Advent Form Mill

Ever looked at a job that required an operation that you would have to outsource?  Due to the nature of the part, and the form itself, Advent created a special insert on a standard body that provided for a "broached" part, by milling.  How you ask?  See the pictures below, left.  Using a standard shell mill body in a horizontal machining center, precision ground form inserts and a patented system for insert location based on their thread milling design, Advent provided a very stable and repeatable platform with which to mill "serrations" on the bottom of the yoke.  Similar in form to a Stub Acme pitch, duplicating the serration form was not difficult.  Machining takes place with a qualifying pass with a standard milling cutter to obtain a uniform height on all of the cast lugs.  The roughing tool uses 14 inserts and runs @ 600rpm and 14ipm feed.  The finishing tool runs with 7 inserts and the same speed and feeds.  The finishing tool only removes about .005" of material in its single pass.  Both tools consistently see 10,000 parts before insert wear is significant.  The real breakthrough here is best described by 'class of fit' in thread milling terms.  Even a slight deviation from one tooth to another will adversely affect the form of the serration.  As such, lining up of the inserts in the 'Z' axis is key, and the Advent system allows for this easily.