How to Apply GD&T to FreeCAD Drawing

Apply GD&T

Geometrical Dimensioning and Tolerancing is very important aspect for manufacturing a machine component. there are many benefits of GD&T one off them is it provides clear understanding of the tolerances of a part. In this article we will learn How to Apply GD&T to FreeCAD Drawing. I am going to use a very simple plate to explain how to apply GD&T symbol to that plate as per manufacturing requirement.

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Apply GD&T

First create a simple plate of 100X50X10 and place the view on Drawing as shown in below image. You can choose First Angle or Third Angle as per your requirement.

Place View

How to Make Dimension Basic-:

To make dimension basic Select the Dimension and you find option Theoretically exact option tick mark it you dimension 75 will be Basic as shown in below image.

Make Dimension Basic

Give Symmetrical Tolerance-:

To give symmetrical tolerance in FreeCAD Click on Dimension in property manager select equal tolerance and give value as shown in below image.

Give Symmectrial Tolerance

How to Give Datum-:

To give Datum on FreeCAD drawing Select edge and then Balloon annotation icon as shown in below image.

Insert Ballon

Now a balloon will be get inserted now we will convert this balloon in a datum to do that double click on the balloon in property manager in text field type A. In Bubble symbol select Square and in End Symbol select Filled Triangle as shown in below image.

Insert DAtum

Insert Feature Control Frame-:

To insert Feature Control Frame inset balloon on required face as we did in previous step and then click on ballon and make bubble shape rectangle as shown in below image.

05

Next step is to click on customized For mat label as shown in below image.

Customized Format Lable

Once you click on custom format label you will get GD& T symbol in my case i will select Flatness and give my value 0.02 as shown in below image.

Flatness

Give Unequal Tolerance-:

To give unequal tolerance double click on dimension and uncheck equal tolerance and you will get option to over and under tolerance as shown in below image i have given unequal tolerance to diameter 25.

Give unequal tolerance

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Amar Patel
About Amar Patel 128 Articles
Hi, I am Amar Patel from India. Founder, Author and Administrator of mechnexus.com. I am a Simple Average Man who Loves life and Love living life. Professionally I am a Mechanical Engineer with Solid command over CAD software like FreeCAD, SolidWorks, Autodesk Inventor and AutoCAD Mechanical. I’m here to share my knowledge to help you accomplish your design and engineering tasks quicker and easier. I am Passionate about learning new things especially about Open-Source Software. I love teaching therefore I started my YouTube Channel on FreeCAD and I believe FreeCAD have lots of potential than traditional 3D software. contact me - [email protected]