Apparatus for reforming and restoring the surface of a cylindrical workpiece manually

A device for manually working the surface of a cylindrical metallic workpiece to selectively increase the effective diameter of the workpiece and to reform and restore threads thereon comprising a pair of oppositely disposed C-shaped brackets defining a work receiving opening therebetween for surrounding the work when disposed therein, each of said C-shaped brackets having a plurality of spaced openings therein, said openings in one bracket opposing and being aligned with openings in the other bracket, a plurality of metal forming rollers each having swaging threads on their outer surface, said swaging rollers having opposite end portions, each of said end portions being provided with identical pilot thread sections having pilot swaging threads of progressively increasing crest diameter extending respectively from opposite ends of said rollers inwardly to an intermediate swaging thread section having swaging threads of constant crest diameter to permit thread reforming when said rollers are mounted with either of said roller end portions positioned outwardly of and spaced from said brackets, means for removably securing each of said rollers in a selected opening to obtain a variable dispositional array of the rollers and their engagement with a workpiece disposed in said work receiving opening, to thereby accommodate the device to workpieces of different diameters, said removable securing means including a stub shaft extending through a bore in each of said rollers and extending into one of said openings in said C-shaped brackets, a pair of openings provided in each bracket disposed normal to said stub shaft openings, and opposing handle means extending through said pairs of openings for securing the C-shaped brackets together about the work, whereby the handles can be engaged to move the metal working rollers toward and away relative to the workpiece and the surface of the metallic workpiece is worked manually by grasping the handle means and rotating the C-shaped brackets and associated rollers about the workpiece.