First, the limitation of size.
FAG bearings can usually installation space is restricted. In most cases, the shaft diameter (or FAG bearing diameter) is based on the mechanical design or other design constraints. So FAG bearing type and size are selected according to the inner diameter of the bearing and the decision of FAG. Thus, the main dimensions of standard FAG bearing table according to the international standard diameter size and the preparation of the.
Standard form of FAG bearing size range, in the design of mechanical device is best when using standard FAG bearings (this design to the FAG bearing is easy to buy, here as an aside, some FAG bearing catalog model does, but some non-standard FAG bearing in mainland China does not have a spot, sometimes futures will for a long time in the FAG, so the bearing selection must consider the time cost and a late replacement cost) FAG bearing load applied on the FAG bearing load, the nature, size, direction is changeable. Typically, the basic load rating are displayed in the dimension table. Axial and radial loads and so on, are also important factors for the selection of FAG bearing. When the size of the ball and needle bearing, needle roller bearing load capacity of FAG usually have a higher vibration and shock loads and withstand greater.
Secondly, speed.
Allowed speed according to the type and size of FAG bearings, precision, cage type, load, lubrication, and cooling method to determine factors. FAG bearing table lists the standard precision FAG bearings in the lubricating oil and grease lubrication allows speed. Usually, deep groove ball bearings, self-aligning ball bearings and cylindrical roller bearings are suitable for high speed operation of the occasion.
Again, FAG bearings.
FAG bearings are precision of size and rotation accuracy is based on the ISO and JIS standard. For the requirement of high precision and high-speed operation of the machinery, recommend the use of FAG bearings are precision of level 5 or above, deep groove ball bearings, thrust ball bearings or cylindrical roller bearings are suitable for high running accuracy of machinery. Rigid, when the roller and raceway contact surface pressure of FAG bearing, can generate elastic deformation. Some machines need to keep to a minimum the elastic deformation. Roller bearing ball bearing than FAG FAG the elastic deformation of small.
In addition, in some cases to exert preloading of FAG bearings to increase rigidity. This procedure is usually used for deep groove ball bearings, thrust ball bearings and tapered roller bearing inner ring and the outer ring of the bias, bent shaft, shaft or bearing box changes with FAG tolerance, errors will cause the eccentricity of the inner and outer rings. In order to prevent the eccentric angle is too large, self-aligning ball bearings, self-aligning roller bearings, or self-aligning bearing seat is the better choice. Voice frequency and torque, the rolling bearing is according to the high standard of precision manufacturing, so the noise and small torque. Deep groove ball bearings and cylindrical roller bearings, suitable for low voice, low torque occasions with special requirements.
Installation and disassembly, some applications require frequent disassembly and installation, to ensure that can detect and repair regularly. The inner ring and the outer ring can be FAG bearing are respectively installed such as cylindrical bearings, needle roller bearings, and is very suitable for the occasion of tapered roller bearing. Self aligning ball bearings taper hole and a self-aligning roller bearing in the axle sleeve's help, but also simplify the installation program.
(1) before the FAG bearing installation, should the requirements prescribed by the appropriate measuring tool according to the design drawings of the technology, check the shaft and hole and the relevant parts of the processing quality (such as the dimensional accuracy, shape accuracy and surface roughness, etc.).
(2) the assembly surface of the shaft and the bearing seat hole such as scratches, burrs, rust or solid particles (such as debris, sand, dirt) etc. exists, not only makes the FAG bearing installation difficulties and make the installation position is not correct, and solid particles such as falling into the FAG bearing will grind done, when the work the surface of FAG bearing rotation rubs or scratches will FAG bearings, so before installation must be carefully check, if found to have the above defects, should be corrected. Such as the use of oil removing burr, bump touch file mark, rust, and with fine emery cloth polishing, such as cleaning solid particles, dirt, etc..
(3) should be clean gasoline, mounting surface kerosene, toluene or xylene solution cleaning clean, and with a clean dry cloth, then coated with a thin layer of lubricating oil, which can make the installation more convenient operation.
(4) near the open FAG bearings when package is installed, it will be immersed in the liquids such as gasoline to hand gently rotate, to ensure that cage, rolling body and rolling package oil road surface is thoroughly clean.
(5) a large number of FAG bearing cleaning, first with a temperature of 90 ~ 100 DEG C engine oil pour hot oil to make the package melting, also for seamless export and not falling debris tool to dig net all the old oil, and then poured hot a few minutes, and then rinse to kerosene oil, finally re-use gasoline clean again. Clean, should wear gloves of the film bearing in a clean cloth or paper to dry.
(6) note with sealed bearings not used this law to clean, sealed inside should remain as it is capable of cleaning.