DRILLING BIT ROLLING CUTTER (VERSIONS)

摘要

FIELD: mining. ^ SUBSTANCE: rolling cutter comprises a body with crowns, the peripheral of which is made with a bisected tooth. The section of the bisected peripheral crown arranged at the side of the rolling cutter top is made in the form of a paired disc. At the same time the disc closest to the bit axis is arranged toothed and is reinforced with hard-alloy bits fixed in grooves between teeth, and the second disc - as solid. There is a version to arrange a section of a bisected peripheral crown with zigzag teeth as closest to the rolling cutter top. ^ EFFECT: improved performance of drilling works and their prime cost reduction. ^ 3 cl, 3 dwg