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 From: Visual Capitalist The world produced roughly 2.8 billion tons of metal in 2021. This chart represents the metals we mined, visualized on the same scale. This was originally posted on Elements. “If you can’t grow it, you have to mine it” is a famous saying that encapsulates the importance of minerals and metals in the modern world. From every building we enter to every device we use, virtually everything around us contains some amount of metal. The above infographic visualizes all 2.8 billion tonnes of metals mined in 2021 and highlights each metal’s largest end-use using data from the United States Geological Survey (USGS). Technical Article written by Regal Cutting Tools The selection of an appropriate drill point angle for your bit should be informed by questions about your application. Yes—a hole is a hole is a hole—but what is the purpose of the hole, what type of metal are you cutting into, and what are the specifications for the finished hole? In addition to the drill point angle, factors that can affect successful drilling include:
Common Drill AnglesThe most common included angles for drills are 118° and 135°. These angles are an artifact from the time when drilling was largely a manual process, and the drill bits were conventional conical shapes. Over time, tool makers learned that by grinding a conical point with a flat surface (a facet) to create a linear chisel, they could reduce the thrust required and also improve the process of cutting the metal or wood and removing the chips. If you’re drilling by hand, this is a clearly a major benefit. Today, with advanced drilling machines, multi-faceted drill points are the norm. Not only do they require 50% less thrust, but they also generate 60% less heat than a conventional drill point. And there are a number of different configurations, each of which—when combined with a particular drill point angle—is suitable for specific jobs. The general purpose drill points found on most jobber drills are 118° angled drills. They are typically used for cutting into soft metals such as aluminum, whereas the 135° variant is best suited for hardened materials, such as stainless steel. A 135° drill is flatter than 118°, which means that more of its cutting lips engage with the material surface sooner to begin the full metal cutting action. Check out our guide below for what angles are optimal based on the material that is being drilled:  Specialized Drill Point ConfigurationsThere are a number of drill point configurations and these may be found in both 118° and 135° variants. The different configurations are selected based on the drilling application—for example:
There’s an old proverb “A bad workman always blames his tools,” which means that success is not dependent on the tools we use, but how we use them.
In the case of drill points, that may not be 100% true. While you can drill a hole with almost any drill point, the one you use may not be the best for the whole job, whether you are drilling one hole, a hundred holes, or thousands! By choosing the right drill point configuration and included angle, you can receive longer tool life, more precise hole geometry, cleaner breakthrough and improved job productivity. If you have questions about the right drill point for your job, just ask us! |
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