2. Vertical 1. Horizontal Boring In horizontal boring process, the setup can arranged in also of two ways. First setup is one in which work is fixtured to a turning spindle, and tool is attach to cantilevered boring bar that feeds into work. Boring bar in this setup have to be extremely stiff to avoid deflection and vibration through cutting. To achieve high rigidity, boring bars are frequently made of cemented carbide, whose modulus of elasticity approach 620 x lo3 MPa (YO x 106 lb/in2). The next feasible setup is one in which the tool is mount to a boring bar, with boring bar is support and rotate among centers. Work is fastened to a feeding system that feeds it past the tool. This setup can be use to make a boring process on a conventional engine lathe. 2. Vertical Boring Vertical boring machine is use for large, heavy work parts through large diameters; frequently the work part diameter is more than its length. The part is clamp to worktable that rotates relative to machine base. Worktables able to 40 it in diameter are accessible. Typical boring machine can place and feed several cutting tools at the same time. Tools are mounting on tool heads that can be fed horizontally and vertically relative to worktable. One or two heads are mounting on horizontal cross-rail assemble to machine tool housing over the worktable. Cutting tools mount over the work can be use for lacing and boring. In adding to tools on cross-rail, one or two extra tool heads can mount on side columns of housing to enable revolving on outside diameter of work. Tool heads use on vertical boring machine frequently includes turrets to contain several cutting tools. This results in a loss of difference among this machine and a vertical turret lathe. A few machine tool builders create the distinction that the vertical turret lathe is use for work diameters able to 2.5 m (100 in), at the same time as VAM is use for larger diameters. Moreover, vertical boring mills are regularly applied to one-of-a-kind jobs, as vertical turret lathes are use for batch production.