Can anyone tell me please what drawing is this, what it's used for, and how to make and use it in Autocad? Thanks.

Hello teknol, were did you find this drawing ?This drawing doesn't include the necessary dimensions to draw it on AutoCAD.

This is a geometric construction / engineering drawing, specifically it looks like a descriptive geometry layout used to define relationships between shapes (likely a circle inside a rotated square/diamond with projection lines). You’ll often see this in:

Engineering graphics / technical drawing courses


Layout planning for parts or patterns


Understanding projections (VP = Vertical Plane, etc.)


What it’s used for
It’s mainly used to:


Show true shapes and relationships between objects


Help visualize projections and intersections


Guide precise construction before creating a final CAD model


How to make it in AutoCAD
You don’t draw this as a single command, it’s built step by step:


Start with construction lines (XLINE or LINE) for center axes


Draw the main circle (CIRCLE) from the center


Create the outer rotated square (diamond) using POLYGON (4 sides) or lines + rotation


Use OFFSET for parallel lines


Use TRIM / EXTEND to clean intersections


Add construction arcs/circles to find key points


Use layers or linetypes (dashed) for hidden/construction geometry


How it’s “used” in practice
In real CAD work, this type of drawing is more of a planning/understanding tool rather than something you deliver. Once you understand the geometry, you’d typically:


Recreate it as a clean 2D drawing, or


Convert it into a 3D model (extrude, revolve, etc.)