Overview
Carbide burrs are a type of rotary cutting tool used by machinists, fabricators, welders, woodworkers, and manufacturers. The hard metal discs come in various forms and cutting styles, making it possible to finish, deburr, and cut different types of metal with ease. Although it may not always be easy to find the right carbide burr for a particular job, the best carbide burr will always give the best results.
This article contains all the information about ‘Types of carbide burr and cutting styles.’
Carbide Burr Overview
Carbide burrs are cutting tools made of tungsten carbide used to grind, finish, deburr and shape metals. These rotary tools usually attach to die grinders, rotary tools, or pneumatic or electric grinders and operate at high speeds.
Carbide burrs are usually long-lasting and resistant to wear and can cut most materials such as steel, stainless steel, cast iron, aluminum, brass, copper, titanium, wood, plastics and fiberglass. The rotary tools are available in different shapes and sizes and various cutting styles. The table below shows the different types of carbide burrs
Type Description
Ball Burr A cylindrical carbide burr with a rounded end and is mainly used to round edges and enlarge holes
Cylinder Burr A carbide burr with a straight cutting edge and end-cutting style mainly used for surface milling
Tree Burr A carbide burr with a pointed or rounded end, mainly used to deburr inside corners
Flame Burr A carbide burr with a rounded body and point at the end used for blending and carving contours
Oval Burr A carbide burr mainly used to provide curves and radius edges
Cone Burr A carbide burr with a pointed edge used for various applications such as countersinking and deburring
Cut Styles for Carbide Burrs
The phrase ‘cut styles’ refers to the pattern of cutting edges found on carbide burrs. Usually, the cut styles define the applications for which the burr is most suitable. The table below shows the different cut styles for carbide burrs
Cut Style Description
Single cut The cutting edges on single-cut burrs run parallel to each other. These burrs usually provide fast material removal, smooth finish, reduced heat build-up and have good chip control. Mostly used to cut cast iron, steel, and other hard materials
Double cut The cutting edges on double-cut burrs have a more complex pattern than those on single-cut burrs. The intersecting edges on the double-cut burrs create smaller metal chips. This feature provides exceptional operator control, reduces vibrations and chatter, and gives smooth finishes without any defects. The double-cut burrs are the most common type of burrs and are used mainly for metalworking applications
Aluminum cut Aluminum-cut burrs have a more widely spaced pattern than double-cut burrs. This feature enables the burrs to cut metals without getting clogged. Used mainly to cut Aluminum, magnesium, copper, brass, and plastics.
Common Applications of Carbide Burrs
Carbide burrs are versatile tools that can generally be used to grind, cut, deburr, and finish most materials. Some common applications of carbide burrs include
• Weld removal
• Deburring
• Surface grinding
• Porting
• Mold finishing
• Metal fabrication
• Auto body repair
• Aerospace machining
• Wood carving
• Engraving
Carbide burrs can be used in fabrication, machining, and welding. However, in each application, the carbide burrs require different techniques when using. For example, weld removal uses a different technique than deburring. Additionally, certain burr types are better suited to particular materials such as aluminum cut being better in cutting aluminum.
How to Choose the Best Burr?
It is important to choose the best carbide burr for a particular job. Here are some of the best factors to consider when choosing the best carbide burr.
Material
Most materials require specific carbide burr type so as to ensure that the cutting and finishing processes are not hindered. For example, to cut aluminum, one may need to use an aluminum-cut carbide burr, while one may need to use a double-cut carbide burr to cut stainless steel. It is important to choose the best carbide burr type based on the material.
Shape
Carbide burrs come in various shapes and sizes and are used for different applications and materials. Ideally, it is important to choose the best carbide burr shape based on the intended use. For example, a ball burr can be used to enlarge holes, while a cylinder burr can be used for surface milling. However, a flame burr can be used for blending, while a cone burr can be used for countersinking.
Shank Size
The best carbide burr should have a suitable shank size that fits the user’s tool. Ideally, when choosing the best burr, it is important to consider the shank size. Additionally, it is important to always use a carbide burr with the right shank size so as to minimize tool vibrations and ensure there is a perfect fit for the tool in use.
Speed
Generally, carbide burrs can operate at very high speeds, and it is important to ensure that the right speed is used whenever the burrs are in use. It is important to always operate at higher speeds when using carbide burrs because it determines how quickly the burr will remove material from a workpiece. Working at a lower speed than the recommended speed will result in poor finishing, while working at a higher speed than the recommended speed will damage the tool.
Proper Handling and Maintenance of Carbide Burrs
Proper handling and maintenance of carbide burrs are important to ensure that the tool always delivers the best results. Here are some of the proper ways of handling and maintaining carbide burrs
• Always ensure that eye and ear protection are worn when operating the tool.
• Ensure that the workpiece is clamped appropriately before operating the tool
• Avoid forcing the tool; instead, push the tool
• Avoid using excessive pressure and speeds when operating the tool.
• Avoid operating the tool at a lower or higher RPM than the recommended one for a particular burr size
• Always clean the tool after use to ensure it is free from dirt and other foreign materials that might impede the cutting process.
• Always store the tools in a secure place to prevent other tools from damaging the cutting edges
Following the above maintenance and handling guideline will ensure that the carbide burrs always perform excellently.
Indications for Replacing Carbide Burrs
Most of the time, carbide burrs can last a long time before they require replacement. However, there are several indications for replacing a carbide burr, and most of them are related to the ability of the tool to maintain recommended speed, reduce vibration, withstand heat, and provide a good cutting surface. Some of the most common indications for replacing carbide burrs include
• Reduced cutting speeds
• Excessive vibration
• Increased heat generation
• Poor surface finishing
• Poor cutting ability due to chipped cutting edges
Conclusion
Carbide burrs are critical rotary tools used by machinists to finish, deburr, and cut metals with ease. The hard metal discs come in various shapes and cutting styles, making it possible to finish, deburr, and cut different types of metal with ease. Understanding the different types and applications for each carbide burr type is important in choosing the best carbide burr for the intended application. In general, carbide burrs come in various shapes and cutting styles and are used in different applications such as weld removal, metal cutting, and surface grinding of metals and plastics.
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