| 摘要 |
FIELD: mining.SUBSTANCE: cutter for driving and cleaning and cutting machines comprises a holder with a shank, a reinforcing hard-alloy insert having front and rear faces of sharpening, a cutting edge having a semi-circular convex shape. According to the first embodiment, the front face of sharpening of the reinforcing hard-alloy insert is made of semicircular convex shape, and the rear face - of plane-concave shape. According to the second embodiment, the front and rear faces of sharpening of the reinforcing hard-alloy are made of semicircular biconvex shape.EFFECT: increasing productivity of the working bodies of driving and cleaning and cutting machines, reduced wear of the reinforcing hard-alloy insert of the cutters.5 cl, 10 dwg |
