This standard applies to half-moon keyway milling cutters (hereinafter referred to as milling cutters) used for machining half-moon keys and keyways whose nominal dimensions correspond to 1 x 4 to 10 x 32 mm as specified in JIS B 1301 (Keys and Keyways). stipulate.
JIS B 4230:1999 history
1999JIS B 4230:1999 Milling cutters -- Woodruff keyseat cutters