advanced search self-aligning ball bearing 2208

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advanced search self-aligning ball bearing 2208
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Advanced search self-aligning ball bearing 2208

Double row self-aligning ball bearings have a sphere raceway in the outer ring and a double raceway in the inner ring. This feature give the bearings their self-aligning property, permitting angular misalignment of the shaft relative to the housing. They are therefore particularly suitable for applications where misalignment can arise from errors in mounting or from shaft deflection.

Double row self-aligning ball bearings are mainly used to carry radial loads and light axial loads, but cann't carry pure axial loads  



Load capacity                 140N/mm2 

Temperature                  -195°C ~ +280°C 

Speed limit                     5m/s 

Friction coef(u)               0.04~0.20 

PV Limit(Dry)                  3.6N/mm2 .m/s 



1.PTFE and fibre can protect the shaft while in operation. 

2.It is suitable for the machine required harmless to people because 

of Lead-free. 

3.Goodload capacity and anti-wear. 

4.Bronze and steel have good thermal conductivity. 

5.Anti-corrosion because of surface plating. 

6.It is widely used in general machines,and suitable for food machine,pharmaceutical 

machine,tobacco machine etc.It will subsitute SF-1 series bushings in future because of environment protection. 



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Q:How is the axial clearance of plain bearings large?
Adjust the ring gasket by adjusting the outer bolster of the tile.
Q:What is the bearing force value, how to determine, how to adjust, what is the effect?
Bearing preload value of the end is lower level put a root diameter of 1mm length 100mm wire (A1, A2), motor or pump mechanical corresponding middle bearing upper same diameter and length of wire (B1), and then fasten the bearing shell and lid, with a screw tightening, then open remove the flat wire, so the bearing force value of s=b1- (a1+a2) /2, mm.
Q:How to change the sliding bearings of railway freight cars to rolling bearings?
This is not very good, after all, the railway is demanding, and easily change, I am afraid can not meet the established requirements
Q:What are the consequences of not hammer sliding bearing
The range of viscosity selection is L - ANl5 to L - AN68. High speed, big journal diameter bearings, oil viscosity can be lower, and conversely, oil viscosity should be a little higher.For machine tools, the sliding rails in general working conditions should be lubricated by mechanical oil. The viscosity of the oil shall be determined according to the magnitude, speed, horizontal or vertical temperature of the rail. Horizontal guideway should choose L - AN32 ~ L - AN68 viscosity of lubricating oil, and vertical guide rail should choose L - AN46 ~ L - ANl00 viscosity of lubricating oil.For gear transmission, the actual contact stress between the teeth are often very high, with each point on the tooth surface and the short time, but also engaged in sliding and rolling at the same time, therefore, the formation of liquid film is weak. The lubrication of gears depends mainly on the boundary oil film. The greater the gear load, the higher the viscosity of the selected oil; the higher the speed, the lower the viscosity of the selected oil; the higher the working environment temperature, the higher the viscosity of the selected oil. Under normal circumstances, the gear drive using L - AN46 viscosity of mechanical oil can meet the requirements.
Q:How to determine the length of journal bearings?
First, the pressure on the bearing (ie the pressure of the Bush); two, speed (forming the conditions of the oil film); three, machining accuracy;
Q:What is Babbitt, bearing pad why plating Babbitt.
In the face of Babbitt opened the examination revealed a large area of black, is this because of lubricating oil, or Babbitt materials in long-term operation will appear after the table black, the lubricating oil pressure of 2.5 kg, the temperature is 45-49 degrees. Oil No. 68.
Q:Cooling method and structure of sliding bearing
There is air cooling and water cooling. The so-called air-cooled, in the bearing gland position plus fan, through the cooling groove for cooling, no water cooling effect.
Q:Which is good, rolling or sliding bearings?
The shaft supported by the bearing is called the journal, and the part that matches the journal is called the bush. In order to improve the friction properties of the bearing surface, the antifriction material layer, which is cast on its inner surface, is called the bearing lining. Bearing and bearing lining materials are collectively referred to as journal bearing materials. Sliding bearing applications are generally under low speed heavy load conditions, or maintenance and lubrication of the difficult parts of the operation.Generally, the rolling bearings consist of the outer ring, inner ring, roller and cage.
Q:Why are lubricated bearings lubricated by sliding bearings? Why grease lubrication?
Rolling bearings generally due to the conditions of economic problems, the use of grease lubrication, but also enterprises choose oil lubrication.
Q:What are the bearing capacity of the bearings when they are discharged at the end?
This problem is very complex, you can refer to the sliding bearing monographs, there are detailed analysis, but also a simplified algorithm

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