Ball bearing enhance product quality supervision is a very important task, by a nationally recognized testing unit to strengthen the authority of the laminated rubber bearing product quality testing room is very necessary, but the last layer encountered some testing unit, testing equipment itself incomplete, the ball bearing detection methods are not familiar, rubber bearing testing personnel untrained, affecting the test results, so that when the revised industry standard ball bearing, in order to facilitate the application, the original "road bridges laminated rubber support Block finished mechanical properties testing rules "(JT3132.3-90) as" roads and bridges laminated rubber bearings "(JT / T 4-2004) standard normative appendix directly included, its contents, in the practical application of basis, and to consider appropriate adjustments were made to add standards in order to better control the quality of products, determine product strengths and weaknesses. Qz in the standard ball bearing, first testing equipment, testing instruments, testing personnel made better requirements. Ball bearing some laboratories, it is not for the press as a ball bearing mechanical testing and design, there are a lot of press in the 20th century, 60 bi-directional ball bearing, 70s obsolete equipment. Ball bearings in many places can not guarantee the accuracy of the mechanical properties of the test seat. So with the progress of time, a lot of things behind must be updated in order to reduce unnecessary equipment behind boiled misjudgment occurred during the test, in the past there have been a result of the press, under the bearing thickness is too thin, not stiff enough lqz Ball bearing, self-test test structure deformation of the case and, in addition, the ball bearing carrier plate plane size is too small, spherical bearings size has exceeded the carrying board inch, resulting in local stress affect the validity of the test results . Ball bearings as an effective bridge structure damping device has been applied abroad bridge device. Vertical stiffness, bearing good performance, supported bridges can stabilize the upper structure, moderate levels of stiffness, which can meet the earthquake generated large displacement. Better performance, ball bearings have the energy absorbing seismic ground brought a large earthquake resistant ball bearing life expectancy under normal circumstances can reach 50 years. Spherical plain bearings are squeezed into a laminated rubber bearings with lead or multi-pin, a bearing structure in order to improve the performance of rubber bearing structure. LRB withstand the weight and horizontal forces of the bridge structure, lead lag pin can produce plastic deformation to absorb energy and to provide horizontal restoring force by rubber, therefore, shot type support both isolation but also has a good effect function, type of bridge structures to improve the seismic zone seismic rating of an ideal seat form. The general structure of rubber bearing structure is simple, according to the Japanese zodiac signs bearing design standards related to damping provided by said pressure is 1500 ~ 2600kn the LRB bearing design and production of finished products. qz ball bearing manufacturers 13,833,855,982 (certified), ball bearings provided by the Engineering Rubber Co., Ltd. Hengshui HaoTong. Hengshui HaoTong Engineering Rubber Co., Ltd. (www.htgcxj.com) in the field of construction materials at the site devoted boundless enthusiasm and passion, Hao-engineering rubber has been customer-centric, the concept of creating value for customers, quality, service to win the market, and sincerely hope to cooperate with the community to create a successful, create brilliant. Related businesses welcomed the inquiry, Contact: Liu.