Explore our premium product portfolio featuring high-speed steel, carbide-tipped, and diamond cutting tools engineered for high-performance applications.
Established in 2018, Danyang Dongze Hardware Tools Co., Ltd. was founded with a singular, clear mission: to engineer and supply high-performance, industrial-grade hardware and cutting tools that meet the rigorous standards of professional construction and manufacturing sectors. Through years of persistent R&D and active market listening, we have expanded our export capacity, sending precision-engineered SDS Plus concrete drill bits, cobalt HSS cutting systems, and high-performance saw blades to leading companies across Europe, North America, Australia, South Korea, and the Middle East.
Our operation covers the entire production lifecycle, including advanced tool geometry design, rapid quoting, and end-to-end quality assurance. Supported by a skilled engineering team, we assist industrial buyers in customizing tools to meet structural specifications, ensuring every delivery complies with target market regulations.
State-of-the-Art Heat Treatment
Professional In-House Inspection
Analyzing key structural shifts in high-strength concrete drilling and tool manufacturing across regional markets.
Global infrastructure investments require heavy-duty anchoring and reinforcement systems. Today's commercial buildings rely on high-strength concrete (exceeding 50 MPa) and rebar-reinforced structures. This shift requires high-grade SDS Plus and SDS Max drill bits that can drill through rebar without snapping the carbide head or losing torque, reducing downtime on large construction projects.
Industrial buyers and large distributors are moving away from intermediaries and partnering directly with specialized factories. As a result, direct manufacturer collaborations are becoming essential for managing cost volatility in raw materials, such as cobalt and tungsten carbide. We offer direct-from-factory pricing combined with technical transparency to ensure our clients maintain a competitive edge.
Different markets enforce distinct construction requirements. The European Union relies on Germany's PGM certification to guarantee hole diameter consistency for safety anchors, while North American markets follow ANSI standards. Understanding and complying with these local codes ensures that every product in our line is safe, reliable, and legal for use in critical structural projects.
A closer look at the advanced materials, shank dynamics, and flute configurations that define our SDS product line.
Rotary hammer drilling is a highly demanding application. High-impact forces and rotational torque create extreme stress at the drill bit tip. To prevent premature wear, head loss, and flute warping, Danyang Dongze uses premium alloy steel bodies combined with high-density tungsten carbide inserts. The table below outlines our standard mechanical configurations:
| Feature / Parameter | SDS Plus (Standard) | SDS Max (Heavy Duty) | Manufacturing Technology |
|---|---|---|---|
| Shank Diameter | 10 mm with two open and two closed grooves | 18 mm with three open grooves and spline segments | Cold-forged steel with CNC precision milling |
| Carbide Tip Chemistry | YG8C / YG11C (Tungsten Carbide with Cobalt binder) | YG11C (Enhanced impact toughness) | High-temperature copper-silver vacuum brazing |
| Flute Configuration | Double (U-Type or L-Type) / Quad Flute | Multi-Flute (Reinforced Core Geometry) | Milled or roll-grooved, heat-treated to 48-52 HRC |
| Target Drilling Substrate | Concrete, masonry, brick, natural stone | Reinforced concrete, hard granite, stone structures | Optimized for high-impact pneumatic hammers |
| Drilling Diameter Range | 4.0 mm – 32.0 mm | 12.0 mm – 52.0 mm | Calibrated to strict PGM tolerances |
A drill bit's durability is directly tied to its tip geometry. Danyang Dongze offers both 2-cutter and 4-cutter (cross-head) configurations. The 2-cutter tip provides fast dust removal in brick and block masonry. The 4-cutter head features a solid cross-tip layout that reduces vibration, delivers rounder holes for safer anchoring, and prevents binding when hitting rebar.
Our high-temperature vacuum brazing process forms a strong bond between the carbide tip and the steel body. This keeps the head secure even under temperatures exceeding 1000°C, ensuring consistent tool life in demanding on-site applications.
