Cut ring specimens to the desired axial length by means
of a knife or razor blade held in the tool post of the lathe. Lay
thin wall tubing flat and cut ring specimens with a die or
cutting mechanism having two parallel blades.15.5 Preparation of Ring Specimens from Tubing —
Place the tubing on a mandrel preferably slightly larger than the inner
diameter of the tubing. Rotate the mandrel and tubing in a lathe.