Our carbide drilling inserts adopt tailored carbide substrates and high-performance surface coatings, delivering stable cutting performance across various geological conditions. Below are all rock types our inserts can efficiently drill through:
1. Soft & Weathered Rock
- Weathered mudstone, claystone, shale
- Loose sandstone, argillaceous siltstone
- Soft marl, tuff, decomposed granite Feature: Low abrasion, high plasticity; inserts with sharp cutting edges work best to avoid material clogging.
2. Medium Hard Sedimentary Rock
- Medium-compacted sandstone, limestone, dolomite
- Slightly silty mudstone, calcareous shale
- Coal measure rock, gypsum rock Feature: Moderate abrasiveness; general-grade carbide inserts deliver balanced service life and drilling speed.
3. Hard Abrasive Sedimentary Rock
- Quartz-rich sandstone, siliceous limestone
- Conglomerate, pebbly mudstone Feature: High quartz content causes severe abrasive wear; we recommend ultra-fine grain carbide inserts with anti-wear coating.
4. Igneous Rock
- Medium-hard basalt, diorite, andesite
- Hard granite, rhyolite, porphyry Feature: High compressive strength and brittleness; impact-resistant carbide substrates prevent insert chipping under heavy drilling load.
5. Metamorphic Rock
- Slate, phyllite, marble
- Hard quartzite, gneiss, schist Quartzite is extremely abrasive, requiring coated high-hardness carbide grades.
6. Mixed Complex Formations
Alternating layers of soft clay + hard gravel, interbedded sandstone and granite, fractured broken rock mass. Our multi-purpose carbide inserts handle frequent formation transitions without frequent replacement.
If you work with special complex rock formations or require customized hardness and coating solutions for extreme drilling conditions, feel free to share your working rock parameters with us. We can match the optimal carbide insert grade to extend tool life and boost your drilling efficiency.
