Segment Cracking
There are two types of segment cracking, vertical cracks perpendicular to the blade center and horizontal cracks parallel to the weld.
Vertical cracks are typically caused by using a bond that is too hard for the material being cut. As the diamonds become dull the blade will pound leading to cracked segments.
Horizontal cracks can be caused by several different reasons. If a wet cutting blade overheats it can lead to a weld failure. If the blade twists it can jam in the cut and crack the segment. If there is a defect in the pad, the diamond bearing area of the segment can break free.
Blades with cracked segments should be returned to the manufacturer for evaluation and repair.