How to install the bearing cylinder hole

Cylindrical hole bearing is bearing inner ring or outer ring is a cylindrical hole. Depending on the type of bearing, cooperate with different nature, when bearing hole of shaft neck or body with interference is small, can use the pressure into the method of assembly. When interference is, can use the pressure into the method of assembly. When interference is bigger, need to use hot pack assembly. When installing a diameter of less than 70 mm small bearings, don't usually conduct heating can be installed directly. Assembly of large and medium-sized bearings to be heated. During the installation of cylindrical hole bearing often has the following several ways: ( 1) When bearing inner ring and the shaft is a tight fit, loose fit for outer ring and housing holes, can press the bearing being connected to the first axis, then the shaft with bearings in casing hole. Assemble the inside diameter of casing used should be larger than the journal 1 ~ 2 mm, outside diameter should be smaller than rim diameter of bearing inner ring 1 ~ 2 mm, in order to avoid pressure in keeping the frame. （ 2) When the bearing outer ring and housing hole for tight fit, inner ring and the shaft is loose fit, press the bearing outer ring first into the housing hole, using the assembling casing diameter should be slightly less than the diameter of the casing hole. When the installation of 7000 types of tapered roller bearing outer ring, the size of casing used should be paid attention to. Do not allow the casing diameter size is smaller than the inner diameter of the ring makes the casing pressure in the bearing inner ring on the working plane. （ 3) Bearing inner ring and the shaft, the outer ring and shell holes are tight fit, assembling casing can end should be made at the same time compression bearing inner and outer ring width of the circle, or with a disc and assembling casing, make the pressure at the same time to the inside and outside the circle, the bearing pressure into the shaft and housing. This installation method is particularly suited to automatically adjust heart to the heart of the spherical bearing installation. （ 4) Heating installation, bearing the force required for bearing size and cooperate with related to the size of the amount of interference, the interference to the large amount of medium and large bearing commonly used the method of hot charging. The bearing before hot charging or separable bearing ring into the fuel tank or dedicated heater evenly heating to 80 ~ 100 ℃ ( Should not exceed 100 ℃) 。 The skilled operation skills are needed for hot charging bearing. When the bearing after removed from the heating or heater in the tank, shall be immediately with a clean cloth ( Can't use cotton yarn) Wipe grease stain on the surface of the bearing and attachments, and then put forward, on the surface of the bearing in an operation to resist the position of the shoulder. Should always push tight in the cooling process, or with a small hammer by assembling casing tap bearing on tight. When installation should be slightly twisted bearing, in case the installation tilt or jammed. Bearing outer ring and shell holes for tight fit can also be the case after heating load bearing. Especially in light metal manufacturing bearing under the condition of the tight fit, may be because of the pressure bearing outer ring into the damage its surface, the bearing should be heated.