Arrangements or accessories for enabling machine tools not specially designed only for thread cutting to be used for this purpose, e.g. arrangements for reversing the working spindle for advancing or controlling the threading tool or the work by templates, cams, or the like for cutting thread of conical shape
Arrangements or accessories for enabling machine tools not specially designed only for thread cutting to be used for this purpose, e.g. arrangements for reversing the working spindle for advancing or controlling the threading tool or the work by templates, cams, or the like for cutting thread of conical shape