleys. If the capstan is rotated counterclockwise, then the relative movement of the belt pulley is the clockwise direction of the trend, it is possible to determine the direction of the capstan effect on the static friction of the belt is counterclockwise. Driving wheel and the driven wheel exchange position, or direction of rotation of the drive wheel counter-clockwise. Similarly understood, the capstan frictional force acting on the belt is counterclockwise, the driven wheel frictional force acting on the belt is in a clockwise direction. Large pulleys, Bushes cast only after the final inspection process to meet the requirements of its conclusions, this requirement to load test procedures and technical specifications, and one of its content is not allowed the casting defect types, the emergence of degree, and even inspection and methods are also included in the specification. Bushes test is based on the quality of castings; cast figure, casting files Bushes, delivery and acceptance of standards and technical conditions of the casting. 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, 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 standards or conditions of supply delivery acceptance Bushes, but allows for the repair sleeve Pulley price, after repairing castings can reach the standards and conditions of delivery and acceptance; no rework and rework after casting still up to standard and acceptance conditions. Casting quality test methods, depending on the scale of production of castings, 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. Guangzhou Bushes plant, state-hung brand (certified), Bushes provided by state-hung Machinery Co., Ltd. in Guangzhou. Hung Machinery Co., Ltd. Guangzhou state (www.gzbhjx.com) is Guangzhou, casting leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Hong Machinery leadership in the state with the staff warmly welcome all inquiries negotiations to create the state machinery hung a better future.