Adjustable insert support

Apparatus for supporting a cutting insert comprising:

• a cylindrical head having an axial and a radial direction and including at least one peripheral slot having a generally flat bottom, a pair of sides which are parallel to one another and tilted relative to the bottom when viewed axially so that the bottom of the slot forms an acute corner with one side and an obtuse corner with the other side, and a back radial face;
• an insert seat having a bottom and a back side which meet at an acute angle conformed to the acute corner of the slot, a rear surface adapted to contact the back radial face of the slot, and a front side with a recess in a generally radial posture, whereby the recess may receive the cutting insert;
• shim means insertable between the bottom of the insert seat and the bottom of the slot to adjust the radial position of the insert seat;
• means for securing the seat in the slot with the back side of the seat flush with the side of the slot forming the acute corner and the bottom of the seat flush with the shim means;
• a wedge insertable between the insert and the side of the slot forming the obtuse corner;
• and
• means for forcing the wedge radially inwardly to confine the insert between the wedge and the seat.