Seismic steel ball bearing is a bearing bridge bearing the earliest form. It is composed by a wide flat steel lubricated steel ball bearings professional moving quotes, in order to reduce friction plate contact surface, so as not to impede the longitudinal sliding contact surface can be planed on planer steel and coated with a graphite lubricant. The stereotype of thin steel plate sandwiched inspection, although helpful, but the stereotype is often squeezed out. If we can remove the dirt, dust, then inlaid with bronze self-lubricating graphite compound tablet will be able to work well. The amount of displacement of the single plate bearing is limited, and the support end of the beam can not be completely free to rotate. We determine the bearing disposal options based on the structural characteristics of the first bridge, around the web for the separation of structure, left and right, respectively, to operate the replacement pieces. Taking into account the structure of the bridge structure for the whole cast, respectively, from the top to avoid shear failure on the deck should be used at the same time from the top way. From the top of the equipment used should be considered unfavorable influence of various factors, access to more than 1.2 times the weight of the lifting calculation as the basis for selecting device. Second calculated bearing compressive modulus of elasticity permissible value (actual compressive elastic modulus have been unable to test measured), calculate the value of a constant external load bearing upper bear bearing according to the shape factor. Preparation for construction (1) according to the determined construction program, good working platform construction site erection, requiring replacement of a set of bearings erection every two brackets, such as the replacement of the bearings require abutment abutment and a location of the erection of a pier work platform, to facilitate the construction and monitoring of the operator to use, the work platform to be solid and reliable, to ensure the safety of personnel. (2) carry out the jack, pump supporting calibration. This bridge calibrated total of 16 sets of flat steel ball bearing jack, 14 sets of equipment used to from the top, the other two to spare. (3) selection of the original holder of the same model new stand, and make a new test for detection of bearing work, supporting bearing dust cover. Seismic steel ball bearing material hardness as follows: roll axis material hardness of HV200 slide ball bearing steel works, hard steel core material hardness HV300, hardness after a hard surface treated steel will reach HV500 ~ 650. Allowable stress design bearing materials: Hertz contact stress (1) allowed when the friction coefficient of 0.015, in order to 2000MPa, when the friction coefficient of 0.010, in order to 1700MPa. (2) the upper and lower plates bearing the main bending allowable stress 210MPa, the main plus additional force to 240MPa. Seismic steel ball bearings using Salinger, its weight and height is generally only 50% of ordinary steel bearing steel ball bearings using high seismic intensity as a solid lubricant material brass, cylindrical or spherical support, to use surface rotation, the use of the plane to the horizontal displacement. The low seat height of the building seismic steel ball bearing manufacturers, low coefficient of friction and stable, easy to manufacture and inexpensive. Seismic steel ball bearing friction coefficient of 0.15, the measured friction coefficient is only 0.03, so it is very safe. But to ensure a lot of friction of steel corrosion does not occur, usually chrome or stainless steel inlay. Wide steel ball bearings lubricated moving professional steel ball bearings _ quote _ quality assurance provided by the Hengshui Rubber Co. Guangrun. Hengshui Guangrun Engineering Rubber Co. (www.grgcxj.cn) strong, credible, Hebei Hengshui site construction materials industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Guangrun Rubber Company and you work into the brilliant, for a better future!