Add a Concentricity Constraint

Add to the 3D Sketch the Concentricity Constraint to the two part. You can use the cylinder and cone faces, also the straight lines.

1. On the tab, in the Constraints group, click Concentricity.
2. Select the point or the line from the 3D sketch.
3. Select from the 3D sketch the line you add the constraint.
4. Select Confirm.