The Ring Machine is a single purpose machine designed to assemble solder rings onto the legs of the return bends. The Ring Machine is a single purpose machine designed to assemble solder rings onto the legs of the return bends. The bends are generally already sized prior to processing in this machine.ModelCopper TubeOD,mmΦ7Φ7.94Φ9.52Wall Thickness,mm0.41, 0.50.41, 0.50.41, 0.5Pitch,mm15.86 ~ 21. ...