... of optimum design theory, into which advanced tech HY128 Ring Spinning Frame is a new type Spinning Frame developed ... according to the spinning requirement.Main Technical Parameter:Spindle gauge (mm)70Spindle number516,504,492,480,456,444,420 ... ,408,396,384,372,360Dia. of ring (mm)38, 42, 45Bobbin length (mm)205, 230Spinnable ... -20000 rpmRoving package (mm)Ø150*400 HY128 Ring Spinning Frame