* Distance(mm) Rockwell Scale: C 0.00 60.20 1.59 60.90 3.17 60.70 4.76 60.50 6.35 60.30 7.94 60.40 9.52 60.00 11.11 60.00 12.70 60.10 14.29 59.80 15.87 59.60 17.46 59.30 19.05 59.10 20.64 58.90 22.22 58.60 23.81 58.20 25.40 57.70 31.75 54.70 38.10 51.40 44.45 48.60 50.80 46.00 63.50 43.70 76.20 34.30