how to design cross cut shaft in solid works for shrdder

i want to make a cross cut shaft for shredder pleases help me through out pic of slimier file is attached please check it out

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1 - 2 Extrude a shaft of the correct diameter and length

3 - 4 Create a sketch to represent the missing material, and do a cut revolve

5 pattern the cut along the length of the shaft

7 Sketch a circle on one end, use the Curve tool to create a helix with the correct direction and rotation

8 Sketch a shape to represent the missing material

9 Cut - sweep the step 8 sketch along the step 7 helix

10 Do a circular pattern of the cut sweep

11 Add additional details as needed.

SolidWorks model is in 2016

 
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