DIFF Subgroup
B23F 21/22 Face-mills for longitudinally-curved gear teeth
Introduced: September 1968
Full Title
Tools specially adapted for use in machines for manufacturing gear teeth > Milling tools > Face-mills for longitudinally-curved gear teeth
Of 2 combined children, 1 exist in both systems.
1 codes are CPC-only extensions.
IPC defines codes here since 1974.
Child Classifications
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- B23F 21/23 with cutter teeth arranged on a spiral curve for continuous generating processes since 1974 +1 CPC IPC+CPC Available in IPC and CPC