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There are different types of bits available for rock drilling, each designed for specific rock formations and drilling conditions. Some common types include roller cone bits, fixed cutter bits, and diamond core bits. Roller cone bits are typically used for softer formations, while fixed cutter bits are more suitable for harder rocks. Diamond core bits, on the other hand, are used for core sampling or drilling in extremely hard formations.

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Coal drill bits come in various types, each tailored to specific geological conditions and drilling needs. The most common types include button bits, tungsten carbide insert (TCI) bits, and steel-to-steel (STT) bits. Button bits, with their carbide buttons on the surface, are ideal for softer rocks and coal seams due to their excellent wear resistance. TCI bits, on the other hand, are more suitable for harder formations due to their tungsten carbide inserts that provide exceptional toughness and wear resistance. STT bits, made entirely of steel, offer a cost-effective solution for less demanding drilling applications.

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