| 摘要 |
PURPOSE:To prevent a tape from being damaged at the time of use by forming a uneven part on the surface of a pin-like substrate consisting of a non-magnetic body by grinding in a direction rectangular to its axial direction, then treating the uneven part by a super finishing method to form a highly head surface layer. CONSTITUTION:A brass tube 1 e.g. is used as a base body, cut off into prescribed size, both the cut surfaces 2, 3 are planed off, the external surface is ground by centerless working or the like, and super finish grinding for said ground surface is executed by lapping work or the like using a grind stone consisting of fine particles to smooth the rough surface of the substrate generated by the preceding grinding. Then, chrome plating 6 with proper thickness and proper hardness is applied to round a projected sharp part on the uneven part generated in a direction crossing with the axial direction on the surface of the substrate 1. The use of the tape guide constituted of said procedure makes it possible to use a tape for a long period without damaging the tape.
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