Standard Sizes: NQ / HQ / PQ (Full Wireline System Compatibility)
Outer Diameters (OD): NQ (75.7mm) / HQ (96.0mm) / PQ (122.6mm)
Inner Diameters (ID): NQ (47.6mm) / HQ (63.5mm) / PQ (85.0mm)
Available Bit Types: Impregnated Diamond, Surface-Set, and PDC Core Bits
Crown Profiles: Semi-Round, Flat, Stepped, Stage
Core Application: Mineral Exploration, Geotechnical Boring, and Environmental Sampling
Standard Wireline Diamond Core Bits: NQ / HQ / PQ Size Series
In diamond core drilling, choosing the correct size interface is paramount to ensuring project compatibility and optimal core recovery. Bloom Machinery offers a complete lineup of standard wireline diamond core bits in NQ, HQ, and PQ configurations. Precision-engineered to strict international dimensional standards, our core bits guarantee a seamless fit with your existing wireline core barrels, outer tubes, and reaming shells.
Manufactured using premium raw materials and advanced hot-pressed sintering technology, our NQ/HQ/PQ size series handles everything from standard mineral exploration to heavy-duty civil engineering site investigations. Whether you require a high-production NQ bit for deep-hole gold exploration, an HQ bit for standard coal sampling, or a large-diameter PQ bit for unstable overburden formations, our dimensional series delivers exceptional track stability, uniform flushing, and maximum meters-per-bit performance.
Size Configuration | Bit Outer Diameter (OD) | Bit Inner Diameter (ID) | Core Diameter (Sample Size) | Primary Engineering Application |
NQ Core Bit | 75.7 mm (2.980 in) | 47.6 mm (1.875 in) | 47.6 mm | Deep-Hole Exploration: Most popular size for deep mineral prospecting, iron ore, and gold mining due to low rotational resistance. |
HQ Core Bit | 96.0 mm (3.782 in) | 63.5 mm (2.500 in) | 63.5 mm | Standard Geotechnical: Ideal for standard civil engineering, dam site investigation, and coal stratum sampling with excellent sample stability. |
PQ Core Bit | 122.6 mm (4.828 in) | 85.0 mm (3.345 in) | 85.0 mm | Large-Diameter Boring: Tailored for complex, fractured, and unconsolidated formations where maximum core sample diameter is required. |
To ensure a complete drill string setup, Bloom Machinery also provides matching casing shoes and casing bits for BQ, NQ, HQ, and PQ casing advancement systems. Engineered to seat casing tubes perfectly in broken overburden layers...
Contact: Kevin Dai
Phone: 13605749661
E-mail: sales@bloommachinery.com
Whatsapp:+86 13605749661
Add: Hehua Bridge, Yunlong Town, Yinzhou Distric, Ningbo City, ZheJiang Province
