Abstract: The surface finish of the metal-cutting tool is. Often recommended to betaken as ▽▽▽7-▽▽▽9. For the tool used for extra-fine finishing, its surface finish may be taken as ▽▽▽9-▽▽▽▽11. This paper presents the experimental results & investigations of authors on the influence of the surface finish of the metal-cutting tool on the tool-life the tool-temperature the built-up: edge and the coefficient of contraction of chip. The solution o1; this problem is beneficial for the selection of the. Surface finish of the tool with reasonable tool-life . And the selection of reasonable parameters of the .tool-lip for the finishing operation of metal-cutting.