Adjustable quick change tool holder

An adjustable quick change tool holder, comprising:

• an elongated arbor for insertion into an machining apparatus;
• a summetrical tool support member having a U-shaped channel formed longitudinally therein for replaceably supporting a cutting tool projecting from either end thereof and axially adjustable with respect to the longitudinal axis of the arbor;
• a plurality of clamping screws extending from only one side of said tool support member into said channel for clamping the cutting tool within the channel;
• guide means for transversely adjusting said tool support member with respect to said arbor, said guide means comprising a transverse guide portion projecting from said arbor and a mating way portion received into said tool support member, said way portion extending transversely across the tool support member and being open at both ends thereof, an abuttment projecting from said guide portion at an offset location thereof, a transverse channel open across said way portion to accommodate passage of said abuttment therethrough, said channel being open at only one side of the tool support member and ending in an abuttment wall, an adjusting screw extending from an opposing side of said tool support member and projecting into said channel from said abuttment wall for controlling said transverse adjustment of said tool support member with respect to said arbor;
• said abuttment being selectively installed to permit said transverse adjustment from only one of the right or the left side of the arbor;
• stop means for preventing transverse adjustment of said support member from a side opposed to the side corresponding to the selected installation of the directional means, said stop means comprising a pair of apertures symmetrically located at respective opposing sides of said guide portion and adjacent edges thereof, there being only a single abuttment and said abuttment being selectively insertable in only one of said apertures at a time, and said tool support member being reversible from front to back with respect to said arbor by positioning the abuttment in either one of the apertures, said abuttment wall engaging said abuttment to prevent sliding of said support means on said arbor from a side contrary to the selection determined by the insertion of the abuttment in a selected aperture, whereby by front to back reversal of said tool support member, both clamping of the cutting tool and transverse adjustment of the tool support member are achieved from the same selected right or left side;
• and
• means for releasably securing said tool support member at a desired transverse position.