on an external or internal cylindrical or conical surface, e.g. on recesses (B23G1/16, B23G1/22, B23G1/32, B23G1/36 take precedence)

Full Title

Thread cutting; Automatic machines specially designed therefor > on an external or internal cylindrical or conical surface, e.g. on recesses (B23G1/16, B23G1/22, B23G1/32, B23G1/36 take precedence)

Child Classifications

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• B23G 1/04 Machines with one working-spindle
• B23G 1/08 Machines with a plurality of working spindles
• B23G 1/12 Machines with a toothed cutter in the shape of a spur-gear or the like which is rotated to generate the thread profile as the work rotates