Amorphous SiC has superior tribological properties. These properties must be effective on reduction of adhesion of chip on tool face. In this investigation, newly developed amorphous SiC coated carbide insert was evaluated by turning of aluminium alloy. Film strength became higher on the substrate after which was polished and blasted by abrasive grains than after which was only polished. Adhesion of chip on the coated inserts was less than that on the uncoated ones. Amorphous SiC coated tool showed superior resistance to adhesion comparable with diamond-like carbon (DLC) coated tool. Cutting performance of the insert was almost comparative to that of DLC coated inserts.