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Wrapped Bushing Dimensional Inspection

      Internal diameter test methods:

      Test C (ISO3547-2: Test C)

      To check the inside diameter, the bush is to be pressed into a ring gauge, whose nominal diameter corresponds to the 

dimention specified in ISO3547-1: 1999. The inside diameter shall be measured with a 3-point measuring instrument or checked 

with a  GO and NO GO plug gauge. The GO plug gauge shall be inserted by a minimum effort. The NO GO plug gauge shall not be 

inserted by manual pressure (maximum force 250N). In order to enable the manufacturer and the customer to compare results of 

this test it should be agreed whether results should be obtained by measuring or by gauging.

      Thrust washer test method:

       Beside the thickness, the flatness of washer is also important for washer and grinding parts' usage age. We use very 

helpful test in which the washer falls through the gap between two plain parallel plates of a gauge under its dead weight. 

The plates must be big enough to cover the whole washer.

       Wall Thickness test method:

      The wall thickness is measured at once, two or three positions axially according to the bearing dimensions. The wall 

thickness and the inside diameter shall not be specified together on the same drawing.