Machinability of sintered parts is a complex phenomenon influenced by a number of factors, including workpiece and tool properties, cutting conditions, and cutting parameters. A better understanding of the influence of all these parameters on the machinability of sinter-hardened Cu-Ni-Mo based steels is essential. This work uses an output matrix of surface roughness, chip formation, cutting forces, and tool wear to assess the machinability of sintered parts. Cutting speeds of 50, 150, and 250 m/min, feed rates of 0.05, 0.1, and 0.15 mm/rev, and cutting depths of 0.2, 0.4, and 0.6 mm were systematically used as cutting parameters. The results indicated that short spiral chips were formed in all cutting parameters and that the higher feed rates and cutting depth increase the forces and deteriorate surface quality. The increase in cutting speed increases the forces, while linearly decreasing the tool life; however, it has a positive effect on the surface finish.

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