INSERT AND ROTARY CUTTING TOOL Russian patent published in 2014 - IPC B23C5/20 

FIELD: process engineering.

SUBSTANCE: indexing insert has first and second lateral surfaces and peripheral surface extending there between. Peripheral surface has identical peripheral faces, each being divided into two identical first and second cutting sections. Every cutting sections has first and second cutting edges, angular cutting edge extending between said first and second cutting edges, and front surface with flat section that makes the engagement surface. Front surface crosses the first lateral surface over the first cutting edge. Front surface flat section crosses the second lateral surface over exposed edge of front surface. Two cutting sections at every peripheral face are non-coplanar. Every two flat sections of front surface connected with first cutting sections converge along insert axis while cutting edges extend above front surface flat section.

EFFECT: perfected design.

13 cl, 5 dwg