Unlock the Secrets of End Mill Bit Size Chart

Navigating the world of end mills can be overwhelming, especially when it comes to choosing the right bit size for your project. That’s why we’ve created a comprehensive end mill bit sizes chart, covering everything from 1/64″ to 1″. With this guide, you’ll be equipped to select the perfect size and type of end mill for your next project, ensuring a flawless finish every time. Let’s dive in and simplify the process of choosing the right end mill bit size for you!

End Mill Bit Size Chart:


What are End Mill Bits?

End mill bits are a type of cutting tool that is used to remove material from a workpiece. They are commonly used in milling applications, where they can be used to create a wide variety of shapes and designs. End mill bits come in many different sizes, with each size offering unique cutting capabilities.

If you’re not sure which size to use, consulting an end mill bit size chart can be very helpful. These charts show you the different sizes that are available and provide information on the type of cutting that each size is best suited for. When choosing an end mill bit, it’s important to consider the material that you will be cutting, the depth of the cut, and the desired finish.

By carefully selecting the right end mill bit for your application, you can achieve precise and accurate results that will meet your needs and expectations. So, whether you’re a professional machinist or a DIY enthusiast, taking the time to choose the right end mill bit will pay off in the quality of your finished product.

High-Speed Steel and Carbide End Mills

End mill bits are an essential tool used in machining, which is used to remove metal from a workpiece. It is a cutting tool that has a spinning cutting surface, and its shape depends on the material it’s designed to cut. The most common end mill bits are made of high-speed steel or carbide.

High-speed steel end mills are the most widely used because they’re tough and the most affordable. However, when a higher quality finish is required, carbide end mills are the better choice. They are more expensive, but they’re more durable and can withstand higher operating temperatures.

One of the main advantages of end mills is their versatility as they come in many different shapes and sizes depending on the application. This enables them to be used for a variety of different tasks, such as rough cutting, profiling, drilling, and finishing. The most common types of end mills are flat-end mills, ball-nose end mills, square-end mills, corner radius end mills, and tapered end mills.

It’s crucial to choose the right end mill for the job, as the wrong one can result in poor quality work or even damage to the workpiece or the end mill itself. Before selecting an end mill, it’s important to consider the material being machined, the desired finish, the depth of cut, and the size of the workpiece. In conclusion, end mills are a necessary tool in metalworking, providing accuracy and efficiency in cutting operations.

Whether you choose a high-speed steel end mill or a carbide end mill, it’s important to select the right one for the job. Paying attention to the material being machined, the desired finish and the workpiece size will help you make an informed decision.

end mill bit size chart

Shank Diameter and Cutting Diameter

End mill bits are cutting tools used in milling applications to remove excess material in a precise manner. They consist of a shank and a cutting diameter, each with specific measurements. The shank diameter refers to the width of the end mill bit that is held by the tool holder, while the cutting diameter is the width of the cutting edge.

It’s vital to choose the correctly sized end mill bit for your project to achieve the desired result. A larger shank diameter gives more rigidity and reduces deflection while cutting, resulting in less vibration and better accuracy. On the other hand, a larger cutting diameter provides deeper cuts, but a smaller cutting diameter allows for a cleaner and more precise cut.

End mill bits come in various types and materials, including high-speed steel, cobalt steel, and carbide, each with different properties that make them suitable for different types of materials. Understanding the shank diameter and cutting diameter of end mill bits is essential in choosing the right tool for the job.

End Mill Bit Size Chart

An end mill bit size chart is an essential tool for any machinist or DIY enthusiast looking to engage in precision cutting. The chart lists the various sizes of end mills, ranging from 1/16″ to 1″, and their corresponding measurements. For instance, the 1/16″ end mill has a shank diameter of 1/8″ and a cutting diameter of 1/16″.

Understanding the chart is crucial as it helps one determine the best bit size to employ when cutting through materials such as metal, plastic, or wood. Using the right bit size eliminates the risk of damage to the cutting tool or the material being cut, leading to a successful project. The chart also provides information on the number of flutes, helix angles, and other specifications that one should consider when selecting an end mill bit for their project.

So, if you’re planning to engage in cutting tasks, get your hands on an end mill bit size chart, and get started on your project with confidence and accuracy.

Standard Size Chart

End mill bits are a crucial part of any milling machine, and it’s essential to use the right size to get the job done accurately. The end mill bit size chart is a helpful reference that shows the standard sizes available for most milling applications. The charts usually have two columns with the bit diameter listed in inches or millimeters, and the other column provides the equivalent in fractions or decimals.

