Six points to choose the bearing

Source: China Bearing Network Time: 2013-04-22

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When selecting the bearing type, it is very important to grasp the operating conditions of the bearing. Tianjin Hanhuang Seiko will tell you about the six points in the selection of bearings:
1. The size, direction and nature of the load bearing load [bearing load can be indicated by the fundamental additional load; its value is shown in the bearing scale table] bearing load is richly changed; such as the size of the load, whether the radial load, the axial load is One-way is still two-way, the degree of oscillation or impact, etc. After thinking about these elements; then pick the most suitable bearing type.
Generally speaking, the radial load of bearings of the same inner diameter can be added in the following order: deep groove ball bearings < angular touch ball bearings < cylindrical roller bearings < tapered roller bearings < spherical roller bearings 2 . The relative skew of the inner ring and the outer ring dissects the elements of the bearing inner ring and the outer ring that are relatively skewed (such as the deflection of the shaft caused by the load, the accuracy of the shaft and the outer casing or the equipment error); and the selection can be used to such operating conditions. Bearing type. If the relative skew of the inner ring and the outer ring is too large; the bearing will be damaged by the internal load. Therefore, the bearing type that can accept this skew should be selected.
Generally speaking, the skew angle (or centering angle) is allowed to be added in the following order:
Cylindrical roller bearings, tapered roller bearings, deep groove ball bearings (angular touch ball bearings), spherical roller bearings (ball bearings) 3) Bearing type that is just as satisfactory as the mechanical shafting required [bearing when receiving load; rolling The touch part of the body and the raceway will be elastically deformed. "High rigidity" means that the amount of deformation of the elastic deformation is small] in the machine tool spindle and the final stage of the vehicle, and the rigidity of the shaft is improved; It is necessary to improve the rigidity of the bearing.
Roller bearings receive load deformation less than ball bearings. Preloading (negative clearance) on bearings can improve rigidity. This method is suitable for angular touch ball bearings and tapered roller bearings.
3. The bearing space of the bearing can be accommodated in the bearing type in the bearing equipment space. Because the shafting is focused on the rigidity and strength of the shaft when drawing the shafting; therefore, the shaft diameter is usually determined first; that is, the bearing inner diameter. However, the rolling bearing has various scale series and types; Pick the most suitable bearing type.
The following bearings are usually used:
Deep groove ball bearings, touch ball bearings, cylindrical roller bearings 4. Rotational accuracy bearing type with required rotation accuracy [Scale accuracy and rotation accuracy of bearings have been standardized by GB according to bearing type]? Machine spindles, gas turbines and handling machines are required to have high rotational accuracy, high speed and low conflict; Bearings with a precision of 5 or more should be used.
5. Cylindrical roller bearings that can be separated from inner and outer rings; needle roller bearings and tapered roller bearings are more convenient when the equipment is disassembled and timed, and the frequency of assembly and disassembly is adjusted.
6. The speed can be used to the mechanical speed of the bearing type [the limit value of the bearing speed limit is indicated by the limit speed; its value is shown in the bearing scale table] The limit speed of the bearing is not only determined by the bearing type but also the bearing scale, cage type, accuracy grade, load Conditions and smooth methods, etc.; thus; it is necessary to think about these elements when selecting.

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