Bull Nose End Mill Tools – Features and Parameters

In milşing applications, we are using different kinds of milling tools. These milling tools have different kinds of advantages over other systems. One of these milling tools is the bull nose end mill application. Here, we explain the general features of these tools that we are using in different kinds of applications.

What is Bull Nose End Mill?

Bull nose end mill.

Also, people call these mills corner radius end mill cutters. If we compare with the conventional square-end milling cutters they have much better tool life and greater productivity in making corners radii at the bottom of a milled shoulder.

Also in mold profiling applications, these systems provide a much better product than the ball end mills.

Important Points About the Bull Nose End Mill Applications

There are different kinds of parameters that we need to consider about these applications.

First of all, they are very good to create rounded-edge square pocketing applications. The 90-degree profile and rounded corners reduced the flute breakage and chipping.

  • Corner Radius: The corner radius is a very important parameter that we need to consider in these applications. The available corner radius values are between 0.008″ to 0.045″. You can find different sizes of them from different sellers.
  • Cutter Diameter: This is the total diameter of the milling tool. In general, the diameters are according to the standards of the holes in the inch system. It is between 1/8″ to 1/2″.
  • Number of Flutes: The effect of the flute number is the level of finish and the rough cuts. If you will make rough cuts, you can use 2 flute cutters. And if you want to obtain much better surface characteristics you can use 3 or 4 flutes.
  • Coating: Also coating on the bull nose end mill applications is another important thing to consider. You can use the uncoated applications in low quantities use on soft materials. But also, TiN-coated bull nose end mill systems are available for serial production in heavy-duty applications. The TiN coating provides very good crossing and abrasion resistance.
  • Material: Both carbide and cobalt steel applications are available. According to the material that you will use, you need to choose one of these materials.
  • Lebntg of Cut: The maximum cutting length is very important for applications.
  • Shank Diameter: The diameter of the shank application that you will use for these applications.
  • Helix Angle: 30 and 35 degrees of helix angles are available.


As you see above, bull end nose mill applications are very common in milling systems. We gave application information about these mills and the parameters that you need to consider about these end mill applications.

If you have additional comments and questions about this topic, please leave them below.

Also, you can find other kinds of useful articles and posts about machining on!

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Uğur Uygun

Hello everyone, I am Uğur. I am a mechanical engineer who has experience in different R&D departments of HVAC companies. With my best friend, I decided to build this website to share out knowledge and experience. And also, I am interested in automotive. So, I am writing about automotive and automotive-related articles here. Sharing my knowledge and experiences on these topics is a very big pleasure for me. I am willing to answer all of the questions people have about these topics.

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