CHECKING GEAR SIZES Table 3. Checking Internal Spur Gear Sizes by Measurement Between Wires EVEN NUMBERS OF TEETH Dimensions in table are for 1 diametral pitch and Van Keuren standard wire sizes. For any other diametral pitch, divide dimension in table by given pitch. Wire or pin diameter Diametral Pitch 1.44 = No. of Teeth Pressure Angle 14 1 ∕ 2 ° 17 1 ∕ 2 ° 20 ° 25 ° 30 ° 96 94.8750 94.7513 94.6650 94.5212 94.4003 98 96.8752 96.7513 96.6650 96.5212 96.4003 100 98.8753 98.7514 98.6650 98.5212 98.4003 102 100.8754 100.7514 100.6650 100.5212 100.4003 104 102.8756 102.7514 102.6650 102.5212 102.4003 106 104.8757 104.7515 104.6650 104.5212 104.4003 108 106.8758 106.7515 106.6650 106.5212 106.4003 110 108.8759 108.7515 108.6651 108.5212 108.4004 112 110.8760 110.7516 110.6651 110.5212 110.4004 114 112.8761 112.7516 112.6651 112.5212 112.4004 116 114.8762 114.7516 114.6651 114.5212 114.4004 118 116.8763 116.7516 116.6651 116.5212 116.4004 120 118.8764 118.7517 118.6651 118.5212 118.4004 122 120.8765 120.7517 120.6651 120.5212 120.4004 124 122.8766 122.7517 122.6651 122.5212 122.4004 126 124.8767 124.7517 124.6651 124.5212 124.4004 128 126.8768 126.7518 126.6651 126.5212 126.4004 130 128.8769 128.7518 128.6652 128.5212 128.4004 132 130.8769 130.7518 130.6652 130.5212 130.4004 134 132.8770 132.7518 132.6652 132.5212 132.4004 136 134.8771 134.7519 134.6652 134.5212 134.4004 138 136.8772 136.7519 136.6652 136.5212 136.4004 140 138.8773 138.7519 138.6652 138.5212 138.4004 142 140.8773 140.7519 140.6652 140.5212 140.4004 144 142.8774 142.7519 142.6652 142.5212 142.4004 146 144.8774 144.7520 144.6652 144.5212 144.4004 148 146.8775 146.7520 146.6652 146.5212 146.4004 150 148.8775 148.7520 148.6652 148.5212 148.4005 152 150.8776 150.7520 150.6652 150.5212 150.4005 154 152.8776 152.7520 152.6652 152.5212 152.4005 156 154.8777 154.7520 154.6652 154.5212 154.4005 158 156.8778 156.7520 156.6652 156.5212 156.4005 160 158.8778 158.7520 158.6652 158.5212 158.4005 162 160.8779 160.7520 160.6652 160.5212 160.4005 164 162.8779 162.7521 162.6652 162.5212 162.4005 166 164.8780 164.7521 164.6652 164.5212 164.4005 168 166.8780 166.7521 166.6652 166.5212 166.4005 170 168.8781 168.7521 168.6652 168.5212 168.4005 180 178.8783 178.7522 178.6652 178.5212 178.4005 190 188.8785 188.7522 188.6652 188.5212 188.4005 200 198.8788 198.7523 198.6652 198.5212 198.4005 300 298.8795 298.7525 298.6654 298.5212 298.4005 400 398.8803 398.7527 398.6654 398.5212 398.4006 500 498.8810 498.7528 498.6654 498.5212 498.4006 Table 3. (Continued) Checking Internal Spur Gear Sizes Machinery's Handbook, 31st Edition
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