You need to check the ring in the presence of various mechanical defects such as poor adhesion, cracks, scratches, a variety of injuries. When available it is recommended to eliminate the defects, and then made directly for the increase in diameter of the ring.
Place in the hole working platform, the cone so that the marks on the cone and platform coincide. Set the limiter to the desired size on the working cone. The required size must match the top number on the limiter.
Secure the ring on the working cone on top of it install the copper billet.
Turn the handle of the machine clockwise until the jewelry will not affect the limiter.
Again, repeat the process turning ring. Not recommended originally to increase a ring more than three sizes.
Independently increase the ring is hard enough, so it would be better to consult a professional jeweler. In this case, your favorite ornament will last for a long time.