Helical Gear

Step 1

1. Open ProDesktop and open a New Design.
   
2. Select Options and set units to inches.
   
3. Sketch a circle 6 inches in diameter on the workplane.
   

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4. Extrude the circle to a depth of 2 inches.
   

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5. Shift W to place the solid on the workplane. Select Face on the solid, create a new sketch and call it front tooth, then right click project.
   

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6. Create a verticle construction line from the center of the solid extending through the edge of the circle. Toggle to make it a construction line.
   

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7. Create one half of the tooth from the construction line.
   

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8. Select Line,Mirror and create the profile of the tooth. Complete the bottom of the profile with a construction line.
   

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9. Set the constraints for the tooth. All are .5 inch and set the lower angle at 75 degrees.
   

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10. Zoom in for a better view.
    

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11. Keep up the good work.
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12. Delete the exterior profile leaving only the tooth profile.

13. Now dynamically rotate the solid and place a new sketch on the back. Call it Rear tooth.

14. Project the gear body circle into the sketch.
    
15. Project the verticle construction line in the front tooth sketch and toggle it to a construction line.
16. Draw a construction line at an angle to the verticle construction line a give the angular offset a dimension of 15 degrees.

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