Umfangsfräswendeplatte（14），以可旋转的刀具保持器（12,12A）可通过梯形体被紧固并烧结非零轴向角（a）根据与基本平坦的支撑表面（16）相对的，大致形成 计划前表面（18）和所述侧面之间形成的，并具有至少两个径向相对的切削刃（26）与相关联的夹紧表面，并在此相邻的自由表面（40），所述夹紧每一个在前面槽（28,30）并入的表面和 每个侧表面的自由表面与以锐角直线槽（28,30）形成的，从主体的主导向后端开口角度（b）向所述纵向中心轴线（32）的主体延伸，与后到前 身体的末端朝向稳定增加的深度，凹槽在其长度上 e的横截面具有基本恒定的曲率半径（R 1）。

Umfangsfräswendeplatte (14) under a non-zero axial angle (a) to a rotatable tool holder (12,12a) can be fastened and that of a trapezoidal sintered body is formed, with a substantially flat supporting surface (16) an opposite, substantially plan front surface (18) and formed between these side faces, and with at least two diametrically opposite cutting edges (26) with associated clamping surfaces and in that adjacent flank (40), wherein the clamping surfaces of each one incorporated in the front groove (28,30) and the flank of each side surface are formed, the straight groove (28,30) at an acute, from the leading to the trailing end of the body opening angle (b) to the longitudinal central axis (32) of the body extends, with the lagging to leading end of the body steadily increasing depth, wherein the chamfer has a substantially constant radius of curvature (R₁) has over its length in cross section.