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Tutorial - Modeling Unified screw threads on bolt in SolidWorks?

Tutorial by Sudhir Gill
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Here is the tutorial.

  1. Step 1:

    Start SolidWorks in part mode.

  2. Step 2:

    Top plane>>Sketch.

  3. Step 3:

    Draw a circle of 20mm dia.

  4. Step 4:

    Extrude it by 50mm.

  5. Step 5:

    Top face>>Sketch.

  6. Step 6:

    Draw a polygon inside a circle of 32.5mm dia.

  7. Step 7:

    Extrude it by 10mm.

  8. Step 8:

    Top face>>sketch.

  9. Step 9:

    Draw a circle tangent to sides of polygon.

  10. Step 10:

    Extruded cut.

  11. Step 11:

    Check flip side to cut. Draft enable at 45.00º.

  12. Step 12:

    Chamfer.

  13. Step 13:

    At distance of 3mm & angle 45º.

  14. Step 14:

    Top plane>>sketch.

  15. Step 15:

    Select the outer edge and then convert entities.

  16. Step 16:

    Curves>>Helix and spiral.

  17. Step 17:

    Defined by Pitch and revolution. Pitch=3mm and revolution = 15.

  18. Step 18:

    Right plane>>sketch.

  19. Step 19:

    Draw a profile like this. Since pitch is 3mm so keep the length be little less than pitch since at 3mm it will have intersection error.

  20. Step 20:

    Sweep cut.

  21. Step 21:

    Select the profile and the helix as the path.

  22. Step 22:

    And we have the unified screw threads.

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