ISO 6103:2014 specifies the maximum permissible values of unbalances for bonded abrasive wheels with an outside diameter D ≥ 125 mm and maximum operating speed vs ≥ 16 m/s, in the as-delivered condition. It also specifies the method for measuring the unbalance and the practical method for testing whether a grinding wheel is acceptable or not.It is applicable to bonded abrasive wheels in the as-delivered condition.It is not applicable to diamond, cubic boron nitride or natural stone grinding wheels, or to centreless control wheels, lapping and disc wheels, ball wheels or glass grinding wheels.