Transcription of DRILLING MACHINES GENERAL INFORMATION
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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.
special drills that are not considered as twist drills. The standard sizes used in the United States are the wire gage numbered drills, letter drills, fractional drills, and metric drills (See Table 4-1, in Appendix A). Twist drills can also be classified by the diameter and length of …
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