Round or ball burs are used by dentists, dental lab workers, jewelers, and hobbyists. These versatile burs are spherical in shape and are available in a wide range of diameters. Some round burs feature a collar. Round burs get into tight areas and can be used at any angle. They are made from various materials, including steel, carbide, and high-speed steel, as well as diamonds and sintered diamonds. Round abrasive burs are available in materials such as silicon carbide and high-grade corundum.
The selection of the bur is based on the task to be accomplished and what material is being worked with, whether it is natural enamel, acrylic, or metals such as gold and silver. Round burs are used by dentists for excavating and are popular among jewelers for deburring, enlarging holes, and drilling, as well as for engraving or texturing jewelry. This bur shape is also useful for hobbyists and woodcarvers.
A round bur may be straight/plain cut or cross cut. Cutters may be single cut, double cut, fine cut, double fine cut, or double extra fine cut. The number of blades on the bur heads vary; more blades positioned close together are used for finishing, and less blades spaced further apart are used for cutting materials such as wax that can clog closely-spaced blades. Cutting characteristics are also affected by different flute angles.
Following are links to different types of round shaped burs:
▶ Round Shaped Busch Abrasives
▶ Round Shaped Busch Steel Burs
▶ Round Shaped Busch Carbide Burs
▶ Round Shaped Horico Diamonds Rotary Instruments
▶ Round Shaped Horico Sintered Diamonds
▶ Round Shaped Busch Carbide Oral Surgery Burs
▶ Round Shaped Busch Steel Oral Surgery Burs