This study systematically examines the wear performance and machining efficiency of vacuum-brazed diamond-coated milling tools under optimized processing conditions. Two widely used metamorphic-origin marbles, Muğla White (MW) and Uşak White (UW), were selected as workpieces. The experimental methodology involved milling operations on a CNC machining center, where spindle speed (6000–12000 rpm), feed rate (1500–3000 mm/min), and a constant depth of cut (1 mm) were selected as the key input process parameters. Machining performance was evaluated through surface roughness (Ra), cutting force (Fr), specific energy consumption (SE), and material removal rate (MRR), while wear mechanisms were characterized using Scanning Electron Microscopy (SEM) and digital microscopy on machined areas of 1 to 7 m 2 . Optimization analysis determined the ideal processing conditions to be 6000 rpm and 2281 mm/min for MW, and 12000 rpm and 3000 mm/min for UW, which were subsequently confirmed by validation experiments. Comparative findings indicated that the lower mechanical strength of MW marble resulted in greater material removal but increased tool wear (54%) compared to UW (47%). These results highlight the decisive influence of microstructural characteristics and operating parameters on tool wear, thereby contributing to the industry by offering guidelines for extending tool lifecycle and enhancing energy efficiency.
Öz et al. (Tue,) studied this question.