In today’s Manufacturing 101 post, we will discuss step drills and their benefits. Step drills are a type of cutting tool that features multiple-diameter steps in a single tool. They are commonly used to combine multiple hole-making operations.

  • Definition: Step drills are cutting tools that feature multiple steps of increasing diameter. Each step is designed to drill a specific hole size, and they are commonly used in applications that require multiple hole sizes in a single piece of material.
  • Efficiency: One of the biggest benefits of step drills is their efficiency. Because they can drill multiple hole sizes in a single tool, they can reduce the number of tool changes required during a drilling operation. This can save time and increase productivity, especially in high-volume drilling applications.
  • Accuracy: Step drills can also improve drilling accuracy. Because each step is designed to drill a specific hole size, it is easier to control the size and shape of each hole. This can result in more precise and consistent hole sizes, which can be important in many applications.
  • Reduced chatter: Step drills are great for reduced chatter in applications. Chatter is a common issue in drilling operations that can result in poor hole quality and reduced tool life. Step drills can help reduce chatter by gradually increasing the diameter of the hole, rather than abruptly changing sizes. This can result in a smoother and more consistent drilling process, which can improve the overall quality of the drilled holes.
  • Versatility: Step drills are also versatile and can be used to drill a wide range of materials, including metal, plastic, and composite materials. They can also be used in various drilling applications to produce other downhole features like radii and chamfers.


As you now know, step drills have multiple diameters in one tool. They offer several benefits, including increased efficiency, improved accuracy, reduced chatter, and versatility. They are commonly used in drilling applications for metal and other hard materials. 

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