Patent ID: 6192567
Filing Date: 2001-02-27
Classification: B23B,Y10T

Abstract:
A process for repairing a defective opening in an automotive transmission housing wherein said opening has a first diameter and is located through a wall of a chamber in said housing comprising:providing a drilling jig sized to fit closely within said chamber, said drilling jig having an alignment aperture concentric with said opening when fitted within said chamber,providing and inserting into said alignment aperture a first bushing which closely fits within said alignment aperture, said bushing having a central reamer guide bore with a second diameter larger than said first diameter,fixing said bushing in said drilling jig to prevent rotation of said bushing relative to said jig,inserting and rotating a reamer in said reamer guide bore thereby enlarging the diameter of said opening to said second diameter,removing said reamer and said first bushing from said jig,inserting into said alignment aperture a second bushing which closely fits within said alignment aperture, said bushing having a central reamer guide bore with a third diameter larger than said second diameter,fixing said second bushing in drilling jig to prevent rotation of said second bushing relative to said jig,inserting and rotating a second reamer in the reamer guide bore of said second bushing to further enlarge said opening to said third diameter,removing said reamer and said second bushing from said jig,providing and inserting a repair bushing into said enlarged opening, said repair bushing having a central opening therethrough with a diameter equal to said first diameter and having an external diameter equal to said third diameter.