The single roler bit is composed of a single cone and a lug matched by a bearing.According to different strata and construction requirements, different cutting struclures can be selected; wear resistant carbide are welded and cemented carbide inserts are inserted on the back of the lug.
Den roterende borerig får akslen til at rotere og udøver et positivt tryk, så den roterende borekrone kan ramme, rulle og klippe klippen. Knus klippen for at danne en knusende ringzone, knæk derefter den midterste søjle ved at svinge skaftet og tag den knækkede søjle ud for at danne et hul.