![](https://i2.wp.com/www.freecad.info/wp-content/uploads/2020/06/Selection_999063.png?fit=900%2C268&ssl=1)
The Subtractive Groove uses a Sketch to remove material from a Body. The selected sketch is rotated around an axis and removes material that it intersects. To complete a successful groove it must intersect some parts of the Body in which it is contained.
If you prefer to watch a video:
Creating a Groove
To create the groove we will re-create the Icon shown in the toolbar. Sans, the colors and the red line in the middle.
Create a New Document, Select Part Design and add Body
![](https://i0.wp.com/www.freecad.info/wp-content/uploads/2020/06/Selection_999067-1.png?resize=108%2C132&ssl=1)
![](https://i0.wp.com/www.freecad.info/wp-content/uploads/2020/06/Selection_999068.png?resize=165%2C67&ssl=1)
![](https://i0.wp.com/www.freecad.info/wp-content/uploads/2020/06/Selection_999069.png?resize=146%2C135&ssl=1)
Select an additive cylinder
![](https://i0.wp.com/www.freecad.info/wp-content/uploads/2020/06/Selection_999070.png?resize=156%2C155&ssl=1)
Pick the XZ-Plane as its attachment
![](https://i0.wp.com/www.freecad.info/wp-content/uploads/2020/06/Selection_999071.png?resize=348%2C229&ssl=1)
![](https://i0.wp.com/www.freecad.info/wp-content/uploads/2020/06/Selection_999072.png?resize=396%2C275&ssl=1)
- Set the Cylinder radius to 10.00 mm
- Set the Height to 25.00
- Set the Angle to 90 Degrees
![](https://i0.wp.com/www.freecad.info/wp-content/uploads/2020/06/Selection_999073-1.png?resize=352%2C172&ssl=1)
![](https://i0.wp.com/www.freecad.info/wp-content/uploads/2020/06/Selection_999074.png?resize=393%2C335&ssl=1)
Click OK to accept the cylinder.
![](https://i0.wp.com/www.freecad.info/wp-content/uploads/2020/06/Selection_999075.png?resize=355%2C207&ssl=1)
- Subtract the middle with a subtractive cylinder
- Select the subtractive cylinder
- Pick the XZ-Plane as its attachment
- Set cylinder radius to 10.00 mm
- Set the height to 25 mm
![](https://i0.wp.com/www.freecad.info/wp-content/uploads/2020/06/Selection_999076-1.png?resize=168%2C156&ssl=1)
![](https://i0.wp.com/www.freecad.info/wp-content/uploads/2020/06/Selection_999077.png?resize=351%2C300&ssl=1)
![](https://i0.wp.com/www.freecad.info/wp-content/uploads/2020/06/Selection_999078.png?resize=119%2C146&ssl=1)
Our basic body is complete:
![](https://i0.wp.com/www.freecad.info/wp-content/uploads/2020/06/Selection_999079.png?resize=345%2C338&ssl=1)
Add a sketch
Attach to XY-Plane
Add a Circle
Constrain the circle radius to 7 mm
![](https://i0.wp.com/www.freecad.info/wp-content/uploads/2020/06/Selection_999080.png?resize=135%2C177&ssl=1)
![](https://i0.wp.com/www.freecad.info/wp-content/uploads/2020/06/Selection_999081.png?resize=337%2C250&ssl=1)
![](https://i0.wp.com/www.freecad.info/wp-content/uploads/2020/06/Selection_999084.png?resize=269%2C221&ssl=1)
Use a Horizontal contraint from the Circle center to the Sketch Origin, set te distance to 20
Use a Horizontal contraint from the Circle center to the Sketch Origin, set te distance to 10
![](https://i0.wp.com/www.freecad.info/wp-content/uploads/2020/06/Selection_999083-1.png?resize=426%2C338&ssl=1)
![](https://i0.wp.com/www.freecad.info/wp-content/uploads/2020/06/Selection_999085.png?resize=357%2C193&ssl=1)
Add the Groove
Select the Sketch in the Model Tree and Select the Create a Groove tool
Select the base Y-Axis as the revolution axis.
![](https://i0.wp.com/www.freecad.info/wp-content/uploads/2020/06/Selection_999086.png?resize=371%2C248&ssl=1)
![](https://i0.wp.com/www.freecad.info/wp-content/uploads/2020/06/Selection_999087.png?resize=144%2C177&ssl=1)
![](https://i0.wp.com/www.freecad.info/wp-content/uploads/2020/06/Selection_999088.png?resize=300%2C224&ssl=1)
The Groove will be added and you can click OK to accept your choice
![](https://i0.wp.com/www.freecad.info/wp-content/uploads/2020/06/Selection_999089.png?resize=451%2C398&ssl=1)