Always use a sharp diamond blade.
Diamond blades can become dull when the wrong feeding pressure is used or when cutting certain materials such as heavily reinforced concrete. Working with a dull diamond blade causes overheating, which can result in the diamond segments coming loose.
Diamond blades consist of a steel core provided with segments that contain industrial diamonds.
Diamond blades are ideal for masonry, concrete and other composite materials.
When using diamond blade make sure that it rotates in the direction indicated by the arrow on the blade.