MACHINING Copyright Goodheart-Willcox Co., Inc. Chapter 26 Milling Machines 477 26. Accurate holes may be machined on a vertical milling machine with the aid of a(n) ______ _ _ head. 27. List three ways of machining a bevel, chamfer, or taper on a vertical milling machine. 28. Blind or closed keyways are made with a(n) ______ end mill. 29. Name at least one industry that commonly uses high-velocity CNC machines for milling purposes. 30. Use the correct size ______ device for each job, and make sure the device is mounted solidly to the table. Research and Development 1. Social Sciences. The milling machine and its inventor, Eli Whitney, played an important part in early attempts at mass production. Write a term paper on Whitney’s project of producing 10,000 muskets (with interchangeable parts) for the federal government in 1798. Explain how it led to the invention of the milling machine. 2. Language Arts. Take a series of photographs illustrating the safety precautions that must be followed when operating the milling machine. Prepare a slide show or poster for display and present it to the class. 3. Science. Cutting fl uids play an important part in fl any machining operation. Research which cutting fl uids are best to use for aluminum, brass, cast fl iron, carbon steel, and stainless steel. Explain what benefi should be gained with the cutting fits fl uid used for each metal. Present your work to fl the class. 4. Language Arts. Contact a shop that uses milling machines and secure ruined cutters. Make a panel to display them along with an explanation of how they were ruined. Present your work to the class. 5. Language Arts. Demonstrate the proper way to center a cutter to machine a keyway in a shaft. Use the edge fi nder technique. Present your work fi to the class. 6. Technology. Research high-velocity machining and identify at least three applications in which it is used. Present your work to the class.