The tile sample is pressed under a specified load against a grinding path, strewn evenly with an abrasive power revolving at the rate of 30±1 revolutions per minute. The wear of the tile is measured using a thickness gauge. The abrasion testing machine consists of a replaceable grinding path fitted on a disc rotating about its vertical axis. The rotating disc and the grinding path are enclosed by a circular tray. A bracket holds the specimen. The loading is by a counter balanced lever. A funnel is provided to facilitate charging the grinding path with a brass sive power.Supplied complete with automatic pre-set revolution counter and one 7.5 kg. weight but without abrasive power and thickness gauge.