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8.15 Chapter Conclusion

Micky R. Jennings

Summary

A finished part with multiple different hole features sits on a granite plate; a flat head screw and a socket head cap screw sit in front of the part.
Figure 8.98. A finished part with multiple different hole features sits on a granite plate; a flat head screw and a socket head cap screw sit in front of the part. / Image Credit: Micky R. Jennings, courtesy of Wenatchee Valley College, CC BY 4.0

Drill presses are simple yet effective machines that are capable of so much more than just drilling. From drilling and reaming, to tapping, countersinking, counterboring, and more, drill presses are versatile. The drill press is one of the simplest machine tools in a shop and mastering drill press operations lays the foundation for learning many higher end skills. The knowledge gained from calculating the spindle speed of a twist drill can be built upon to calculate the spindle speed on a lathe. The knowledge gained from using a depth stop can be built upon to cut steps on a milling machine. The drill press is one of the first pieces in the manufacturing puzzle that a machinist must master.

Review Questions

  1. What are some of the hazards a machinist may encounter when operating a drill press and how might they avoid them?
  2. What should be done to a drill press at the end of every shift during use?
  3. List the drill press components and state their purpose.
  4. List and describe a few tool holding and work holding solutions found on a drill press.
  5. List a few cutting tools used on a drill press and describe what makes them unique.
  6. List and describe the purpose of the parts of a twist drill.
  7. Explain how to calculate spindle speed on a drill press.
  8. What happens to the calculated spindle speed when we use tools other than twist drills on a drill press?
  9. How are precision tapers removed and installed on a drill press?
  10. What is a datum and where might they come into play in drill press work?
  11. How would a machinist spot a hole and why would they do it?
  12. Name a hole making process and give a brief account of the steps required to accomplish it.

Attributions

  1. Figure 8.98: Finished holes by Micky R. Jennings, courtesy of Wenatchee Valley College, for WA Open ProfTech, © SBCTC, CC BY 4.0
  2. Video 8.36: Micky R. Jennings, courtesy of Wenatchee Valley College, for WA Open ProfTech, © SBCTC, CC BY 4.0
  3. Video 8.37: Micky R. Jennings, courtesy of Wenatchee Valley College, for WA Open ProfTech, © SBCTC, CC BY 4.0

License

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Introduction to Machining Copyright © by SBCTC is licensed under a Creative Commons Attribution 4.0 International License, except where otherwise noted.

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