Gear Ratio

No Preference 1.5 2 3

Module

No Preference 1 1.25 1.5 2 2.5 3

No. of Teeth

No Preference 15 20 30 40 45

Shape

No Preference B3 B4

Bore Diameter (A) (in)

No Preference 0.236 0.315 0.394 0.472 0.591 0.630 0.787

Bore Diameter (A) (mm)

No Preference 6 8 10 12 15 16 20

Pitch Diameter (C) (in)

No Preference 0.787 0.886 0.984 1.181 1.476 1.575 1.772 1.969 2.362 2.657 2.953 3.150 3.543 3.937 4.429 4.724 5.315

Pitch Diameter (C) (mm)

No Preference 20 22.5 25 30 37.5 40 45 50 60 67.5 75 80 90 100 112.5 120 135

Outer Diameter (D) (in)

No Preference 0.882 1.045 1.103 1.304 1.323 1.392 1.598 1.739 1.764 1.820 1.997 2.087 2.174 2.205 2.397 2.427 2.609 2.646 2.680 3.034 3.196 3.573 3.641 3.995 4.466 4.794 5.359

Outer Diameter (D) (mm)

No Preference 22.41 26.54 28.01 33.13 33.61 35.35 40.59 44.18 44.81 46.24 50.73 53.02 55.22 56.01 60.88 61.65 66.27 67.22 68.06 77.07 81.17 90.75 92.48 101.47 113.43 121.76 136.12

Total Length (F) (in)

No Preference 0.543 0.593 0.730 0.733 0.735 0.805 0.913 0.985 0.987 1.006 1.058 1.173 1.197 1.223 1.274 1.345 1.347 1.400 1.510 1.512 1.564 1.594 1.604 1.724 1.778 1.805 2.000

Total Length (F) (mm)

No Preference 13.78 15.07 18.53 18.54 18.63 18.66 20.44 23.19 25.01 25.06 25.54 26.87 29.8 30.4 31.06 32.37 34.16 34.22 35.56 38.35 38.41 39.73 40.48 40.74 43.78 45.17 45.85 50.81