grinding relief quality measurement of threads and chamfers on taps: the measuring device relief expert is designed for precise measurement of the grinding relief of threads and chamfers on almost all types of straight an......grinding relief quality measurement of threads and chamfers on taps: the measuring device relief expert is designed for precise measurement of the grinding relief of threads and chamfers on almost all types of straight and spiral fluted workpieces. - taps - thread formers - thread milling cutters