Dust removing attachment device for automatic air files

A dust removing attachment device for pneumatically driven straight-line power files of the type having a reciprocative sole plate comprising, in combination, an elongated, rectangular replacement shoe member, means for removably attaching a flat upper surface portion of said replacement shoe member to said sole plate, said shoe member being substantially hollow to define an end-to-end internal chamber, the underside of said shoe member being formed with a plurality of peripherally-spaced through openings, means energized by pressurized air for creating a vacuum in said chamber operative to withdraw air peripherally from the underside of said shoe member into said vacuum chamber together with abraded particles generated upon use of the automatic air file, a dust bag communicating with one end of said replacement shoe member, said vacuum creating means comprising an air jet directed into the interior of said dust bag through said one end of said dust bag for inflating it with dust-carrying air from said vacuum chamber, said air jet being disposed adjacent said one end of said replacement shoe member, and a second air jet within said vacuum chamber and longitudinally spaced from said first mentioned air jet.