Drill jig

A portable drill jig for guiding a drill bit to bore holes in a surface at any preselected compound angle and supporting said drill bit and a hand drill having a driving shaft with a threaded end and an arbor for supporting said drill bit with a tapped opening for screwably engaging said threaded end for driving said drill bit comprising;

• a frame having bottom surfaces defining a bottom plane for seating upon said surface;
• a support member having a planar face, said support member being pivotally mounted on said frame for angular displacement in a first plane substantially orthogonal to said planar face;
• guide means for guiding said drill bit being linearly displaced relative to said frame in a second plane substantially orthogonal to said planar face of said support member;
• and
• means for pivotally mounting said guide means on said support member for angular displacement in a plane substantially parallel to said planar face of said support member,
• said guide means comprising arbor extension means threaded at one end for screwably engaging the tapped opening of said arbor and tapped at the other end for screwably engaging the threaded end of said driving shaft and bearing means for rotatably supporting said arbor,
• whereby linear displacement of said guide means relative to said frame with said arbor extension means screwably engaging said arbor and said drive shaft allows said drill bit to drill a hole in said surface at any preselected compound angle related to the angular displacement of said support member in said first plane and the angular displacement of said guide means in said plane substantially parallel to said planar face of said support member.