Bur Shapes and Sizes

Bur Shapes

Burs are available in many diverse shapes. Each shape is designed for a specific task. Within each basic shape, such as round, there are other factors that influence the bur type. For example, the number of blades may vary or be closer or further apart, the cut may be single or crosscut, the head may be corrugated, or the bur head may be designed for a specific application such as wax cutting. While the basic shape would stay the same, its use would be different. The diversity of bur shapes offers users great flexibility. A jeweler, for example, might use two or three different shape burs to complete a task.

Because there are so many bur shapes and sizes, standard numbering systems simplify identification and comparison of burs. Each bur is assigned a specific ISO (International Standards Organization) 15-digit number. The number represents each characteristic with five sets of three digits each, as follows:


First three digits = the material the cutting tip is produced from (carbide, diamond, etc.)
Second three digits = the type of shank (right angle, friction grip, etc.)
Third three digits = the head shape (round, inverted cone, etc.)
Fourth three digits = the cut or grit of the head (crosscut, coarse grit, etc.)
Fifth three digits = the head diameter (010, 012, etc.)

Therefore, the bur shape can be easily identified.

Following are links to individual bur shape descriptions:

Bearing Shape Information
Bud Shape Information
Cone Shape Information
Cup Shape Information
Cylinder Shape Information
Disc Shape Information
Flame Shape Information
Inverted Cone Shape Information
Pear Shape Information
Round Shape Information
Stone Setting Shape Information
Taper Shape Information
Torpedo Shape Information
Wheel Shape Information