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车削螺纹时,螺纹车刀刀尖角一般小于螺纹牙形角。前角越大,相差越多。下表为螺纹车刀刀尖角的修正值,供选用。
Turning thread, the thread cutter knife tip angle is generally less than the thread profile angle. The larger the anterior horn, the more the difference. The following table for the thread lathe angle correction, for selection.