Crossed roller bearings installed basic steps and use of environmental requirements

Bearing must be installed in a dry, clean environment conditions. Should be carefully checked before installation of shaft and housing mating surface, convex shoulder face, grooves and connecting surface processing quality. All surfaces must be carefully cleaned the mating connector and remove burrs, casting Ex unworked surface must be sand.
Bearing installation should be preceded with gasoline or kerosene to clean and dry before use, and to ensure good lubrication, bearings are generally lubricated with grease, oil lubrication can be. Lubricated with grease should be used free of impurities, oxidation, rust, and other superior performance extreme pressure grease. Grease filling is crossed roller bearings and bearing housing volume 30% -60%, not too much. With sealing structure of the double row tapered roller bearings and water pump bearing grease has been populated, the user can directly use, can no longer be cleaned.
Bearing installation must be on the circumference of the ring face exert equal pressure, push the ferrule may not be a direct hit with a hammer prime tool bearing face, so as not to damage the bearings. In the case of a small amount of interference, it can be pressed at room temperature with sleeve bearing ring face, beating with a hammer sleeve, the sleeve will be pressed into the ring balanced. If large quantities of installation, can be used hydraulic press. Press-fitting, should ensure that outer end face and the housing shoulder, inner end face and the shaft shoulder pressed, does not allow a gap.
First, bearing installation, you should use the appropriate measuring tool according to design drawings on technical requirements, check the shaft and housing bore and the relevant parts of the processing quality (such as dimensional accuracy, shape accuracy and surface roughness, etc.).
Second, the shaft and bearing assembly housing bore any bumps on the surface, burrs, rust or solid particles (such as debris, sand, mud), etc. exist, not only will the bearing installation difficulties and make the installation location is not correct, and solid particles as falling within a rolling start grinding effect, when the bearing rotates rubs or scratches will cross roller bearings work surface, so must be carefully checked before installation, if there is such defects should be corrected. For example, by removing burrs oil filed, raised bump marks, rust and polish with fine emery cloth, and if the cleaning of solid particles, dirt, etc..
Third, the mounting surface should be clean with gasoline, kerosene, toluene or xylene solution to clean clean and dry with a clean rag, then coated with a thin layer of oil, so make the installation more convenient.
Four, temporary installation, open bearings package, it will be immersed in the gasoline and other liquid gently rotated by hand, to ensure that cage, rolling element and raceway surface to be cleaned thoroughly cleansed encapsulated oil.
Five, cleaning a large cross roller bearings, the first with a temperature of 90 ~ 100 ℃ hot oil poured hot oil melted in the package, but the mouth does not drop crumbs seamless tool to dig the net all the old oil, then pour hot minutes then rinse with kerosene to oil, gasoline and then finally cleaned again. After clean washing, gloves should be worn thin the bearing on the work bench clean cloth or paper to dry.
Sixth, pay attention to this Act is not available with sealed bearings cleaned, sealed inside should remain as non-cleanable.
When a large amount of interference, can be oil bath heated by induction heating or crossed roller bearings way to install the heating temperature range is 80 ℃ -100 ℃, the maximum can not exceed 120 ℃. Meanwhile, the application of a nut or other appropriate methods tighten the bearing to prevent the bearing cooling after leaving the ring widthwise shrinkage gap between the shaft shoulder.
Finally, it should be installed bearing clearance adjustment. Clearance values ​​should be based on the use of different conditions and the amount of interference with the size of specifically identified. Necessary, should be tested to determine. cross roller bearing and water pump bearing has been adjusted at the factory clearance, installation without further adjustment.
Bearing rotation test should be carried out after installation, first for rotating shaft or bearing housing, without exception, then in power for no-load, low speed, then gradually increase as the functioning of the rotation speed and load, and to detect noise, vibration and temperature , abnormal, should stop and check. Normal operation test before delivery.