Enhanced-Double-Rib-PDC-Core-Drill-Bit-for-Coal-Mining---Thickened-Ball-Pieces
Enhanced-Double-Rib-PDC-Core-Drill-Bit-for-Coal-Mining---Thickened-Ball-Pieces
Enhanced-Double-Rib-PDC-Core-Drill-Bit-for-Coal-Mining---Thickened-Ball-Pieces
Enhanced-Double-Rib-PDC-Core-Drill-Bit-for-Coal-Mining---Thickened-Ball-Pieces
Enhanced-Double-Rib-PDC-Core-Drill-Bit-for-Coal-Mining---Thickened-Ball-Pieces
Enhanced-Double-Rib-PDC-Core-Drill-Bit-for-Coal-Mining---Thickened-Ball-Pieces
Enhanced-Double-Rib-PDC-Core-Drill-Bit-for-Coal-Mining---Thickened-Ball-Pieces
Enhanced-Double-Rib-PDC-Core-Drill-Bit-for-Coal-Mining---Thickened-Ball-Pieces
Enhanced-Double-Rib-PDC-Core-Drill-Bit-for-Coal-Mining---Thickened-Ball-Pieces
Enhanced-Double-Rib-PDC-Core-Drill-Bit-for-Coal-Mining---Thickened-Ball-Pieces

Exploración Bits Una Costilla Doble Costilla PDC Broca de Núcleo para Perforación de Minería de Carbón con piezas de bola mejoradas y engrosadas

Adecuado para capas de roca dura de nivel 8-9, como basalto o diabasas, PDC material mejora la resistencia y durabilidad general del trépano.
Número de mueble: 113#

Nuestra artesanía

Diverse product line suitable for various fields.
PDC vacuum welding boosts strength, durability,performance
Integrated forming of tungsten carbide alloy steel
Applications of drill bits in various rock layers and scenarios READ NOW
Model **
Brand FENGSU
Type Drill bit
Material Aolly
Size Range **
Thread Type **
Recommended Formation **
Origin HUNAN，China
Packaging Carton or Wooden Box

Comprehensive Rock Drilling Reference Table

Stratum Classification/Name Representing Rock Strata Theoretical Drilling Speed/Recommended Pull-out Length Recommended Drill Bits
Level 1 (Loose Soil) Secondary loess, secondary Hongshi, soft sand without gravel and angular gravel, diatomaceous earth 15M/h, 15M/P Alloy drill bit, small-tooth composite drill bit, ordinary composite drill bit
Level 2 (Loose Rock) Huangshi/Hongshi/Peaty Clay/Sandy Soil/Kaolin Type 8M/h, 2.4M/P Alloy drill bit, small-tooth composite drill bit, ordinary composite drill bit
Level 3 (Soft Rock) Strongly Weathered Shale/Slate/Grazing Rock/Schist/Slightly Cemented Sand Layer 6M/h, 2M/P Ordinary composite drill bit, triangle composite drill bit, bread-shaped composite drill bit, blade-shaped composite drill bit
Level 4 (Slightly Soft Rock) Shale, sandy shale, oil shale, carbonaceous shale, calcareous shale, sand shale interlayer, argillaceous limestone 5M/h, 1.7M/P Ordinary composite drill bit, triangle composite drill bit, bread-shaped composite drill bit, blade-shaped composite drill bit
Level 5 (Slightly Hard Rock) Gravel and gravel layers, collapse layer muddy slate, sericite chlorite greenstone slate, schist, limestone, marble 3M/h, 11.50M/P Ordinary composite drill bit, triangle composite drill bit, bread-shaped composite drill bit, blade-shaped composite drill bit
Level 6-7 (Medium Hard Rock) Chlorite, mica, slate, Qianmu rock, schist, silicified limestone, calcite 2M/h, 1.3M/P-1.1M/P Blade-shaped composite drill bit, reinforced composite drill bit, helmet-tooth composite drill bit, high-grade electroplated diamond drill bit
Level 8-9 (Hard Rock) Silicified mica rock, gneiss, basalt, diorite, pyroxenite, quartz Anshan porphyry 1.2M/h, 0.3M/P-0.65M/P Thickened composite drill bit, blade-shaped composite drill bit, helmet-tooth composite drill bit, conventional electroplated diamond drill bit, thermally stable polycrystalline diamond (TSP) drill bit
Level 10-11 (Very Hard Rock) Granite, granodiorite, gneiss, rhyolite, quartzite 0.8M/h, 0.5M/P-0.32M/P Body sintered drill bit, low-degree electroplated diamond drill bit, thermally stable polycrystalline diamond (TSP) drill bit.
Level 12 (Extremely Hard Rock) Quartzite, jasper, angle shale, corundum rock, quartz, flint, jasper 0.3M/h, 0.16M/P Body sintered drill bit, low-degree electroplated diamond drill bit, thermally stable polycrystalline diamond (TSP) drill bit.

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