Chapter 12
Touring Some Machining Operations
IN THIS CHAPTER
Getting your drill to run straight and true
Deciding which threading method to use
Turning about and making grooves
Milling deep
Smoothing things over
Concentrate all your thoughts upon the work at hand. The sun’s rays do not burn until brought to a focus.
—ALEXANDER GRAHAM BELL
Many of the machining operations I discuss in this chapter weren’t even possible 50 years ago. And the ones that were possible were done far more slowly and less accurately than they are today. The profiling operations you’ll soon hear about were performed on tracer mills, which is not all that different a concept from the plastic stencils your preschooler uses to trace bugs and flowers. And what couldn’t be traced was often plunged using a mirror image of the desired shape that had been ground into a high-speed steel (HSS) tool bit.
The sheer number of different operations possible on modern equipment has changed as well. What once took multiple ...
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