Spur gear

Last crawled date: 2 years ago

To create the teeth:

- create the pitch circle, dedendum circle and base circle

- create an equation curve with:
* y: (your base circle/2)*(cos(t)+t*sin(t))
* x: (your base circle)*(sin(t)-t*cos(t))
* tmin: not zero
* tmax: outside your addendum circle

- join the end of the curve with your dedendum circle

- place an arc on your pitch circle with a concentric constraint (its length should be your width of space)

- join the middle of the arc and the center point with a line

- mirror the curve and its line to the opposite side of the center line

- join the ends on the dedendum circle with a concentric arc

- connect the ends outside the addendum circle with a line, not cutting in to the circle

- extrude through all

- apply the fillets and chamfers on the teeth

- duplicate using the circular pattern tool by choosing the previously made extrusion and fillets, the correct axis and by putting the number of teeth as the occurrence count