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Recommended Operating Parameters of TCI Tri-Cone Bits for Mining
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Bit Type
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Normal WOB
KN/mm (bit diam.)
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Rotary Speed
RPM
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Cutting Structure
Main Features
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Applicable Formation
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K412
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0.70-1.00
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120-60
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Insert bit, conical spherical compacts in inner row and in outer row.
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Soft with low compressive strength and high drillability, such as shale, soft limestone, soft sandstone, rudaceous clay, soft dolomite, salt bed and coal bed etc.
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K432
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0.70-1.00
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100-60
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Insert bit, conical spherical compacts in inner row and conical spherical or wedge compacts in outer row.
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Soft with low compressive strength and high drillability, such as; shale, soft limestone, sandstone, conglomerate, soft dolomite with stringers and coal bed etc.
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K532
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0.70-1.00
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100-60
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Insert bit, conical spherical compacts in inner row and conical spherical or wedge compacts in outer row.
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Soft formation with low compressive strength, such as; shale, soft limestone, dolomite with stringers and coal bed etc.
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K612
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0.70-1.00
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100-60
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Insert bit, conical spherical compacts in inner row and conical spherical or spherical compacts in outer row.
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Medium hard with high compressive strength and thick and hard stringers, such as; hard shale, limestone, sandstone, dolomite and coal bed, etc.
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K632
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0.80-1.00
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100-60
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Insert bit, conical spherical compacts in inner row and conical spherical or spherical compacts in outer row.
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Medium hard with high compressive strength and high abrasiveness, such as; limestone, sandstone, dolomite and chert etc.
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K732
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0.80-1.00
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90-60
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Insert bit, conical spherical compacts or double round top inserts in inner row, spherical compacts in outer row.
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Hard formation with high compressive strength and high abrasiveness, such as granite, limestone, sandy shale, dolomite and chert, etc.
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K832
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1.10-1.30
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90-60
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Insert bit, double round top inserts or spherical compacts in inner row, spherical compacts in outer row.
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Hard formation with high compressive strength and high abrasiveness, such as magnetic quartzite, quartzite and granite, etc
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*Note: The upper limits of WOB and RPM recommended in the above tables should not be used simultaneously.
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Tri-Cone Rotary Bits - For Mining
