Click on the X-axis vector to define the axis of the revolution.
Click on the origin of the datum coordinate system to define the axis origin.
Type-in 180 in the End box and click the Reverse Direction button under
the Direction section.
Under the Boolean section, click Boolean > Subtract .
Click OK to create the revolved cutout.
Activate the Revolve command and click on the top face of the part geo-
Draw a sketch and click Finish on the ribbon.
On the ribbon, click Boolean > Unite .
Click on the X-axis to define the axis of rotation and click on the origin to
define the axis origin.