... from manufacturers like, Siemens, Estun. 2. The worktable, upper and bottom die, sliding rail, back gauge, etc. are conducted quenching ... is a two axis DRO that monitors the powered back gauge and the bend depth making this one easy ... location accuracy0.01mmback gauge traveling distance550mmmax working speed of back gauge300mm/srepeat location accuracy of back gauge0.02mmWORKPIECE STRAIGHTNESS0. ...