Vertical boring machine is for boring automobile engine cylinders, and engine sleeve. The T7220B vertical boring machine is mainly used to bore high accurate holes ... other accurate holes.The T7220C is mainly used for fine boring high accurate holes of cylinder body and engine ... of cylinder. The machine can be used to boring,milling,drilling,reaming. Model T7220B T7220CMax. boring diameterΦ200 mmΦ200 ...