Helical broach puller

Broach pulling apparatus for an elongated broach having an axis and a retaining end region, a blade region and a retaining end, an axially extending recess located within the retaining end region axially defined by a first surface oblique to the broach axis located toward the retaining end and a second surface oblique to the broach axis located toward the blade region, an axially displaceable spindle having a socket defined therein substantially coaxial with the spindle axis selectively receiving the broach retaining end region, an axially fixed radially displaceable first set of jaws located within the spindle each movable between an extended inner position engaging the recess first surface and a retracted outer position removing the jaws from the recess, the improvement comprising, a second set of axially fixed radially displaceable jaws located within the spindle axially spaced from the first set of jaws each movable between an extended inner position engaging the recess second surface and a retracted outer position removing the jaws from the recess, an annular collar circumscribing the spindle adjacent the socket and axially displaceable between broach locking and broach release positions, a cam surface defined on said collar, a locking surface defined on said collar axially spaced from said cam surface, the jaws of the first and second jaw sets each including an outer end sequentially engaged by said collar cam surface as said collar is displaced from said release position to said locking position to engage the first and second jaws with the recess first and second surfaces, respectively, said outer ends of the first jaws engaging said collar locking surface and said second jaws engaging said collar cam surface when said collar is in said locking position preventing movement of the jaws toward a retracted position and axially fixing the broach relative to the spindle and means displacing said collar between said locking and release positions.