DRILLING MACHINES GENERAL INFORMATION

TC 9-524. Chapter 4. DRILLING MACHINES . GENERAL INFORMATION . PURPOSE USES. This chapter contains basic INFORMATION pertaining to DRILLING A DRILLING machine , called a drill press, is used to cut holes MACHINES . A DRILLING machine comes in many shapes and into or through metal, wood, or other materials (Figure 4-1). sizes, from small hand-held power drills to bench mounted DRILLING MACHINES use a DRILLING tool that has cutting edges at and finally floor-mounted models. They can perform its point. This cutting tool is held in the drill press by a chuck operations other than DRILLING , such as countersinking, or Morse taper and is rotated and fed into the work at variable counterboring, reaming, and tapping large or small holes. speeds. DRILLING MACHINES may be used to perform other Because the DRILLING MACHINES can perform all of these operations. They can perform countersinking, boring, operations, this chapter will also cover the types of drill bits, counterboring, spot facing, reaming, and tapping (Figure 4-2).

speed and feed, and provide for coolant to get an acceptable finished product. The size or capacity of the drilling machine ... tipped masonry drills, solid carbide drills, TiN coated drills, parabolic drills and split point drills. Twist drills are classified as straight shank or …

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