... can work OD from 15 to 1200mm High effection Vertical ring rolling machineMODEL: D51 Y, D51 QSIZE: 160D, 160E, 250D, ... 250E, 350D, 350E, 400D, 400E, 500E, 630E, 800EChiefly for the bearing,automotive and chemical engineering piping manufacturing, and mainly rolling ... and other parts of circular shapes Material can be steel, stainless steel, aluminum and so on D51Y 250E of Ring rolling Machine