pleas suggest me comand.
make the body of cutter by revolve/extrude/cylinder
skech a line with require length of flute. on the plane then use command wrap> sel. sketch > then> body > ok
the curve will be wrapped on the body of the cutter. and sweep the circle as section along the curve. with subtract option... i hope u understand
well i don`t exactly , but i have make a cylinder then make a helix curve then swept a small square on that helix , then make array (associative copy) of this swept , subtracted the array from the cylinder.
i have submitted a part , i have i will help you , good luck