Record disc cutting stylus

摘要

A record disc cutting stylus comprises a cutting stylus body which is held at its upper end by a shank. At its lower end, there is a stylus tip portion which has a mirror surface, a relief surface with a relief angle gamma , and a burnishing facet with a burnishing angle beta and a burnishing facet width d. The burnishing angle beta is as large as possible, and the width d and the relief angle gamma are as small as possible. The stylus projects distance l between the lower end face of the shank and the extreme tip of the stylus tip portion, which projection is as small as possible. The burnishing angle beta has a value substantially within a range of 25 DEG to 40 DEG ; the burnishing facet width d is substantially within a range of 0.5 mu m to 3.0 mu m; the relief angle gamma is substantially within a range of 30 DEG to 40 DEG ; and the stylus projecting distance l is substantially less than 2.0 mu m.