What is a vertical machine center? Vertical machining occurs on a vertical machining center (VMC), which employs a spindle with a vertical orientation. With a vertically oriented spindle, tools stick straight down from the tool holder, and often cut across the top of a workpiece. What is VMC in machining? Image result for vertical machining centre VMC machining refers to machining operations that utilize vertical machining centers (VMCs), which, as the name suggests, have vertically oriented ma