(1) measuring the temperature conditions
Measuring the ambient temperature requirement is 20 ℃, SKF Bearings, gauge blocks, standard parts and temperature measuring instruments must be the same, above them on the same piece of metal plate can be the fastest way to achieve the necessary temperature balance, Otherwise, take a few hours or even days to achieve this balance.
In order to get the correct measurement results, foreign manpower measurement mechanization to avoid contact with these objects or oven mitts to operate.
(2) measurement region in a predetermined
For SKF bearing inner or outer diameter of the measurement, domestic provisions leave the ferrule the southern end surface of each of a maximum chamfer coordinates measurements within the region, while the foreign multiple is defined as the area leaving the ferrule ends face each twice chamfered coordinate Within the measurement.
(3) the requirements of the size of the base
SKF bearings dimensional tolerance of measurement in the comparative measurement method to provide the amount of blocks or standard parts as a comparative measurement of the size of the base, where the amount of the block must comply with the standard JB/T1078 "provisions of the gauge block, standard parts must comply with the manufacturer competent The provisions of the department.
(4) The provisions of the measuring instrument
The instrument used in the measurement must be calibrated, and has adapted to the measured by a SKF Bearing accuracy and amplification ratio.
(5) allow the measurement error
Can, in principle, allow the measurement error in the tolerance of 10% or less.
(6) the radius of the probe and the pressure of the measurement table
In order to reduce the measurement error must be within a possible range, strive to reduce the pressure of the measurement table, - the measuring force and increase the radius of curvature of the measuring head.
In the measurement of the inner and outer diameters of the SKF Bearing, the measuring force and the radius of curvature of the probe can be used with reference to the selection.
(7) was measured with the mandrel
Kia, Kea and Sd projects measuring SKF Bearing for the cylindrical bore, the bearing, with the principle of taper of the taper of the mandrel is defined as 1/5000 of a l/10000, tapered bore uranium Order of the tapered mandrel used basic taper defined as 1/12.
(8) measuring the load of the predetermined
When measuring Kia, Kea and SIA, the Sea project, the need to exert the necessary measurement load, so that the rolling body and the ferrule is in a normal contact position, in order to obtain stable measured values.
(9) the provisions of the measurement reference plane
Generally rolling bearing, taken when measuring the nonprinting end ferrule datum, angular contact ball bearings and tapered roller bearings, whichever withstand the end face of the thrust load datum.


Other News:
SKF bearing normal inspection matters
SKF bearing material requirements
SKF bearing basic points to be noted
The NSK bearings appearance quality checks
Introduction of stable operation of FAG bearings method
Method of selecting reasonable FAG bearing clearance
NSK bearing surface failure analysis
Introduction of SKF bearing noise reduction to maintain lubrication method