Rolling bearing type and code
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Machinery has a variety of different working conditions; in order to satisfy these detailed application requirements; there are different types of bearings to ensure the actual demand. According to the shape of the roll; the rolling bearings can be roughly divided into ball bearings and roller bearings, According to the primary direction of the load; it can be divided into radial bearings and thrust bearings. /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
1, the type of rolling bearing selection of rolling bearing types are diverse; the following aspects can be considered when selecting; then select. a. The size, direction and nature of the load: ball bearings are suitable for light loads; roller bearings are suitable for heavy loads and impact loads. When the roll shaft receives pure axial loads; thrust bearings are usually used, when the roll shaft receives pure radial When loading; usually use deep groove ball bearings or short cylindrical roller bearings, when the roll shaft receives pure radial load together; there is not much axial load; optional deep groove ball bearings, angular touch ball bearings, cones Roller bearings and self-aligning ball or spherical roller bearings, when the axial load is large; angle contact ball bearings and tapered roller bearings with larger touch angles can be selected; perhaps the combination of radial and thrust bearings is used. This is especially accustomed to very high axial loads or unique requirements for greater axial rigidity. b. Promising speed: There are big differences in the type of bearing. Under normal conditions; bearings with small conflict and low heat generation; suitable for high speed. When drawing, it is necessary to work under the condition that the rolling bearing is below its limit speed. c. Rigidity: When the bearing receives the load; the bearing ring and the roll body will be elastically deformed; the deformation amount is proportional to the load; the ratio determines the rigidity of the bearing. The bearing can be pre-tensioned to improve the rigidity of the bearing. In the bearing bearing depiction; thinking about the combination and placement of the bearing can also improve the bearing stiffness of the bearing. d. Self-aligning function and device error: after the bearing is loaded into the working position; often due to the production of error-forming devices and poor positioning. At this moment, the cause of the shaft and the thermal expansion are often caused; the bearing is subjected to excessive load; the early damage is caused. Self-aligning bearings can overcome the shortcomings caused by device errors; therefore, they are suitable for such applications. e. Installation and disassembly: tapered roller bearings, needle bearings and tapered roller bearings; bearing types that can be separated from the inner and outer rings (so-called separate bearings); easy to disassemble the device. f. Shopping malls: Even the bearings listed in the catalogue; there are certain sales in the mall, and vice versa; the bearings that are not included in the catalogue are produced in large quantities. Therefore, the bearings that should be clearly used can be easily purchased.
2, the rolling bearing code rolling bearing code is a letter plus number to indicate the bearing layout, scale, public service level, skill function and other characteristics of the product symbol. National code GB/T272-93 rule bearing code consists of three parts: The code name is the code name. The code name is the base of the bearing code. The front code and the post code are the compensation of the bearing code; as long as they encounter special requirements on the bearing layout, shape, data, public service level, skill requirements, etc. Used only when needed; usually the situation can be partially or completely saved. a. The fundamental code name indicates the basic type, layout and scale of the bearing. It consists of bearing type code, scale series code, and inner diameter code. Type code scale series code ID code a1, bearing type code with numbers or letters indicate different types Bearing; see the database for details. a2. The scale series code consists of two digits. The first digit represents the width series (radial bearing) or the height series (thrust bearing); the latter digit represents the diameter series. The scale series indicates the inner diameter. The same bearing can have a different outer diameter; and the same outer diameter has a different width (or height); thus it is used to satisfy the various bearing requirements.
3, the inner diameter code indicates the nominal diameter of the bearing. The diameter of the bearing is straight. Example: bearing 2 32 24 2-type code; spherical roller bearing, 32-scale series code, 24-internal code; d=120mm; 6208-2Z/P6 6-type code; deep groove ball bearing, 2-scale series code, 08-inner code; d=40mm, 2Z-bearing with dust cover on both sides, P6-public service level conforms to specification rule 6
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