The accuracy of 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, inner diameter, outer 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 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 GB/T30794 standard could be divided into GEDCB bearing level. Standards such as ISO, JIS, contrast is as follows: standard GB/T30794BCDEGISOCLASS2CALSS4CLASS5CLASS6NORMALCLASSDINP2P4P5P6P0ANSIABEC9ABEC7ABEC5ABEC3ABEC1JISJIS2JIS4JIS5JIS6JIS0 precision accuracy of the selected performance requirements use case applicable precision grade requirements placed body with high precision beating audio, video machine spindle ( Video recorder, recorder) Radar, parabolic antenna axis of machine tool spindle's computers, disk aluminum foil roll neck multi-stage rolling mill bearing P4P5, P4, P2, ABEC9P5, P4, P2, ABEC9P5P4 high-speed rotating turbo jet engine main, auxiliary engine centrifuge liquefied natural gas pump turbo molecular pump, protect bearing spindle of machine tool spindle when tight round of P5, P4P5, P4P5, P4P5P5, P4P5, P4, P2, ABEC9P5, P4 friction and low friction change control machine ( Synchronous motor, servo motor and gyro gimbal) Measuring instrument spindle P4, ABMA7PP5P5, P4, P2, ABEC9 general small precision motors, gear, CAM transmission gear, generator, low pressure induction synchronous servo motor, the rotor, printers, photocopiers, instrumentation P0, P6