# Tutorial - Modeling Square cut bolt in SolidWorks?

Here is the tutorial.

1. ### Step 1:

Start SolidWorks in Part mode. Top plane>>Sketch.

2. ### Step 2:

Draw a circle of 20mm dia.

3. ### Step 3:

Extrude it by 50mm.

4. ### Step 4:

Top face>>sketch.

5. ### Step 5:

Draw a polygon of 30mm dia circle.

6. ### Step 6:

Extrude it by 10mm.

7. ### Step 7:

Top face>>Sketch.

8. ### Step 8:

Draw a circle tangent to all sides of the polygon.

Extrude cut.

10. ### Step 10:

Flip side to cut at 45.00º draft.

Chamfer.

12. ### Step 12:

Lower edge at 2mm and 45º.

13. ### Step 13:

Bottom face>>Sketch.

14. ### Step 14:

Convert the outer edge.

15. ### Step 15:

Under curves select Helix and spiral.

16. ### Step 16:

Defined by Pitch and Revolution at pitch=3mm and revolution be 13~14.

17. ### Step 17:

Front plane>>Sketch.

18. ### Step 18:

Draw a square of 2mm side.

19. ### Step 19:

Exit the sketch and then sweep cut.

20. ### Step 20:

Select the box as the profile and the helix as the path.

21. ### Step 21:

Click OK and we have the Part.