It’s worth noting that different manufacturers may have slightly different sizes, so it’s always best to double-check before making a purchase. While using the right bit size is essential, it’s also important to consider the material being milled. Harder materials may require a smaller bit to ensure clean cuts, whereas softer materials may be more forgiving.

Keeping these factors in mind can help ensure smooth and accurate milling operations no matter the application.

Metric sizes chart

If you’re a metalworker, you know that end mill bits are crucial tools in your arsenal. However, with so many different sizes available, it can be tough to know which bit to use for each job. That’s where a metric end mill bit size chart comes in handy.

This handy chart lists all the different sizes of end mill bits, from the smallest to the largest. With this chart, you can easily compare different sizes and find the perfect bit for your needs. Whether you’re creating intricate designs or just need to remove material quickly, there’s a size on the chart that’s perfect for you.

Plus, using the correct size bit ensures that you’ll achieve the best possible results. So next time you’re in your workshop, be sure to consult your end mill bit size chart to get the job done right.

Factors to Consider

When it comes to selecting an end mill bit size, there are quite a few factors to consider. Firstly, you need to identify the material that you will be cutting and what type of machine you are using. This will impact the size, length, and number of flutes that you need.

Secondly, the depth of your cuts and the size of your workpiece will also be factors that determine the end mill bit size required. Lastly, you need to consider the overall precision and accuracy needed for your project. The end mill bit size chart is a handy tool that can help you determine the right size bit for your application.

It lists the various sizes available and the recommended materials and machines that they are suitable for. Ultimately, selecting the right end mill bit size will not only help you achieve accurate results but also prolong the life of your cutting tools.

Material Being Machined

When it comes to machining, one of the key factors that must be considered is the material being machined. Different materials have unique properties that can affect the machining process and the final product. For example, metals are generally harder than plastics, which can make them more difficult and time-consuming to machine.

Other materials, such as composites or ceramics, may require specialized tools and machines to achieve the desired result. Additionally, the material may also impact the cost of the machining process, as some materials may be more expensive than others. It’s important to carefully consider the material being machined and to select the appropriate tools and processes for the job at hand to ensure a successful outcome.

By doing so, you can achieve the desired precision and quality while also maximizing efficiency and minimizing costs.

Machine Power and Rigidity

When choosing a machine for your project, one key factor to consider is its power and rigidity. The machine’s ability to withstand heavy workload, vibrations, and pressure plays a vital role in delivering accurate and consistent results. It is important to understand the relationship between power and rigidity and how they influence the machine’s performance.

High power alone is not enough if the machine lacks rigidity because it will lead to chatter, poor surface finish, and reduced accuracy. Similarly, high rigidity without sufficient power will lead to low material removal rates and longer machining times. Finding the perfect balance between power and rigidity will ultimately determine the success of your machining project.

Overall, it’s important to prioritize both power and rigidity when selecting a machine to ensure optimal results.

Depth and Width of Cut

When it comes to woodcutting or metalworking, the depth and width of cut are two crucial factors that cannot be overlooked. While some may think that a deeper cut always results in a better outcome, that’s not necessarily the case. Depth and width play a significant role in determining the quality and precision of the result.

If the cut is too wide or deep, it could lead to waste of the material or even cause the machine to malfunction. On the other hand, if the cut is too shallow or narrow, it may not provide the desired result, leading to a waste of time and labor. Therefore, it’s essential to consider the material’s properties, the machine’s capabilities, and the project’s requirements before deciding the depth and width of the cut.

By doing so, you can ensure a successful outcome that meets all the necessary specifications.


In conclusion, choosing the right end mill bit size is a bit like dating. You want to find the perfect fit – not too big, not too small, but just right. And just like with dating, trial and error may be necessary before finding the ideal match.

So don’t be afraid to experiment and try out different sizes to achieve the best results in your machining endeavors. Happy milling!”


What is an end mill bit size chart?
An end mill bit size chart is a chart that displays the different sizes of end mill bits, typically in diameter, and their corresponding measurements in metric and/or imperial units.

How do I choose the right end mill bit size for my project?
The right end mill bit size depends on the material you are working with, the type of cut you are making, and the desired outcome. Consult the end mill bit size chart and consider the factors mentioned to make an informed decision.

Can I use a smaller end mill bit than recommended?
Using a smaller end mill bit than recommended may be possible, but it can result in slower cutting times, lower material removal rates, and reduced tool life. Additionally, considering the cost of end mills, it may not be a cost-effective solution in the long run.

Can I use a larger end mill bit than recommended?
Using a larger end mill bit than recommended can cause issues like chatter, poor surface finish quality, and the potential to break the tool. It’s best to stick to the recommended end mill bit size for optimal results.

Leave a Comment