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# Tutorial - Modeling Unified screw threads on bolt in SolidWorks?

By Sudhir Gill on 24 Feb 15:26 5 answers 13364 views 0 comments

Tutorial on modeling Unified screw thread on bolt in SolidWorks.

• almost 3 years ago

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.

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.

Sweep cut.

21. ### Step 21

Select the profile and the helix as the path.

22. ### Step 22

And we have the unified screw threads.

• almost 3 years ago

sudhir friend if the thread pitch is 3mm, I know because that curve 1 mm diameter and rather than be a rounding triagulo you applied it. the only thing that I did not understand step 20