Valve SeatsValve seats have three angles - the primary angle refers to the area of the seat . The grinding stone (A) is chosen for correct diameter and coarseness - I used a.grinding and lapping stone for valves,Redneck valve grinding using a drill press carpenters square and a .Jul 8, 2012 . small valve grinding 45 degree resurface on some small valves out of a . grinding using a drill press carpenters square and a honing stone.
grinding and lapping stone for valves