抄録
An etching-cutter, designed for the inclined as well as normal cutting of metal crystal rods, has been constructed. Vinyl-chloride (subjected to the setting treatment) and Saran have been found most suitable as the string of the cutter. Cutting of tin, zinc, iron, and copper crystals can be done in a comparatively short time, showing a smooth cut surface, while cutting of nickel, aluminium, and bismuth crystals requires a long time and produces a rugged, stepped or roughened cut surface. Inclined cutting of cylindrical crystals can practically be made for the inclination of more than 45° against the rod axis. A disk of 1 mm or more in thickness can be cut off from a large crystal with a precision of ±0.2 mm. The volume of crystal lost by cutting is very small, its width being about two times as large as the diameter of the string used. It has been confirmed by X-ray examination that the cut surface is practically strain-free. Finally, it is shown that the etching-cutter technique is very excellent as compared with the paraffin technique.
