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Rotary drill rods and tungsten carbide tipped Rotary drill bits for dry drilling principally in coal
This British Standard specifies requirements for rotary drill rods and tungsten carbide tipped rotary drill bits.
These tools are principally for drilling in coal and other minerals, but are applicable to other materials having appropriate drilling characteristics.
Dimensions, one-piece bits including pilot and reamer bits and tungsten carbide tips with appropriate hardness grades.
Materials and slot for bit, pitch of rod, straightness, and interchangeability requirements.
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