Drill dust left in a hole acts as an abrasive, slowing down progress and raising temperatures. To address this, our flute geometries are engineered for fast dust extraction. The dual-flute U-type profile maximizes volume for rapid removal, while our four-flute designs reinforce the bit core, translating more impact energy from the rotary hammer directly to the tip.
By optimizing energy transmission, this design minimizes vibration-related strain on the operator, extends tool life, and improves overall drilling speed.
How our custom tools perform under diverse regional work environments and technical standards.
In Europe, safety regulations require anchor holes to be drilled within precise dimensional tolerances. Out-of-spec holes can compromise anchor load capacities. Our PGM-compliant SDS Plus bits drill straight, highly accurate holes, ensuring mechanical and chemical anchors seat securely in commercial buildings and civil works.
Modernization of industrial warehouses and office structures requires drilling thousands of overhead holes for HVAC, piping, and electrical cable trays. In these situations, speed and dust reduction are critical. Our core-reinforced SDS bits minimize bending under lateral force, helping technicians work quickly and safely on large-scale commercial job sites.
For operations in remote regions or harsh coastal environments, tool life is crucial to keeping supply costs down. Our specialized heat-treatment processes provide high resistance to abrasive wear, making our drill bits ideal for working with dense limestone, granite, and reinforced concrete in high-humidity areas.
Our production lines operate under strict quality management frameworks to ensure performance consistency across batches.
ISO 9001:2015
Production Qualification
Compliance Inspection
EU Conformity Certificate
How we are evolving our production capabilities to meet the next generation of smart and sustainable drilling demands.
To support silica dust compliance regulations (such as OSHA guidelines), we are expanding production of hollow dust-free extraction drill bits. These tools vacuum up concrete dust directly at the cutter tip during drilling, protecting operator health and leaving clean holes ready for immediate epoxy injection.
We are updating our manufacturing lines to include energy-efficient induction heating systems. By replacing older fossil-fuel furnaces with automated induction brazing machinery, we reduce thermal waste, lower carbon emissions per unit, and ensure highly consistent bonding temperatures for our carbide tips.
We are partnering with domestic metallurgy research labs to integrate micro-grain tungsten carbide inserts into our heavy-duty product lines. The refined grain structure increases overall material density, giving the drill tips better impact toughness and wear resistance when cutting through structural rebar.
Connecting directly with global partners to better understand field challenges and tailor our manufacturing output.
Detailed answers to common questions about specifications, ordering logistics, and product features.
The main differences are shank size and the type of applications they are suited for. SDS Plus shanks measure 10 mm in diameter and are designed for light-to-medium drilling (typically 4 mm to 32 mm holes) using handheld rotary hammers. SDS Max shanks measure 18 mm in diameter, feature larger drive slots, and are built for heavy commercial drilling and demolition work using larger pneumatic hammer drills.
We prevent head failures by focusing on material quality and brazing strength. We use premium YG8C and YG11C carbide tips, which offer a balanced ratio of hardness to impact resistance. Additionally, we use a high-temperature copper-silver vacuum brazing process that creates a highly stable, heat-resistant bond between the carbide tip and the steel body.
Yes, we provide complete OEM and ODM support. We can custom-brand the drill bits with laser etching and design retail packaging, such as color sleeves, plastic tubes, set storage cases, or metal boxes, to fit your brand identity and market requirements.
We run a two-step quality control process. Every batch of incoming steel and carbide undergoes chemical composition verification. During and after manufacturing, we test product dimensions, runout tolerances, and hardness, followed by actual drilling tests in high-strength concrete blocks before approval for shipping.
Lead times depend on the size of the order and customization requirements. Standard products usually ship within 30 to 45 days. For custom OEM profiles or specialized packaging designs, lead times typically range from 45 to 60 days from final design approval.
Our 4-cutter (cross-head) drill bits are specifically designed to handle rebar contact. The cross-head geometry distributes impact forces evenly, which prevents the bit from binding or breaking when it hits steel rebar. For heavy rebar applications, we recommend running the rotary hammer at a steady pressure without forcing it to ensure clean, controlled cutting.
Choose from our wholesale product selection. Standard sizes are kept in stock for fast order fulfillment and shipping.
Dongze Hardware
