Page 259 - Demo

257DEEP HOLE DRILLINGISCAR-GUNDRILLS Cutting Conditions for Gun Drilling MethodsThe main elements of cutting conditions for deep drilling are cutting speed and feed. When drilling holes, it is important to select the right cutting conditions in which the tool will work normally, i.e., most efficiently, in order to save the tool from premature wear, taking into account maximum productivity.Recommended initial conditions are shown in the table below, according to insert size, chip breaker form, and workpiece material.When using the small diameter drills, it is crucial to adhere closely to the recommended drilling parameters.