Page 157 - Demo

155PRE-THREAD DRILLING WITH CHAMFERING %u00bd%u0009Combined DrillsThe most optimal solution for drilling holes with chamfering, or holes with chamfering and counterboring, is with a combined drill. The combined drill is designed for machining several different drilling operations with one drill. Using a combined drill greatly simplifies the processing of holes with chamfering and the processing of more complex holes, including chamfering and counterboring. The most obvious advantages of the combined drill are:%u2022 Increasing productivity - by reducing machine time, i.e., cancelling machine time required to change tools and reducing tool set-up time.%u2022 Reducing required tool stock.%u2022 The ability of drilling a more accurate hole that contains elements such as chamfering or chamfering and counterboring, which is a significant reduction in the coaxial deviations of the various hole elements due to removing axis movements of the table during regular tools exchange inside the machine.The combined drill is a great option that does not change cutting tools but performs operations such as drilling, chamfering, and counterboring with one tool.