GearKeyCreator \ Tools \ Mechanical-Elements \ Gear
Gear teeth are created as spline entities approximating true involutes. Select Gear from the Tools>Mechanical Elements submenu. The "Gears" dialog box will appear. Enter the information about the gear in this dialog box. Your selections will be displayed in the Preview window.
Select the type of gear to draw, Spur or Internal.
Enter the gear Dimensions. The choices are:
Choose a Representation for the gear. The choices are Top, Wire 3D, and Solid.
Above > 2D and 3D Gears
NOTE: If you attempt to create invalid geometry, you will receive an error message and the previous (valid) dimensions will be displayed.