The precision of the rolling bearing level

The precision of the rolling bearing points ( The main) Dimensional accuracy and rotation accuracy. Precision grade has been standardized, divided into a level 0, 6 x, 6, 5, 4, 2 levels of six grades. Since a level 0, in turn, improve accuracy, for general purpose level 0 is enough, but in used are shown in table 1 conditions or situations, needs to be level 5 or higher precision. Although more accuracy grade is set by the ISO standards as a benchmark, but its name is different in the national standard. Dimensional accuracy ( Associated with the axis and shell installation project) 1, bearing inside diameter, outside diameter, width and assembly width within the allowable deviation of 2, the roller group months-moons last contact outside diameter and the diameter of the allowable deviation 3, acceptable limit value of the chamfer size 4 bearing rotating accuracy, width to allow changes ( Projects related to the rotator to beat) 1, inner ring and outer ring radial runout and axial runout 2, without the permission of the inner ring allows transverse beating 3 plane inclination to allow change quantity, diameter 4 and the change of the thickness of the thrust bearing raceway allowed quantity 5, tapered hole deviation and allow change quantity allowed bearing type and suitable for precision bearing form applicable standards level deep groove ball bearing GB3070 grade 6 class 5 grade 4 class 2 angular contact ball bearing level 0 6 grade 5 grade 4 level 2 level 0 cylindrical roller bearing self-aligning ball bearing grade 0 level 6 grade 4 level 2 metric tapered roller bearing series ( Single row) GB3070 6th June 5th grade 4 metric series ( Double row and four columns) SB/T53419940 level English series SB/CO/GB3070 T1089Class4Class2Class3Class0Class00 spherical roller bearing thrust ball bearing level 0 6 levels of 5th grade 4 thrust self-aligning roller bearing level 0 standard GB/T30794 bearing hierarchies as G E D C B. Standards such as ISO, JIS, contrast is as follows: bearing form standard precision grade deep groove ball bearings for GB3070 grade 6 class 5 grade 4 class 2 angular contact ball bearing level 0 6 grade 5 grade 4 level 2 level 0 self-aligning ball bearing cylindrical roller bearing grade 0 level 6 grade 4 level 2 metric tapered roller bearing series ( Single row) GB3070 6th June 5th grade 4 metric series ( Double row and four columns) SB/T53419940 level English series SB/CO/GB3070 T1089Class4Class2Class3Class0Class00 spherical roller bearing thrust ball bearing level 0 6 levels of 5th grade 4 thrust self-aligning roller bearing level 0 standard GB/T30794 bearing hierarchies as G E D C B. Standards such as ISO, JIS, contrast is as follows: the precision of standard GB/T30794BCDEGISOCLASS2CALSS4CLASS5CLASS6NORMAL CLASSDINP2P4P5P6P0ANSIABEC9ABEC7ABEC5ABEC3ABEC1JISJIS2JIS4JIS5JIS6JIS0 precision of standard GB/T30794BCDEGISOCLASS2CALSS4CLASS5CLASS6NORMAL CLASSDINP2P4P5P6P0ANSIABEC9ABEC7ABEC5ABEC3ABEC1JISJIS2JIS4JIS5JIS6JIS0 on an article: under the structure of main components of deep groove ball bearing features an article: the methods of improving the precision for installation precision bearing