AutoCAD

How to Use Tan Tan Radius in AutoCAD

Understanding the Tan Tan Radius Tool in AutoCAD

The Tan Tan Radius feature in AutoCAD is essential for creating circles that are tangent to two existing objects while maintaining a specified radius. This method is particularly beneficial in designs that require precise geometrical arrangements, such as in mechanical drawings or architectural layouts. Below is a detailed guide on how to effectively utilize the Tan Tan Radius tool in AutoCAD 2025.

Step-by-Step Instructions for Using the Tan Tan Radius Tool

Step 1: Accessing the Tool

Start by navigating to the Drafting tab at the top of your AutoCAD interface. Within the Draw panel, find the Circle drop-down menu and select the option labeled “Tan, Tan, Radius.” This action will activate the tangent object snap mode, readying the workspace for the next steps.

Step 2: Selecting the First Object

With the tool activated, your cursor will change to indicate it is ready for selection. Click on the first object that you want the circle to be tangent to. This could be a line, arc, or another circle. Ensure you accurately select the edge of the object to create a proper tangent.

Step 3: Selecting the Second Object

Next, select the second object that will also serve as a tangent reference. Similar to the first selection, be precise in clicking the edge of this object. After both objects are selected, AutoCAD will prepare to define the circle’s properties based on your input.

Step 4: Specifying the Circle’s Radius

After selecting the two tangent objects, you will be prompted to enter the radius of your new circle. Input the desired measurement using your keyboard and press Enter. The circle will now be drawn, perfectly tangent to both objects you selected, adhering to the radius specified.

The Importance of Tangent Circles in Design

Tangent circles play a crucial role in various design processes. They ensure smooth transitions between curves, maintain design integrity, and enhance visual aesthetics in drawings. Utilizing the Tan Tan Radius feature efficiently can significantly improve your productivity and precision when working in AutoCAD.

Frequently Asked Questions

What types of objects can be used with the Tan Tan Radius feature?

The Tan Tan Radius tool can be used with lines, arcs, and existing circles. It is essential that the selected objects allow for a tangent relationship, meaning they should touch but not intersect with the circle being created.

Can the radius be adjusted after the circle is created?

Once the circle is created, modifying the radius directly is not possible. However, you can delete the circle and recreate it with a new radius if further adjustments are needed.

Is the Tan Tan Radius tool available in other versions of AutoCAD?

Yes, the Tan Tan Radius feature is available in several versions of AutoCAD, including AutoCAD 2025. Ensure you are familiar with the interface as it may vary slightly between different versions.

About the author

Wei Zhang

Wei Zhang

Wei Zhang is a renowned figure in the CAD (Computer-Aided Design) industry in Canada, with over 30 years of experience spanning his native China and Canada. As the founder of a CAD training center, Wei has been instrumental in shaping the skills of hundreds of technicians and engineers in technical drawing and CAD software applications. He is a certified developer with Autodesk, demonstrating his deep expertise and commitment to staying at the forefront of CAD technology. Wei’s passion for education and technology has not only made him a respected educator but also a key player in advancing CAD methodologies in various engineering sectors. His contributions have significantly impacted the way CAD is taught and applied in the professional world, bridging the gap between traditional drafting techniques and modern digital solutions.