Dezhou Drillstar has officially launched a comprehensive product line of solid carbide gun drills. Leveraging three core proprietary technologies—carbide forming, precision 5-axis grinding, and specialized wear-resistant coating—the company fills a critical gap in the market for high-precision, small-diameter deep-hole machining tools. When paired with the brand’s ZK21 and ZKF21 series CNC deep-hole drilling machines, these tools ensure seamless synergy. Designed for high-end manufacturing sectors such as automotive fuel injectors, precision aerospace components, medical devices, and hydraulic valve blocks, this solution addresses common industry pain points—including hole deviation, tool breakage, poor surface finish, and short tool life in batch production—offering a new domestic alternative for precision deep-hole manufacturing.
Monolithic Construction: Superior Structural Advantages of Solid Carbide Gun Drills
Unlike traditional gun drills that rely on brazing to join the drill head and shank, Dezhou Drillstar’s solid carbide gun drills are precision-ground from a single solid carbide rod. With no welded joints, the design fundamentally eliminates issues such as thermal stress from welding, joint cracking, and catastrophic failure (head detachment) during high-speed cutting.
Ultra-High Rigidity: Suppressing Vibration and Preventing Hole Deviation
The solid carbide body offers significantly enhanced flexural and torsional strength, minimizing torsional vibration during high-speed feed operations. This enables stable, controlled machining of ultra-deep holes with length-to-diameter ratios of 80:1 to 100:1. Hole straightness is consistently maintained within 0.3 mm/m, and bore diameter accuracy reliably meets IT7–IT9 standards. With a surface roughness of Ra 0.4–1.6 μm, the process meets assembly standards for precision seals without the need for secondary honing. Optimized internal cooling and chip evacuation channels for superior heat dissipation
Features an integrated high-pressure internal cooling channel paired with a wide, large-radius V-shaped external chip flute; high-pressure coolant is delivered directly to the cutting zone to rapidly dissipate heat and flush out chips. Cutting edge angles are optimized for difficult-to-machine materials—such as stainless steel, superalloys, and mold steels—to reduce cutting resistance and eliminate issues like chip clogging and tool breakage.
Enhanced with a durable, wear-resistant coating for significantly extended service life
The tool surface features a composite wear-resistant coating offering high hardness and a low friction coefficient. Compared to standard brazed gun drills, service life increases by over 30% under identical operating conditions. The tool supports multiple professional regrinding cycles, drastically reducing per-unit tooling costs.
Comprehensive specifications with support for non-standard customization
Standard diameters range from Φ0.9 mm to Φ12 mm, with effective machining lengths up to 360 mm, suitable for micro-precision oil holes and deep micro-holes in slender shafts. Customization is also available for non-standard solid carbide gun drills—featuring extended lengths, special angles, or unique flute geometries—to meet specific workpiece requirements and integrate with various specialized deep-hole machine tools.
Perfectly matched with the full range of Dezhou Drillstar deep-hole drilling machines for optimal tool-machine synergy
These new solid carbide gun drills have undergone comprehensive process matching and testing with the company’s ZK21 (single-axis and dual-axis), ZKF21 (three-axis), and ZK2106 (combined gun drill/BTA) machine series. This creates a complete machining solution that resolves common industry challenges regarding mismatched machine and tool parameters and the need for repetitive, time-consuming adjustments. Compatible with ZK2102 single-axis deep-hole drilling machines: Ideal for batch processing of single micro-holes in small shafts and fuel system components (oil pumps/nozzles), ensuring stable output of holes with high straightness.
Compatible with ZKF2103 three-axis deep-hole drilling machines: Enables single-setup formation of multi-axis micro-hole arrays in molds and hydraulic valve blocks; supports continuous multi-station processing without loss of precision.
Compatible with ZK2101LGX2 dual-axis specialized batch machines: Designed for high-volume assembly-line production of oil holes in automotive and motorcycle connecting rods; features four-station cyclic processing matched to high-speed cutting parameters.
Compatible with ZK2106A/W compound deep-hole drilling machines: Handles complex machining of large shafts featuring micro-eccentric holes and indexing holes, while accommodating external chip evacuation requirements typical of gun drilling.
Equipped with OEM TBT-standard accessories and quick-change drill chucks compatible with solid carbide gun drills; allows for easy setup changes without additional tooling modifications, enabling immediate production upon unboxing and significantly shortening trial production cycles.
Proven applications across multiple industries, covering the full spectrum of high-end precision manufacturing:
Automotive components: Oil passages in engine fuel system parts, connecting rods, piston cooling micro-holes, and small piston rods; meets demands for stable, high-volume mass production.
Aerospace manufacturing: Micro-deep holes in superalloy and titanium alloy structural components; meets stringent dimensional tolerance and surface finish requirements.
Hydraulics and mold making: Precision oil passages in hydraulic valve blocks and cooling channels in plastic molds; supports simultaneous processing of multi-hole arrays.
Medical devices: Slender micro-holes in stainless steel implants; ensures burr-free, high-precision machining.
Military precision tubing: Slender deep holes in gun barrels and precision shafts; ensures precise alignment of the hole axis. Dezhou Drillstar offers a one-stop service combining cutting tools and machine tools, empowering manufacturing enterprises to reduce costs and boost efficiency.
Leveraging a comprehensive industry chain, the brand also provides value-added services, including customized cutting parameter solutions, regular tool regrinding, rapid customization of non-standard tools, and end-to-end support for integrated machine-tool and cutting-tool commissioning. Compared to similar imported solid carbide gun drills, these products offer a 50% shorter delivery lead time and a 40% reduction in procurement and maintenance costs, achieving domestic substitution for high-end deep-hole tools while maintaining equivalent machining precision.
Company representatives stated that the launch of this solid carbide gun drill series completes Dezhou Drillstar’s full-chain product matrix—comprising machine tools, gun drill accessories, and process solutions. The portfolio covers everything from small-diameter solid carbide gun drills and medium-diameter brazed gun drills to large-diameter BTA internal-chip-removal drilling tools. The company continues to provide cost-effective, comprehensive solutions to global deep-hole machining customers, helping to upgrade the quality and capabilities of domestic precision equipment manufacturing.
