* Distance(mm) Rockwell Scale: C 0.00 82.90 1.59 53.70 3.17 56.70 4.76 57.20 6.35 55.30 7.94 55.20 9.52 58.30 11.11 57.70 12.70 56.40 14.29 55.00 15.87 53.60 17.46 53.00 19.05 52.90 20.64 52.70 22.22 52.40 23.81 50.80 25.40 48.40 31.75 40.50 38.10 37.20 44.45 34.50 50.80 33.50 63.50 32.40 73.02 30.40