Where is the 5 deg. you are refering to? is this the lead in where the flutes start, or are the flutes angled from start to end, I dont have much info yet just pic posted.
I would create all the geo. of flutes on small dia shank trode, major dia. of trode being .005-.01 under the chamber dia. CNC mill and index similar to gear, reamer, spline or other shape. drop trode into cavity and vector or orbit out to depth, depending on # flutes may be able to put all on trode at once would have to check to see if flute on trode next to one burning say at 90 deg. in a vector move would distort the shape to be burned next, this geo. is so small may not matter, or like previous post, burn with 2 or 3 blades on trode vector out every 120 deg. this could probably be simulated in cad to see other then that most difficult part is the trode development, and deep tank EDM is not needed. I do blind end work on 24" + shafts regularly, just takes some creative fixturing.
RK |