High-speed machining (HSM) is used in industry to improve the productivity and quality of the cutting operations. In this investigation. pure alumina ceramics with the addition of ZrO2. and mixed alumina (Al2O3 + TiC) tools were used in the dry hard turning of AISI 4340 (52 HRC) at different high cutting speeds of 150. https://thegreensjunglebeautyshops.shop/product-category/oil-cleanser/