GB/T 1143-2004
ActiveMorse taper shank countersinks for angles 60° and 90°，120° inclusive
60°、90°、120°莫氏锥柄锥面锪钻
Application Summary AI generated
GB/T 1143-2004 specifies the dimensions, tolerances, and technical requirements for Morse taper shank countersinks with included angles of 60°, 90°, and 120°. It is applied in metalworking and machining industries for producing conical recesses around drilled holes to accommodate flat-head screws, rivets, or deburring edges. The standard ensures interchangeability and precision in countersinking operations on machine tools like lathes, milling machines, and drilling machines.
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Transparency note: The application summary and key sentences on this page were automatically generated by AI from the standard's original text. This content has not been human-verified and should not be used for compliance or regulatory purposes. Always refer to the official standard document from the issuing authority.