UA51906U - Adjustable drill jig - Google Patents

Abstract

An adjustable drill jig is made in the form of an upper plate with a stepped cylindrical hole, into which a radial bearing is pressed, which axis is coaxial with the axis of drill, and above the end of bearing and jig bushing a protective plate is installed and rigidly attached to the jig plate. On the face of the protective panel along the perimeter of the outer ring of the bearing a collar is made, by which the protective plate contacts with the outer ring. Into the inner ring of radial bearing from above a removable jig bushing with a collar is pressed, the collar length is less than the width of bearing with possibility of circular turning with the inner ring of bearing and the drill. In addition, from below in the outer ring of the bearing an annular groove is made, which is in interaction with a retaining ring, which inner diameter is in interaction with an external annular recess of inner ring from below of the bearing. In addition, in the area of installation of the drill on the top of jig plate a through stepped hole is made, in which a removable ring is installed, which is fixed in the stepped through hole by pins. Along the perimeter of the inner ring of bearing from above and from below grooves are made with diameters that are larger than the external diameter of the inner ring of minimum height, with possibility of its free turning..