Apparatus for offsetting wear in chain saw bar guide rails

Apparatus for offsetting lateral channel wear in chain saw bar guide rails comprising lightweight hand held apparatus for manually aligning the guide rails of a chain saw bar, said apparatus having opposed adjustable roller means for rollingly engaging and moving chain saw bar guide rails together, said roller means secured to base means, said roller means comprising at least one first roller means adjustably secured to said base, at least one second roller means opposed to said first roller means and arranged to form a bite space between said second and first roller means, the axes of rotation of each of said opposed first and second roller means lying in substantially the same plane, said first and second roller means being arranged on said base, means operably engaging said roller means for adjusting said bite of said roller means and comprising screw means threadably engaging threaded hole means in said base for laterally displacing at least one of said roller means in said plane, said threaded hole means terminating in channel means for axially mounting one of said roller means, threaded stud means adjustably extendable from said base towards the outer face of said adjustable roller means for adjusting the depth of bite of said roller means, means for guiding said apparatus along the periphery of a chain saw bar comprising stud means extending from said base in the direction of said rollers for holding said base in alignment with the outer walls of chain saw bar guide rails, said stud means being spaced a distance substantially the same as the thickness of a chain saw bar, means for moving said roller means along the outer walls of the parallel rail of chain saw bar guide rails comprising hand held means for pulling and pushing said apparatus along the periphery of a chain saw bar.