Masonry Magazine February 2010 Page. 23
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READER SERVICE #274
February 2010 MASONRY 21
The first component of a good diamond wheel is a steel core that is tensioned to ensure that the wheel does not wobble or distort when a load is applied. The next component is the diamonds, which do most of the work, and quality wheels use diamonds of consistent size and shape for better cutting performance and longer tool life. The last component is the bond matrix that hokis the diamonds in place. The bond matrix is made up of different recipes of powdered metals designed for specific types of materi- als. The diamonds are mixed into the bond matrix and then "cooked" under high pressure and high temperature to create the diamond segment in a process called sintering. This segment is attached to the steel core by either brazing, direct sintering or laser welding. Laser welding is the most expensive in terms of manu- facturing but provides the most durable bond between the core and the diamond segment.
How diamond wheels work
KNOWING THE COMPONENTS makes understanding the operation of the wheel much easier. There are exposed dia- monds on the surface of each segment and these diamonds grind away material as the diamond wheel is rotated. As the dia- monds wear away the material, the bond matrix between the dia- monds is also being worn away exposing new diamonds. The diamonds wear down, shatter or are pulled out of the bond
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