for performing particular operations

Full Title

Methods for forging, hammering, or pressing (for working sheet-metal or metal tubes, rods, or profiles B21D; for working wire B21F); Special equipment or accessories therefor > for performing particular operations

Child Classifications

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• B21J 5/063
• B21J 5/068
• B21J 5/08 Upsetting
• B21J 5/10 Piercing billets (in combination with extrusion B21C23/00)
• B21J 5/12 Forming profiles on internal or external surfaces (making screw-thread by forging, pressing, or hammering B21K)