Carbide burrs have extensive use in metal works, modeling, and precision engineering. Therefore, they are critical for numerous industries. And the horizon of their application is very vast. It includes manufacturing spaces like aerospace, automotive, dentistry, and metal sculpting.
In comparison, End mills are also similar tools used for cutting, metal chipping, and removing material. The End Mills work with heavy milling machines like CNC, which are automated, have separate software that guides their toolpath. While now, mini end mill machines like tabletop cutters and CNC routers are also making their way into the market.
Many customers ask queries about both the carbide burrs and end mills. They cannot figure out the core differences between these two unique tools.
That’s why we are creating a separate post that will point out all significant differences between the two.
What Are Carbide Burrs and End Mills?
Before we start making comparisons, it would be better to understand the meaning of carbide burrs and end mills.
Carbide Burrs
Carbide burrs do not need heavy CNC machines to operate. They do an excellent job of milling, deburring, and cleaning even with air tools like Die grinders and high-speed rotary tools.
The carbide burrs can operate at different speeds depending upon the diameter of the burr to achieve the desired result.
For example, a carbide burr with a diameter of 2.35 mm should operate at 17000-25000 rounds per minute. Moreover, carbide burrs are available in different shapes and sizes. Specific industries have a particular preference for burrs.
End Mills
Milling is an old-fashioned industrial process used to remove materials from metals. The inception of milling machines dates back to the early 18th century. But the process of end milling is relatively new. Away from conventional milling techniques, the end mills have cutting edges on the sides or ends.
End milling cutters work on CNC machines. And they are used for the processes like profile milling and face milling. Like carbide burrs, end mills are also available in different diameters, shaft sizes, and flutes.
Top 5 Differences Between Carbide Burrs and End Mills
#1. Categorization
Carbide burrs come with two types of cuts: single cut and double-cut. If you want in-depth information in this regard, we have already created a post on Single cut vs. double cut carbide burrs. Burrs designed for single cut have one up-cut spiral flute. One flute carbide burr suits ferrous metals, including mild steel, carbon steel, stainless steel, cast iron, and hardened steel.
Also, it’s convenient for removing materials from metals like copper. Double cut carbide burrs work on both ferrous as well as non-ferrous metals. Carbide burrs can easily remove material from non-ferrous metal like aluminum also non-metals like wood and plastic. They are more effective on non-metals because of sharper cutting edges. Also, they have two cutting edges or flutes.
With the broader categorization of end mills, you get two types: center-cutting and non-center cutting end mills. Centre cutting end mills are suitable for plunging as they have vertical flutes. At the same time, non-center cutting mills are for horizontal cutting.
Furthermore, the categorization of ends mills continues with many other variables such as the number of flutes and the helix angle from the base. For example, straight flute end mills use basic flutes and have helix at zero degrees.
#2. Tool Material
The material used for making carbide burrs is more or less self-explanatory. Very high-quality tungsten carbide forms the core of carbide burrs. Tungsten is a solid, tough substance; burrs made of it can efficiently operate in very high temperatures without any breakage. Unfortunately, this is the domain where High-speed steel struggles badly; you can’t use them at higher temperatures for very long.
Two materials stand out when you talk about the formation of end mills; the first is solid carbide, and the second one is alloys of cobalt steel. The cobalt steel alloys are also popular as high-speed steel. The HSS we mentioned in the case of carbide burrs. The end mills made for solid carbide offer great tool life without compromising with cutting performance. In comparison, HSS provides a good balance of solidity and wear resistance. Therefore, they are suitable for high-efficiency chipping.
#3. Types and Applications
We discussed the broader classification of carbide burrs in the form of double cut and single cut burrs. And how they are employed. But when you use them for processes like deburring, cleaning, chipping, and finishing, you have to look beyond just types.
Now you will also have to consider the profiles of tungsten carbide burrs. You can decide the shape of burrs by looking at the potential cut. For example, spherical-shaped or ball-shaped carbide burrs work best to create concave cuts. That’s when the diameter of the burr comes into play. The same type is available with different diameters, which usually range from 0.5mm to 3mm.
For deeper cuts, you will have to use bigger diameters. There are burrs with a tree shape, inverted cone shape, pointed cone, and round nose. They make cuts according to their profiles. Professionals and industries choose diameters aligning with their objectives.
When you come to end mills, there is no lack of diversity here too. You get up and down cut end mills, which are the most popular of the lot as they have a wide range of applications. These mills are spiral-shaped. They have two running spirals. The up-cut spiral gives a rough cut, and a down-cut ring gives a finishing touch. Just like burrs, you can also get custom shape end mills. These are ball-nose end mills, V-bit end mills, and roughing end mills.
#4. Durability
When it comes to the durability of carbide burrs, a lot depends on the shaft and the load you put on them. A carbide tungsten burr with a shaft size of 1/4 will give you maximum durability. Whereas, if you take carbide burrs with 1/8 shank size, they will have relatively lesser durability.
The advantage of carbide is that you can change heads as long as your shaft is good enough to use. For example, with 1/4 carbide burr, you can change about 20 burr heads.
The durability of end mills is very relative. It depends on where you employ them. As most end mills use HSS, they don’t show too much resistance to heat. So while in ordinary temperature, end mills can last a lot longer.
#5. Adaptability to Mini Handheld Tools
Carbide burrs are exclusively made for air tools, rotary tools, and die grinders. There is already a massive market for these handheld tools. You can choose and operate the tungsten carbide burrs with a device that gives more access and control.
The end mill industry is also now moving towards CNC routers. But, again, it is because the routers are very affordable compared to software-run CNC machines. Also, as we mentioned earlier, tabletop and other handheld devices for end mills are now coming into the market. But they will still take time to become part of the mainstream. So at present, end mills are mostly a CNC tool.
What Are Flutes in Carbide Burrs and End Mills?
Flutes are nothing but the cutting edges of the tool. They have a spiral shape and robust sharpness.
When rotary tools are in motion, flutes work as a passway for the chips.
Carbide burrs are primarily available in 1 and 2 flutes. Likewise, each bit of an end mill can have up to 2, 3, and even 4 flutes.
Carbide Burr vs. End Mill - Which Is Better?
Both end mills and carbide tungsten burrs offer a broad portfolio of tools.
Both are effective cutters and millers and equally effective in the processes like deburring and finishing.
The two-flute end mills are one of the best tools to make carvings on wood.
While carbide burrs are emerging as a very efficient alternative to other tools, they are more robust and affordable. Also, their ability to adjust with air tools makes them even more effective. Though, both offer different value propositions. But in comparative analysis, tungsten carbide burrs have a clear edge over end mills.
Final Thoughts!
There is the only thing that differentiates our species from other mammals that we have access to tools. And we know how to use them to our advantage. Mold making/precision engineering industry started flourishing in the early eighteenth century. And we never looked back from there.
The advent of CNC machines was a breakthrough. The tools like end mills created magic with CNC machines with guided tools.
But now, tools like tungsten carbide burrs form the same magic wave with less complexity and high precision. So, if you seek to avail the benefits offered by carbide burrs, make sure you get them from a genuine carbide burr manufacturer.
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