This post shows how to do Outside Diameter Grooving in Nx CAM. Keep visiting and subscribe my blog for more updates. My YouTube Link: Click Here . Groove cutting on CNC lathes is a multi step machining operation . The term grooving usually applies to a process of forming a narrow cavity of a certain depth, on a cylinder, cone, or a face of the part. The groove shape, or at least a significant part of it, will be in the shape of the cutting tool.