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Oil bearing the traditional: because of the noise is low, the advantages of self lubrication, oil imports the bearing has become the computer CPU fan favorite import bearings, large market demand; in addition, as more and more requirement of noise, application of oily bearings in the daily household electric appliances are also expanding.
The working performance of the basic requirements for materials imported bearings depends largely on imported bearings. Selection of manufacturing rolling is suitable imported bearing materials, will have great influence on its performance and lifetime. In general, the main destroy form of rolling bearings is fatigue spalling force under the action of alternating, and due to friction and wear and the imported bearing precision loss. In addition, the non normal damage and crack, indentation, rust and other causes of imported bearings. Therefore, the rolling bearing should have high resistance to plastic deformation, friction and wear less, rotation accuracy, good dimensional accuracy and stability, and longer contact fatigue life. And many of the performance is determined by the material and the heat treatment process..
First of all, limitation of size. Space is usually bearing device is restricted. In most cases, the shaft diameter (or bearing diameter) is based on the mechanical design or other design constraints. Selection of bearing type and size is decided according to the inner diameter of the bearing. Thus, the secondary dimension table specification bearings are based on the international standard diameter size and the preparation of the.
Size specification of the best single way bearing, using standard bearings in mechanical installation design (this design to the bearing can be easy to sell, here as an aside, some bearing catalog models do, but some non-standard bearings in China large ocean areas without spot, sometimes futures will for a long time, so in the bearing the selection must consider the cost and time - change cost) bearing load, load exerted on the bearing, the nature, size, direction is changeable. Usually, additional basic load are displayed in the dimension table. Axial and radial loads and so on, are also important factors suitable selection of bearing. When the ball and needle bearing size phase advance, needle roller bearings typically have a higher load capacity and accept the larger vibration and shock loads.
Speed, speed is allowed according to the type of imported bearings, size, precision, cage type, load, smooth, determining factors and cooling method. Bearing table lists the standard precision bearings with oil and grease smooth smooth under the permitted speed. Usually, deep groove ball bearings, self-aligning ball bearings and cylindrical roller bearings are suitable for high speed operation place.
Bearings, bearing size and rotation precision is based on ISO and JIS. On the requirements of high precision and high-speed operation of the machinery, the proposed use of level 5 or above precision bearings, deep groove ball bearings, thrust ball bearings or cylindrical roller bearings are suitable for high running precision machinery. Rigid, when the roller and raceway contact surface pressure bearing, can generate elastic deformation. Some of the machinery demand will be reduced to minimum elastic deformation. Roller bearing ball bearing elastic deformation of small.
In addition, import bearings under certain conditions to be applied pressure to add rigidity. This sequence is usually used for deep groove ball bearings, thrust ball bearings and tapered roller bearing outer ring bias, bent shaft, shaft or bearing box tolerance changes, combined with errors will lead to the outer ring of the fair. In order to avoid excessive fair angle, 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 based on high precision standard manufacturing, so the noise and small torque. Deep groove ball bearings, cylindrical roller bearings are suitable and of low noise, low torque have special requirements of the place.
Apparatus and assembly, some places need often assembly and device, to ensure that can stop the detection and repair of demand. The inner and outer rings can bearing discrimination device such as: cylindrical roller bearings, needle roller bearings and tapered roller bearing, very suitable for this place. Self aligning ball bearings and taper hole self-aligning roller bearings on the shaft under the assistance, also simplifies device order.