Prolonging the service life of diamond blades can not only reduce the user’s costs, but also let the resources be used fully. There are 3 cutting parameters which impact the blades’ life to a fairly big extent:

Line Speed of Saw Blades: In practice, the line speed of diamond blades is limited by equipment conditions and the quality of blades. However, to get the best service life and cutting efficiency, the user should also consider the different natures of the different stones to be sawed when choosing the line speed. In granite sawing, the line speed can normally be set within the range of 25m-35m/s. For the granite of high-content of quartz and therefore difficult for sawing, the lower limit of the line speed range is appropriate. In the production of granite tiles, as the smaller diameter of diamond blades are used, the line speed can reach 35m/s.

Cutting Depth: Cutting depth is an important parameter related to the wear of diamond, effectively cutting, the pressure situation of blades, and the nature of the stone to be sawed. In general, when a high line speed is selected, the user should choose a small cutting depth. By current technologies, cutting depth can normally be chosen between 1mm-10mm. When large-diameter blades are usually adopted to saw the raw materials of granite, cutting depth can be controlled within 1mm-2mm, and at the same time the feed speed should be reduced.

When the line speed is low, generally a big cutting depth should be chosen to improve the cutting efficiency, but the cutting depth must be permitted by the performance of the machine and the strength of blades. Moreover, when there are requirements for the granite surface, a small cutting depth should be employed.

Feed Speed: Feed speed here means the speed of feed of the stone to be sawed. It impacts cutting efficiency, the pressure on blade, as well as the cooling of the cutting area. Its value should be chosen according to the nature of the stone to be sawed. In general, when sawing soft stone such as marble, the user can increase the cutting depth and decrease the feed speed. This will improve the cutting efficiency. When cutting a kind of granite which is of fine structure and is relatively homogeneous, the user can appropriately increase the feed speed. If the feed speed is too low, the cutting edge of diamonds will be easily removed. However, when cutting another kind of granite which is of coarse-grained structure and uneven hardness, the user should decrease the feed speed, otherwise there will be the blade’s vibrations which will lead to the fragmentation of diamonds, and the cutting efficiency will then be decreased. The feed speed for cutting granite is normally selected in the range of 9m-12m/min.