Rock bit is a rock-breaking tool of carving and shearing off, crushing, crushing and shearing off action. In dependence with purpose they can be different by cutting structure type and a number of side cutters, they can have different types of footings: rolling, sliding or combined.

They are effective for drilling of: quartzy sandstones with quartz veins; andesites and basaltic andesites; fine sandstones with veins of argillite, limestone; thin-layer argillites, inhomogeniously silty, coaly with coal veins; thin-layer siltstones, coaly-clayed; silicified limestones and dolomiths; coaly-clayed shales.

They are effective for drilling of: Gray and dark-gray compact clay, limestoned and non-limestoned, with interlaeyrs of sands, siltstones and sandstones, with interlayers of dolomited chalky clay, limestone and sandstone.

They are effective for drilling of: pyrites of weathering layer, shell rocks, quartz-sericitic shale, soft sandy shale, salt rocks, fine-grained gaize, chalky clay, brec, brown iron ore, stone coals.

They are effective for drilling of: argellite-like, sandy, opoka-like clay, foliated argillites, micaceous with interlayers of sandstone, quartz and clay materials, siltstones.

ЭThey are effective for drilling of: alternating of calcic and non-calcic argillites with calcic siltstones and fine, quartz, calcic, carbonated sandstones. Interlayering of fine-grained and even-grained sandstones, thin-layer, quartz, clayed siltstones and compact, thin-layer argillites. Finely-crystalline, clayed limestones. Mottled clay and siltstones with interlayer of limestone. Siltstones, argillites, sandstones of different content with interlayers of sandy dolomites or clayed shales. Organogenic-fragmentary, clayed, dolomited limestone, with inserts of flintstone, with interlayers of dolomites, chalky clays, anhydrites, argillites, sandstones.

They are effective for drilling of: quartzy sandstones with quartz veins; andesites and basaltic andesites; fine-grained sandstones with veins of argillite, limestone; thin-layer argillites, inhomogeniously silty, coaly with coal veins; thin-layer siltstones, coaly-clayed; silicified limestones and dolomiths; coaly-clayed shales.

They are effective for drilling of: alternating of clay, sandstone, sand, siltstone, rarely argillite ant veins of chalky clay. Usually compact dark gray to black and light-green clay. Sandstones of different density. Compact and loose, micaceous, limestoned siltstone.Slightly consolidated, fine-grained, silty sands. Foliated, shaly, limestoned and non-limestoned sands. Sandy chalky clay. Limestone and pelitomorphic mycrocristalline dolomites, shell limestone.

They are effective for drilling of: softly silicified dense limestone, silicified clayed shale, metamorphized shale, arcose sandstone, magnesite.Weathered fractured basils, porphyrite, granodiorite, quartz grounds – albitophires, porphyries.

They are effective for drilling of: Limestone and fine-grained and uneven-grained dolomite, massive, fractured, unevenly clayed and silicious, and often with bird’s eye structure, limestoned dolomites. Alternation of silty clay, siltstone, medium-grained and quartz sandstone, limestoned, thin-layer argillite, crystallined anhydrites, chalky clay, gypsum. Lythic lump salt, with veins of clay, chalky clay, anhydride and dolomite.