The first thing is to pass all the measurements to the given scale.
multiplying these by 2 and then dividing by 5.

The original measurements are crossed out and we write the new ones.

We draw the axis of symmetry.
And on it the measures of 28, 120 and 60 millimeters are taken.
60 is the radius of the circumference of diameter 120.
We draw the two vertical lines of the sketch.
The centers or 1 and 2 will be found at their intersections.
these circles are drawn.

Later we draw the parallels, as shown in the sketch.

We proceed to make an exterior link to a line and a circle.
We measure 28 millimeters to draw a parallel to the horizontal line.
At any angle, a straight line is drawn from or 1.
Externally to this circumference, it is also measured 28 millimeters, and an arc is drawn with this measure and center in o 1.
At the intersection of this arch with the previous parallel, will be the center of the link sought.
From this center a perpendicular to the axis of symmetry is drawn.
we pass with the compass, O 3 to the bottom by axial symmetry, to locate O 4.

We mark the tangent points with the lines.
By joining the centers O 3 and O 4, with O 1, we locate the tangent points between the circles.

We make the links.

To draw the hexagon, we must know that in this polygon the radius is equal to the side, therefore, its radius will be 40 millimeters.
We draw the circumference and with center at the ends of its diameter, draw arcs that will give us the sides of the hexagon.

Check that the side is 40.