very soft, unstratified, poorly compacted rocks
such as shale clays, clays, poorly compacted clays and
sandstones,
marl limestones, salts, gypsum, hard coals, iron ores.
high penetration rates
are ensured by a considerable offset of cone axis against
the center line of the bit and long sharp teeth. The teeth
are reinforced with hard metal ensuring appropriate durability.
Special shape of teeth in the gage rows designed for respective
types of rock ensures increased penetration rates and
efficient bore-hole cleaning for very soft and viscous
formations.
