WORKING ELEMENT OF SUBSURFACE

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1. Working member plane of cutting, containing blade in the form of axisymmetrical shaped plate 1, characterized in that line 2 front cutting edge in central front part of blade perpendicular to longitudinal axis of symmetry of 4 working member. And in direction to the ends of plate line cutting edge is with axis of symmetry of acute variable angle Λ, which tends to 90° at the edges of the plate. Cutting edge of working tool has unilateral sharpening, not tochenaya side faces to ground, stochennaya strip blade has layer 0.1-0.3 mm with diffusion nnoi hardness. 2. Working member according to Claim 1, characterized in that the cutting edge 2, 3, 5 forms broken line. 3. Working member according to Claim 1, characterized in that side area 3, 5 of cutting edge have serpoobraznuyu shape. 4. Working member according to Claim 1, 2, 3, characterized in that cutting edge 3, 5 forms a wavy line.