characterised by wear resisting parts, e.g. diamond inserts

Introduced: January 1980

Full Title

Full titles differ between systems:

IPC:

Drill bits > characterised by wear resisting parts, e.g. diamond inserts

CPC:

Drill bits (specially adapted for deflecting the direction of boring ; with means for collecting substances E21B27/00) > characterised by wear resisting parts, e.g. diamond inserts

IPC and CPC are identically structured here. All 5 subcodes exist in both systems.

2 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1980.

Child Classifications

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E21B 10/48 the bit being of core type since 1980 +1 CPC IPC+CPC Available in IPC and CPC
E21B 10/50 the bit being of roller type since 1980 IPC+CPC Available in IPC and CPC
E21B 10/54 the bit being of the rotary drag type, e.g. fork-type bits since 1980 IPC+CPC Available in IPC and CPC
E21B 10/56 Button-type inserts (E21B10/52 takes precedence) since 1980 IPC+CPC Available in IPC and CPC
E21B 10/58 Chisel-type inserts ( E21B10/52 take precedence) since 1980 IPC+CPC Available in IPC and CPC