Precision Grinding Cylindrical, Internal & Surface Internal Honing Centerless Grinding Thread Grinding - Internal & External Jig Grinding O.D./I.D. & Universal Grinders have multiple grinding wheel spindles to facilitate the grinding of multiple O.D.s, I.D.s, faces, angles & radii. Parts can be held either between centers or in a chuck, and multiple operations can often be done in a single setup. Diameters to 10" O.D. Lengths to 52" (Overall Length) Tolerances to .0001" Finishes to 2 micro Multiple diameters, angles, tapers, and radii All materials Diameters to 12" O.D., 14" I.D. Lengths to 48" O.D. (Overall Length), 8" I.D. Tolerances to .0001" Finishes to 2 micro O.D., micro I.D. Multiple diameters, angles, tapers, and radii All materials