TABLE OF CONTENTS |
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| Basic Rack of the 20-Degree and 25-Degree Full-Depth Involute Systems |
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| Basic Rack of the 14 -Degree Full-Depth Involute System |
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| Basic Rack of the 20-Degree Stub Involute System |
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| Approximation of Basic Rack for the 14 -Degree Composite System |
| Notation | |||||
| ? = | Pressure Angle | D O = | Outside Diameter | ||
| a = | Addendum = 1 /P | D R = | Root Diameter | ||
| a G = | Addendum of Gear | F = | Face Width | ||
| a P = | Addendum of Pinigikhb on | h k = | Working Depth of Tooth | ||
| b = | Dedendum | h t = | Whole Depth of Tooth | ||
| c = | Clearance | m G = | Gear Ratio | ||
| C = | Center Distance | N = | Number of Teeth | ||
| D = | Pitch Diameter | N G = | Number of Teeth in Gear | ||
| D G = | Pitch Diameter of Gear | N p = | Number of Teeth in Pinion | ||
| D P = | Pitch Diameter of Pinion | p = | Circular Pitch | ||
| D B = | Base Circle Diameter | P = | Diametral Pitch | ||
| No. | To Find | Formula | No. | To Find | Formula |
| General Formulas | |||||
| 1 | Base Circle Diameter | D B = D cos ? | 6a | Number of Teeth | N = P D |
| 2a | Circular Pitch | | 6b | Number of Teeth | |
| 2b | Circular Pitch | | 7a | Outside Diameter (Full-depth Teeth) | |
| 3a | Center Distance |
