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

Child Classifications

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• B23G 3/005
• B23G 3/02 for withdrawing or resetting the threading tool
• B23G 3/06 for compensating inaccuracies in the pitch of the lead-screw
• B23G 3/08 for advancing or controlling the threading tool or the work by templates, cams, or the like