Bearing for inspection according to the relevant provisions

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In the bearing to check, we must according to the relevant provisions, below we will introduce the specific matters.steel ball bearing
A, the provisions of the mea surement area for bearing inside or outside diameter measurement, the domestic regulations in the southern tip of the left ring surface is one of the biggest chamfering coordinates within area measurement, and foreign regulations for leave the ring two face each for two times chamfering coordinate area within the measurement.
Second, the provisions of the measuring instrument used in measuring the instrument must be calibrated, and with measured bearing adapt to the precision and amplification ratio.
Three, nose radius and inventory pressure in order to reduce the measurement error, must be in May, within the scope of the inventory to reduce the pressure measuring force, and increase the measuring head of radius of curvature.
Four, the size of the provisions of the benchmark used in comparative measurement method for the bearing size tolerance measurement, provisions dosage block or standard as the size of the comparative measurement datum, the gauge block mus t conform to standard JB/T1078 the gauge block "regulation, standard parts must comply with the provisions of the competent department of factory.
Five, the provisions of the measurement datum for the average rolling bearing, measurement take ring not print face as the datum plane, for angular contact ball bearings and tapered roller bearing, take bear thrust load end for datum.bearing suppliers