The importance of choosing the right diamond blade.
Simply, a diamond blade is a cutting tool with exposed diamond particles captured in a metal matrix (or bond) with a small cutting edge. With a huge variety of diamond saw blades available, and with each blade designed for a specific application, the success of any diamond sawing operation very much depends on selecting the right blade for the job. It is key that the chosen blade is suitable for the material to be cut as selecting the wrong blade can be costly, ineffective and a waste of time and materials.
The quality of diamond blades is determined by many factors including the quality of the diamond itself, the diamond concentration, bond materials, the quality of the steel core and the manufacturing technology used.
Choosing a suitable blade ultimately depends on what material or stone is to be cut and how long and deep the cut is required to be. Depending on these factors, the right blade can be selected with the appropriate diamond toughness, diamond grit (size), diamond concentration, bond hardness and abradability. And it’s not a case of always choosing the highest quality, as choosing a quality blade where a lower quality would suffice is a costly waste.
Depending on the manufacturing process used, diamond blades can be categorised into sintered and welded blades. Sintered diamond blades are normally smaller, with a diameter of less than 400mm, and are normally used on small machines such as table saws and angle grinders, whereas welded diamond blades tend to have a bigger diameter for use on strong power machines.
As a general rule, hard materials blades are designed to cut hard media such as engineering brick and reinforced concrete, and vice versa. In hard blades, the metal bond or matrix which holds the diamond to the body of the tool is relatively soft, as the diamond will blunt quite quickly and it is necessary to keep releasing free diamonds to the edge in order to keep cutting. An abrasive materials blade, however, has a bond which is harder in order to resist premature release of diamonds which are not yet worn out due to the softer nature of the material it is cutting.
If a hard blade is used in a soft material, the matrix will wear very quickly and the blade will not last. Conversely, if an abrasive materials blade is used to cut a hard material, then the diamond will wear out before the hard bond releases new cutting edges, and it will become blunt.
The bottom line is that it is very important to correctly match the core or wheel to the material to be cut. At TIMco, we have a wide range of Addax professional diamond cutting and grinding wheels available for working hard, medium or abrasive construction materials, and are one of the largest producers of diamond superabrasives in the world.
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