JIS R 6243:2003

This Standard specifies the maximum permissible values of unbalance for various grinding wheels of JIS R 6211-12 to JIS R 6211-16 in the as-delivered condition, with outside diameter equal to or greater than 150 mm and with a maximum operating speed, vs, equal to or greater than 16 m/s. It also specifies the method for measuring the unbalance and the practical method for testing whether a grinding wheel is acceptable or not.This Standard applies to bonded abrasive grinding wheels in the as-delivered condition.This Standard does not apply to diamond, cubic boron nitride (CNB) or natural stone grinding wheels; centreless control wheels, lapping wheels, disc wheels (for precision grinding), ball wheels or glass grinding wheels.