Vacuum brazed diamond saws are manufactured by welding synthetic diamond particles to the outside edge of the circular saw blade in a vacuum brazing furnace. All of the diamond particles are on the exterior cutting edge of the blade, with no metal-diamond mixture. Depending on the manufacturer's recommended blade application, vacuum brazed blades will cut a wide variety of material including concrete, masonry, steel, various irons,plastic, tile, wood and glass.

Finer synthetic diamond grits will reduce the chipping of tile and burring of steel and provide a smoother finish. Larger diamond grits will provide a higher cutting speed, but will be more likely to cause chipping, burring, or cracking. Fire departments require blades to be made with a very large diamond grit, to tear through material quickly. An intermediate grit size is used by the production industry.

In this brazing process, people usually use carbon carbon composite sheet, rigid graphite felt board,rayon based graphite felt