Non-oil bearing water-soluble cutting fluid, the user must make great efforts to control erosion generation, and even the virtual elimination of erosion along in the machine tool maintenance and governance. To prevent water erosion on the metal surface, should be often full of oil lubrication of machine tools, smear grease on the important parts of the machine.
   
Oil-free bearings in the accurate use, you can have a long life. Premature surge of injury, is likely due to selection error, improper use or poor lubrication.
 

1 contact angle perpendicular to the plane of the bearing axis line (radial plane) and after the bearing ring or gasket transmission to the line of the joint effect of the rolling element (the nominal line of action) between the angle.
 
2 The ball (OD) inside (outside) diameter cylinder to a ball bearing.
 
3 roller group (outside) diameter radial contact roller bearings within a roller (outside) then the diameter of the cylinder.
 
4 Nominal bearing the distance between the width of the ferrule end of the two theories (the washer on the back). Used to limit the height of the width of the radial bearing (thrust bearing).
 
5 bearing the actual width of cut to the heart-bearing axis line and limited to the ring of the bearing width of the actual end of two the distance between the plane intersection. Limited to the inner face and outer face of the bearing width.
 
6 bearing the actual width of the deviation of the actual bearing width and the public said the width difference.
 
7 sets of bearing inner ring radial runout Kia inner ring in a different angular position, the difference between the maximum and minimum radial distance between the bore surface and a fixed point of the relatively outer. Surface contacts the bearing parts in the normal relative position of the angular position of the above points, or in its vicinity on both sides at the rolling element and within the outer ring raceway or the inner ring on the back ribs (tapered roller bearings).
 
8 sets of bearing outer ring radial runout of the Kea outer ring in a different angular position, the outer diameter surface and the relatively inner fixed between the maximum and minimum radial distance. Surface contacts the bearing parts in the normal relative position in the angular position of the above points should be in the vicinity of both sides of the rolling element at the outer ring raceway or the inner ring on the back ribs (tapered roller bearings).
 
9 sets of bearing inner ring side face of the raceway beating Sia inner semi-diameter from the inner axis line of the radial distance equal to the inner raceway contact in a different angular position, the inner base face and The difference between the maximum and minimum axial distance between the outer one fixed point. Within the outer raceway contact should be with all the rolling element.
 
10 sets of bearing outer ring side beat the Sea in a different angular position, the outer radial distance from the outer axis line equal to the outer face of the raceway raceway contact half the diameter, the outer ring of the base face and the phase for maximum and minimum axial distance between the inner one fixed point difference. Within the outer raceway contact should be with all the rolling element.




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