Creating a cutom thread

[robertX3LQA]

I am trying to create a custom thread but Fusion is failing. I have read that the recommended way to make a custom thread using a 3d projection of a coil. When using a guided rail, Fusion says it fails to generate valid geometry and nothing else. I tried to use a guiding surface instead, but then the profile is used only for a short bit of the thread and then it stops:

If I try to set the distance to something larger I get:

something sorter...? The file is attached and it is the garden hose thread component that is failing...

Thanks for any help!

[jhackney1972]

Here is a Forum Thread for awhile back discussing and giving the data needed to create a Garden Hose Thread.  Maybe it will help.

[robertX3LQA]

Thanks for the reply. This does unfortunately not solve my problem. It is not the tread I am looking for. I am not sure exactly where this thread I am looking for is coming from, but measuring it, it has a major diameter of 27.3 mm and a pitch of about 1.513 mm and a thread depth of about 1 mm. I tried to make my own thread entry with these values, but I am doing something wrong because Fusion fails when trying to use it. This is my entry:

<?xml version="1.0" encoding="UTF-8"?>
<ThreadType>
<Name>Gardena</Name>
<CustomName>Gardena</CustomName>
<Unit>mm</Unit>
<Angle>60</Angle>
<SortOrder>5</SortOrder>
<ThreadSize>75
<Size>27.3</Size>
<Designation>
<ThreadDesignation>Gardena thread</ThreadDesignation>
<CTD>Gardena thread</CTD>
<TPI>16.8</TPI>
<Thread>
<Gender>external</Gender>
<Class>TBD</Class>
<MajorDia>27.3</MajorDia>
<PitchDia>1.513</PitchDia>
<MinorDia>25.3</MinorDia>
</Thread>
</Designation>
</ThreadSize>
</ThreadType>

Also, my issue with creating the thread using a coil is not resolved.

Thanks for looking into this.

Kind regards,

Robert

[HughesTooling]

@robertX3LQA Try using the Thread maker utility here.

[HughesTooling · Accepted solution]

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@robertX3LQA wrote:

Also, my issue with creating the thread using a coil is not resolved.

Thanks for looking into this.

Kind regards,

Robert

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Using a coil is not the best technique for creating a thread because the coil primitive is not fully parametric. If you really want to use a coil you should not project include the edge but use the actual edge of the coil as it's more accurate.

I've attached a design with a far better way of creating threads\coils. It uses a sweep with twist, just adjust the 3 dimensions in the rectangle. You might want to uncheck the auto update while change sizes. The sketch can break occasionally but should be easy enough to fix.

[HughesTooling]

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@robertX3LQA wrote:

Also, my issue with creating the thread using a coil is not resolved.

Thanks for looking into this.

Kind regards,

Robert

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In your original design all you needed to do was select one of the angled faces of the coil but as you can see the quality of the resulting body is not very good. I think the problem is because you sketched on the end of the coil face so the profile is not perpendicular to the helix angle. I've attached the file.