Q. Test on complete bearings?

Two bearings should be selected at random from the 'lot'. Various tests should be conducted on these 'test bearings'. These bearings should be excluded from the accepted lot because all the tests given below except 'Shear Modulus test' are destructive tests.

1. Shear Modulus

2. Elastic Modulus

3. Adhesion strength

4. Ultimate compressive strength.

In addition to above tests, the ash content (%) and specific gravity of elastomer of test pieces from test bearing shall be compared with those of corresponding specially moulded test pieces and maximum acceptable variation will be as given below:

Ash content + 0.5%

Specific gravity + 0.2