How to use carbide rotary burr?

Published On: July 15, 2020

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Here are the main points of the article:

What are the different types of carbide rotary burrs and how to use them?

What speed should you use your carbide rotary burrs?

What are the tips for using the carbide rotary burrs?

What are the different types of carbide rotary burrs and how to use them?

Choosing to use the different types of carbide rotary burrs depends on the specific uses. There are the following types of carbide rotary burrs and how to use them is also stated below:

Carbide rotary ball burrs: Many wood carvers, stone carvers, and metal carvers use these carbide rotary ball burrs to carve burrs on amateur drills, micromotors, or high-speed handpieces. These small carbide rotary burrs are of a diameter of 0.5mm and are ideal for complex engraving projects.

  • Carbide tree burrs: these burrs are used for rounded corners and concave cuts. They can also use sharp ends to cut in hard-to-reach areas and at sharp angles.
  • Carbide inverted cone burrs: V cutting and back chamfering can be done with tungsten carbide inverted cone burr.

What speed should you use your carbide rotary burrs?

The speed at which you use your carbide drill in your rotary tool will depend on the material and profile you are using to be produced, but it is safe to say that you do not need to exceed 35,000 RPM speeds. The following table shows some approximate speeds. If the carbide rotary burrs come off easily, it may be due to too little speed. However, it is ideal to start the drill slowly and increase the speed as you go. High speed will prevent clogging of your thorn flute.

Diameter of BurrRPM
1.6mm or 1/16″25,000 – 35,000
2.35mm or 3/32″17,000 – 26,000
3mm or 1/8″17,000 – 26,000
6mm or 1/4″11,000 – 16,500
12mm or 1/2″8,000 – 12,000
16mm or 5/8″7,650 – 11,500

What are the tips for using the carbide rotary burrs?

As with all drills and burrs, let the carbide rotary burrs do their work and apply only a little pressure, otherwise, the cutting edge of the flute will chip off or become too smooth, reducing your carbide rotary burr life.

Carbide rotary burrs are made by a special selection of cemented carbide. Due to its extremely high hardness, tungsten carbide can be used for more demanding work than high-speed steel. Carbide rotary burrs also perform better than HSS at higher temperatures, so you can make them run hotter and last longer. HSS burrs begin to soften at high temperatures, so carbides are a better choice for long-term performance.

When using carbide rotary burrs, try not to let them stand for too long as this prevents burrs from sticking into the material, causing unsightly marks and roughness.

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