Extrude with exact measurements I want to build this thing, exactly.



I've created a cylinder and extrude it.



How can I extrude the ring outwards exactly 7mm?
Or Is this the complete wrong way to do this?
place a plane or other object exactly 7mm away from your cylinder
extrude your ring of faces then scale them in the X/Y plane only with Snap to Vertex enabled and snap them to the object created in 1. Make sure the vertex is what's exactly 7mm away from the cylinder.