Deep groove ball bearings in accordance with the size can be divided into?

Deep groove ball bearings in accordance with the size can be divided into? Source: bearing | last updated: - 2020 04 - 02 deep groove ball bearings in accordance with the size can be divided into: ( 1) Miniature bearing - - - - Nominal diameter size range of 26 mm below the bearing; ( 2) Small bearings - - - - Size range for 28 - nominal diameter 55 mm bearing; ( 3) Small and medium-sized bearings - - - - Size range for 60 - nominal diameter 115 mm bearing; ( 4) Large bearing - - - - Nominal diameter size range is 120 - The 190 mm bearing ( 5) Large bearing - - - - Nominal diameter size range is 200 - 430 mm bearing; ( 6) Oversize bearings - - - - Size range for the 440 mm above the nominal diameter of the bearing. Deep groove ball bearing can be used for transmission, instruments and meters, electric machinery, household electrical appliances, internal combustion engines, transportation vehicles, agricultural machinery, construction machinery, engineering machinery, the yo-yo roller type rollerblading, etc. The two installation methods of deep groove ball bearing and deep groove ball bearing a force fit installation method: bearing inner ring and shaft tight fit, outer ring and bearing hole is a loose fit, press the bearing to be pressed on the shaft are available, and then put the shaft together with the bearing load bearing hole, when pressed on the bearing inner ring end face, cushion the assembling casing made of a soft metal materials ( Copper or mild steel) , bearing outer ring and bearing hole tight fit, inner ring and the shaft is a loose fit, bearing can be pressed into the bearing hole first, then assembling casing diameter should be slightly less than the diameter of a hole. If the bearing ring and shaft and hole is a tight fit, install indoor ring and outer ring to pressure into the shaft and hole, at the same time assembling casing structure should be able to at the same time, so the bearing inner ring and outer ring end face. Deep groove ball bearing installation method two heating cooperates: through heating bearing or bearing seat, by using thermal expansion will fit into a loose fit installation method. Installation method is a kind of common and energy saving. This method is suitable for interference quantity larger the installation of the bearing, the bearing before hot charging type or separable bearing ring into the fuel tank 80 - uniform heat 100 ℃, and then loaded on the shaft, as soon as possible out of the oil to prevent inner ring after cooling end face and shoulder joint is not tight, bearing axial fastening again after cooling. Bearing outer ring and light metal bearing seat tight fit, by heating the hot charging method of the bearing, can avoid the mating surface scratch. Heating tank with bearing and should be at a certain distance from the bottom of a mesh, or hanging hooks in the bearings, bearing on the bottom, in case of heavy impurities into the bearing or uneven heating, fuel tank must have a thermometer, strictly control the oil temperature shall not exceed 100 ℃, in order to prevent the tempering effect, reduce the hardness of the ring. ”