People often need to design helical gears and Autodesk Inventor makes it easy to do. What I like most about this is you don't need to make gears, you can twist all kinds of shapes.

Step 1: Create a New Sketch in Inventor

Select Create New 2D Sketch and select a plane to sketch on

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More by TSTricky:Space Ghost Glove @TechShopMP: 3D Printed Radio Knobs @TechShopMP: make your own Poker Chips with a Laser 
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