Gear Ratio

No Preference 1.5 2 2.5 3 4

Module

No Preference 1 1.25 1.5 2 2.5 3 4 5 6 8

No. of Teeth

No Preference 15 18 20 30 36 40 45 60

Shape

No Preference B3 B4 B5 BT

Bore Diameter (A) (in)

No Preference 0.236 0.315 0.394 0.472 0.591 0.630 0.787 0.984 1.181 1.378

Bore Diameter (A) (mm)

No Preference 6 8 10 12 15 16 20 25 30 35

Pitch Diameter (C) (in)

No Preference 0.591 0.709 0.738 0.787 0.886 0.984 1.063 1.181 1.417 1.476 1.575 1.772 1.969 2.126 2.215 2.362 2.657 2.835 2.953 3.150 3.543 3.937 4.252 4.429 4.724 5.315 5.669 5.906 6.299 7.087 7.874 8.858 9.449 10.630 11.811 12.598 14.173

Pitch Diameter (C) (mm)

No Preference 15 18 18.75 20 22.5 25 27 30 36 37.5 40 45 50 54 56.25 60 67.5 72 75 80 90 100 108 112.5 120 135 144 150 160 180 200 225 240 270 300 320 360

Outer Diameter (D) (in)

No Preference 0.696 0.810 0.870 0.882 1.013 1.028 1.045 1.050 1.103 1.215 1.304 1.323 1.370 1.392 1.400 1.598 1.620 1.713 1.739 1.750 1.764 1.786 1.790 1.806 1.820 1.997 2.008 2.025 2.056 2.087 2.100 2.174 2.205 2.233 2.237 2.397 2.408 2.410 2.427 2.430 2.609 2.646 2.680 2.684 2.741 2.783 2.799 3.010 3.034 3.196 3.213 3.240 3.426 3.477 3.479 3.500 3.528 3.559 3.573 3.579 3.601 3.613 3.641 3.994 4.050 4.112 4.174 4.199 4.321 4.348 4.411 4.466 4.474 4.746 4.794 4.817 4.854 5.293 5.359 5.369 5.567 5.761 5.933 6.021 6.068 6.391 7.057 7.119 7.146 7.158 7.224 7.989 8.932 8.948 9.492 9.587 10.718 11.865 12.783 14.239 14.291

Outer Diameter (D) (mm)

No Preference 17.67 20.57 22.09 22.41 25.72 26.11 26.54 26.66 28.01 30.86 33.13 33.61 34.81 35.35 35.55 40.59 41.15 43.51 44.18 44.44 44.81 45.37 45.46 45.88 46.24 50.73 51.01 51.44 52.22 53.02 53.33 55.22 56.01 56.72 56.82 60.88 61.17 61.22 61.65 61.72 66.27 67.22 68.06 68.18 69.62 70.69 71.1 76.46 77.07 81.17 81.62 82.3 87.03 88.32 88.37 88.9 89.62 90.41 90.75 90.91 91.46 91.76 92.48 101.46 102.87 104.44 106.03 106.66 109.76 110.45 112.03 113.43 113.64 120.55 121.76 122.34 123.3 134.44 136.12 136.37 141.39 146.34 150.69 152.93 154.13 162.34 179.25 180.83 181.5 181.82 183.5 202.93 226.87 227.28 241.1 243.52 272.24 301.36 324.69 361.66 362.99

Total Length (F) (in)

No Preference 0.463 0.493 0.543 0.575 0.593 0.624 0.643 0.667 0.678 0.703 0.730 0.733 0.735 0.805 0.811 0.813 0.831 0.850 0.865 0.906 0.913 0.953 0.985 0.987 1.006 1.058 1.099 1.123 1.130 1.132 1.173 1.197 1.221 1.223 1.244 1.252 1.274 1.311 1.345 1.347 1.349 1.376 1.380 1.400 1.469 1.498 1.510 1.512 1.536 1.564 1.575 1.594 1.604 1.648 1.669 1.724 1.728 1.736 1.778 1.805 1.878 1.889 1.901 1.911 1.919 1.929 1.980 2.000 2.014 2.067 2.078 2.123 2.125 2.150 2.178 2.198 2.301 2.331 2.340 2.442 2.445 2.463 2.504 2.561 2.622 2.645 2.683 2.696 2.713 2.859 2.954 2.967 3.077 3.297 3.353 3.506 3.858 3.934

Total Length (F) (mm)

No Preference 11.77 12.51 13.78 14.61 15.07 15.85 16.34 16.95 17.23 17.85 18.53 18.54 18.63 18.66 20.44 20.59 20.66 21.1 21.6 21.97 23.01 23.19 24.2 25.01 25.06 25.54 26.87 27.91 28.52 28.69 28.75 29.8 30.4 31.01 31.06 31.6 31.81 32.37 33.31 34.16 34.22 34.27 34.95 35.06 35.56 37.31 38.04 38.35 38.41 39.02 39.73 40 40.01 40.48 40.74 41.86 42.4 43.78 43.88 44.1 45.17 45.85 47.71 47.97 48.28 48.53 48.74 49 50.28 50.79 50.81 51.16 52.5 52.77 53.92 53.97 54.6 55.33 55.82 58.45 59.2 59.43 62.03 62.11 62.56 63.61 65.05 66.59 67.19 68.16 68.48 68.92 72.62 75.03 75.36 78.16 83.74 85.17 89.04 98 99.93