Exposed surface diamonds score the material, grinding it into a fine powder. Embedded diamonds remain beneath the surface. Exposed diamonds crack or fracture as they cut, breaking down into even smaller pieces. Hard, dense materials cause the diamonds to fracture even faster.
The material also begins to wear away the metal matrix through abrasion. Highly abrasive materials will cause the matrix to wear faster, allowing new layers of diamond exposure to continue cutting. This continuous grinding and wearing process continues until the blade is “worn out”. Sometimes a small, unusable part of the segments or rim may remain.