Fig. 129. CROSS SECTION OF GEAR
All miter gears that you buy ready cut are made so that their shafts run at right angles to each other as shown in Fig. 129, but you can have them cut to order to run at any angle you want.
To find the pitch, pitch diameter, circular pitch, etc., of both spur and bevel gears use these rules:
- π = 3.14159
- p = pitch
- n = number of teeth
- pd = pitch diameter
- od = outside diameter
- cp = circular pitch
To Find the Pitch:
| p | = | n |
| pd |
To Find the Number of Teeth:
| n = p × pd |
To Find the Pitch Diameter: