SLIDING BEARING OF ROLLER CUTTING TOOL Russian patent published in 2009 - IPC E21B10/22 

FIELD: mining.

SUBSTANCE: invention refers to bearing of rock destruction tool applied in mining industry. The given sliding bearing consists of a journal and a roller cutter, contacting surfaces of which are reinforced with hard alloy insertions located with set off along circumference on neighbour rows. Hard alloy insertions are arranged at least in three rows; also end rows of hard alloy insertions are located in one plane parallel to axis of the journal. Notably, one of rows of hard alloy insertions located between the end rows is made either in sinusoid, or in zigzag shape, or with alternate width in plane; also contacting surfaces of hard alloy insertions of internal and external rows have congruent shape.

EFFECT: increased functionality of bearing.

4 dwg