for drop hammers

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Hammers; Forging machines with hammers or die jaws acting by impact > Drives for hammers; Transmission means therefor > for drop hammers

CPC:

Hammers; Forging machines with hammers or die jaws acting by impact (hand hammers B25D; electrical features in section H) > Drives for hammers; Transmission means therefor > for drop hammers

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

Child Classifications

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B21J 7/38 driven by steam, air, or other gaseous pressure IPC+CPC Available in IPC and CPC
B21J 7/40 driven by hydraulic or liquid pressure IPC+CPC Available in IPC and CPC
B21J 7/42 operated by rotary drive, e.g. electric motors IPC+CPC Available in IPC and CPC