Table 5. American National Standard Preferred Shaft Basis Metric Transition and Interference Fits ANSI/ASME B4.2-1978 (R2009) Basic Size a Locational Transition Locational Transition Locational Interference Medium Drive Force Hole K7 Shaft h6 Fit b Hole N7 Shaft h6 Fit b Hole P7 Shaft h6 Fit b Hole S7 Shaft h6 Fit b Hole U7 Shaft h6 Fit b 30 Max 30.006 30.000 +0.019 29.993 30.000 +0.006 29.986 30.000 –0.001 29.973 30.000 –0.014 29.960 30.000 –0.027 Min 29.985 29.987 –0.015 29.972 29.987 –0.028 29.965 29.987 –0.035 29.952 29.987 –0.048 29.939 29.987 –0.061 40 Max 40.007 40.000 +0.023 39.992 40.000 +0.008 39.983 40.000 –0.001 39.966 40.000 –0.018 39.949 40.000 –0.035 Min 39.982 39.984 –0.018 39.967 39.984 –0.033 39.958 39.984 –0.042 39.941 39.984 –0.059 39.924 39.984 –0.076 50 Max 50.007 50.000 +0.023 49.992 50.000 +0.008 49.983 50.000 –0.001 49.966 50.000 –0.018 49.939 50.000 –0.045 Min 49.982 49.984 –0.018 49.967 49.984 –0.033 49.958 49.984 –0.042 49.941 49.984 –0.059 49.914 49.984 –0.086 60 Max 60.009 60.000 +0.028 59.991 60.000 +0.010 59.979 60.000 –0.002 59.958 60.000 –0.023 59.924 60.000 –0.087 Min 59.979 59.981 –0.021 59.961 59.981 –0.039 59.949 59.981 –0.051 59.928 59.981 –0.072 59.894 59.981 –0.106 80 Max 80.009 80.000 +0.028 79.991 80.000 +0.010 79.979 80.000 –0.002 79.952 80.000 –0.029 79.909 80.000 –0.072 Min 79.979 79.981 –0.021 79.961 79.981 –0.039 79.949 79.981 –0.051 79.922 79.981 –0.078 79.879 79.981 –0.121 100 Max 100.010 100.000 +0.032 99.990 100.000 +0.012 99.976 100.000 –0.002 99.942 100.000 –0.036 99.889 100.000 –0.089 Min 99.975 99.978 –0.025 99.955 99.978 –0.045 99.941 99.978 –0.059 99.907 99.978 –0.093 99.854 99.978 –0.146 120 Max 120.010 120.000 +0.032 119.990 120.000 +0.012 119.976 120.000 –0.002 119.934 120.000 –0.044 119.869 120.000 –0.109 Min 119.975 119.978 –0.025 119.955 119.978 –0.045 119.941 119.978 –0.059 119.899 119.978 –0.101 119.834 119.978 –0.166 160 Max 160.012 160.000 +0.037 159.988 160.000 +0.013 159.972 160.000 –0.003 159.915 160.000 –0.060 159.825 160.000 –0.150 Min 159.972 159.975 –0.028 159.948 159.975 –0.052 159.932 159.975 –0.068 159.875 159.975 –0.125 159.785 159.975 –0.215 200 Max 200.013 200.00 +0.042 199.986 200.000 +0.015 199.967 200.000 –0.004 199.895 200.000 –0.076 199.781 200.000 –0.190 Min 199.967 199.971 –0.033 199.940 199.971 –0.060 199.921 199.971 –0.079 199.849 199.971 –0.151 199.735 199.971 –0.265 250 Max 250.013 250.000 +0.042 249.986 250.000 +0.015 249.967 250.000 –0.004 249.877 250.000 –0.094 249.733 250.000 –0.238 Min 249.967 249.971 –0.033 249.940 249.971 –0.060 249.921 249.971 –0.079 249.831 249.971 –0.169 249.687 249.971 –0.313 300 Max 300.016 300.000 +0.048 299.986 300.000 +0.018 299.964 300.000 –0.004 299.850 300.000 –0.118 299.670 300.000 –0.298 Min 299.964 299.968 –0.036 299.934 299.968 –0.066 299.912 299.968 –0.088 299.798 299.968 –0.202 299.618 299.968 –0.382 400 Max 400.017 400.000 +0.053 399.984 400.000 +0.020 399.959 400.000 –0.005 399.813 400.000 –0.151 399.586 400.000 –0.378 Min 399.960 399.964 –0.040 399.927 399.964 –0.073 399.902 399.964 –0.098 399.756 399.964 –0.244 399.529 399.964 –0.471 500 Max 500.018 500.000 +0.058 499.983 500.000 +0.023 499.955 500.000 –0.005 499.771 500.000 –0.189 499.483 500.000 –0.477 Min 499.955 499.960 –0.045 499.920 499.960 –0.080 499.892 499.960 –0.108 499.708 499.960 –0.292 499.420 499.960 –0.580 a The sizes shown are first-choice basic sizes (see Table 1, page 688 ). Preferred fits for other sizes can be calculated from data given in ANSI/ASME B4.2-1978 (R2009). b A plus sign indicates clearance; a minus sign indicates interference. All dimensions are in millimeters. Table 5. (Continued) American National Standard Preferred Shaft Basis Metric Transition and Interference Fits ANSI/ASME B4.2-1978 (R2009)
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