Abstract
This chapter focuses on tool design and the composition of its cutting layer, which plays a key role in the economic machining of materials. Great demands are made on the tool life, its free-cutting ability, the precision of the job, edge quality, and the surface finish. The proper choice of slot geometry and the arrangement of segments give improved tool performance in terms of quality of the cut, noise, abrasive wear, fatigue life of the steel centre, flow of coolant to the cutting zone, and reduced segment wear by abrasion. The fatigue life of the steel centre often becomes a critical consideration in saw blades used under heavy-duty conditions as well as in large diameter blades for stone sawing. The two basic functions of the metallic matrix are to hold the diamond tight and to wear at a rate compatible with the diamond loss. The Diamond Grit Selection focuses on diamond type, grit size, and concentration. The proportion of each diamond particle that performs work is small when compared to the portion which is lost because the matrix is unable to retain it.
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