... OD from 15 to 1200mm High effection Vertical ring rolling machineMODEL: D51 Y, D51 QSIZE: 160D, 160E, 250D, 250E, 350D, 350E, 400D, 400E, 500E, ... the bearing,automotive and chemical engineering piping manufacturing, and mainly rolling:bearing collars,gear blanks and piping flanges and other parts ... steel, stainless steel, aluminum and so on D51Y 250E of Ring rolling Machine