* Distance(mm) Rockwell Scale: C 0.00 46.90 1.59 46.10 3.17 50.30 4.76 51.40 6.35 52.50 7.94 53.90 9.52 52.10 11.11 53.30 12.70 53.60 14.29 53.60 15.87 53.50 17.46 52.90 19.05 53.00 20.64 54.10 22.22 53.80 23.81 53.00 25.40 53.50 31.75 54.40 38.10 54.00 44.45 54.00 50.80 54.50 63.50 52.00 76.20 30.60