The machined surface quality during turning is influenced by the type and geometry of cutting tool used and the selected technological machining parameters, as well as the presence of cutting fluid. The choice of the cutting insert type depends on the machined material and turning operation performed. The contribution compares two carbide-coated cutting inserts types, VCGT and VCMT, for turning AlSi 304 stainless steel. The comparison is performed with respecting the machined surface roughness when using variable cutting conditions. Simultaneously, the influence of the cutting fluid usage on the machined surface roughness is also investigated. Based on the results presented in the contribution, it is demonstrated that in the cutting conditions selected range in the production of a specific component, the values of the machined surface roughness after using VCMT cutting insert show better values. Simultaneously, it is found that in the cutting conditions selected range, the VCGT cutting inserts are prone to sudden brittle fractures, which limits their use in automated turning centers and systems.
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