Diamond Core Drill Bit
1.High penetration rate
2.High core recovery ratio
3.Long bit life on working
4.Suitable all rock
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Many years of experience combined with recent improvements in technology and manufacturing concepts have resulted in greatly improved drilling performance of impregnated diamond core drill bits for mineral exploration.
Surface-Set diamond bits are primarily recommended for use in drilling relatively soft, abrasive, unconsolidated formations that are not effectively drilled by impregnated diamond bits. They are also recommended for use in drilling harder formations where the available rotational speeds and bit loads are insufficient to use impregnated diamond bits due to drilling equipment limitations.
Use: Drill soft to hard rock, widely used in all kinds of drillings for prospecting, water and electricity building and construction industry of road, railway, bridge and building taking out core to examine stake, etc.
Structure: They are manufactured with very small, high quality synthetic diamonds mixed evenly through a metal matrix. DIYFIA core bits are manufactured to give optimum penetration rates and bit life, which is required to keep the cost of diamond drilling to minimum.
Hot-pressed Diamond Drill Bit Hardness and Rock Drillability Grades Form |
Rock Drillability Grade | Bit Hardness (HRC) | Rock Classifications |
1~4 | 15°,20°,22°~25° | Silty mudstone, carbonaceous mudstone, siltstone, medium-grained sandstone, through amphibolite, lamprophyre, etc. |
5 | 20°,22°~25°,26°~28° | Silicified siltstone, talc through amphibolite, olive marble, white marble, quartz diorite porphyry, black schist, diopside marble rock, marble and so on. |
6 | 20°,22°~25°,26°~28 | Black hornblende plagioclase gneiss, white plagioclase gneiss, quartz, dolomite marble, black marble, mica, dolomite, alteration angle along glittering rocks, amphibolite granulite, amphibolite, biotite quartz schist, angular rock, garnet diopside skarn, biotite dolomite marble,ect. |
7 | 20°,22°~25°,26°~28 | White plagioclase gneiss, quartz and dolomite marble, diopside petrochemical diorite, mixed carbide powder rocks, biotite hornblende anorthosite, pyroxenite through, dolomite marble, altered quartz diorite porphyry, quartz diorite, quartz biotite schist. |
8 | 30°~32°,33°~35° | Granite, skarn diorite, garnet skarn, quartz diorite porphyry, quartz amphibolite, biotite amphibolite rocks, mixed pegmatite, biotite granite, plagioclase diorite, mixed gneiss, tuff, rock and other mixed light particles. |
9 | 30°~32°,33°~35° | Carbide powder mixed rock, granite, plagioclase rock, mixed diorite, K-feldspar pegmatite, plagioclase migmatites, diorite, quartz diorite, porphyritic granite. |
10 | 30°~32°,33°~35° | Silicified marble rocks, skarn, mixed-plagioclase gneiss, albite porphyry, feldspar pegmatite, amphibolite rocks, felsic migmatitic amphibolite, anorthosite, granite siliceous tuff lava gravel. |
11 | 5°~8°,8°~10°,10°,15°,22°~25° | Tuff, tuff fused quartz chert, dacite, etc. |
12 | 5°~8°,8°~10°,10°,15°,22°~25° | Quartz chert, chalcedony, melting tuff, pure quartzite, etc. |
Information above is for reference only, and Drill bit should be selected accordingly. |
Diamond Core Drill Bit
