(1)   measurement of the temperature measurements provided the ambient temperature is 20 ℃, including bearings, gauge blocks, standard parts and measuring instruments must be the same temperature, put them above the metal plate with a fastest way to to achieve the necessary temperature balance, otherwise take hours or even days to achieve this balance. In order to get the correct measurements, mechanical measurements rely on foreign manpower in order to avoid contact with these objects, or wear insulated gloves to operate.

(2) provisions for measuring area bearing bore or outside diameter measurement, leave the ring in the southern end of the domestic requirement for a maximum chamfer surface coordinates of the area within the measurement requirements of foreign multi-rings at both ends in the left side of the two times within areas chamfering coordinate measurement.

(3) the size of benchmark requirement for the use of comparative measurements of the bearing tolerance measurement pairs, the amount of block requirement or standard for comparison measured the size of the base, which must meet the standard gauge block JB/T1078 "gauge block" provision, criterion parts manufacturing department must meet the requirements.

(4) The provisions of measuring instruments used in measuring instruments must be calibrated, and has adapted with the measured precision of the bearing and the amplification ratio.

(5) Allow for measurement error in principle; allow the measurement error in the tolerance of 10%.

(6) Meter probe radius and the pressure to reduce measurement error, we must be within the range, and strive to reduce the pressure meter - measurement of force, and increase the radius of curvature of the probe. In the measurement of the bearing inner and outer diameters, the measured force and the probe with the radius of curvature can refer selected.

(7) measurements with the spindle in the measurement of bearing Kia, Kea and Sd other projects, for the cylindrical bore, the use of taper spindle taper principle, defined as 1 / 5000 a l/10000, for the tapered hole uranium bearing, the use of taper The basic provisions of spindle taper to 1 / 12.

(8) measuring load requirements when measuring Kia, Kea and Sia, Sea and other projects, the need to exert the necessary measurement load, the rolling contact with the ring in a normal position, in order to obtain stable measurements. (9) measured The provisions generally rolling plane, take measurements of non-print face of ring plane, the angular contact ball bearings and tapered roller bearings, take the end thrust load to bear for the datum.

Routine examination must meet national standards set forth in the conditions.



Other News:
Rolling bearings routine examination requirements
Selection of bearing type
The rolling bearing fastening method
Bearing damage
Cylindrical roller bearing uses
High rigidity bearing applications
Bearing outer ring three repair technology
Maximize the service life of bearings