CUTTER FOR MINING MACHINES Russian patent published in 2012 - IPC E21C35/19 

FIELD: mining.

SUBSTANCE: cutter for mining machines comprises a holder with an axial conical channel, where a tail is fixed of a cutting tip formed by two closed symmetrically arranged fixators with a conical working part and spherical seats at contacting surfaces for hard-alloy elements, the diameter of which increases in direction from the top towards the tail. The cutter is equipped with an additional holder in the form of a conical rod rigidly connected to a tail of the cutting tip, and hard-alloy elements and fixators are arranged with axial through conical channels, where the additional holder is installed. The additional holder may be made of a material with lower hardness and higher tensile strength compared to appropriate parameters of hard-alloy elements.

EFFECT: reduced hard alloy consumption, higher efficiency of cutter operation, increased tunnelling and speed of rock breaking.

2 cl, 2 dwg