An experimental study was carried out to quantitatively evaluate the forces acting on the diamond grits during the sawing of granite with a circular diamond saw-blade. Measurements were made of the cutting forces and power in both down-cutting and up-cutting modes over a wide range of operating conditions. The mean normal and tangential force components (f_n and f_t) acting on single active diamond grain were subsequently calculated. It was found that the feed rate (v_f) ranked first in governing f_n and f_t relative to the depth of cut (a_p) in either down or up cutting mode. The conclusions presented in this paper can serve as a useful guideline for the selection of optimal machining parameters in circular sawing of granites.
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