Custom Self Drilling Threaded Anchor Manufacturer in China

Sinodrills provides premium self-drilling threaded anchors, engineered for robust and efficient ground support. Our anchors feature continuous threading, allowing for strong mechanical connections with couplers, nuts, and bearing plates. This design ensures superior load transfer and adaptability in diverse geological conditions. We offer a range of sizes and materials, delivering reliable anchoring solutions for complex civil and geotechnical projects.

Sinodrills - Your Trusted Self Drilling Threaded Anchor Manufacturer from China

Sinodrills is your trusted self-drilling threaded anchor manufacturer from China. We offer a comprehensive range of high-quality threaded anchor systems, including hollow bars, specialized drill bits, coupling sleeves, nuts, and bearing plates. Our anchors are designed for efficient installation and robust performance in diverse ground conditions, ensuring reliable and secure solutions for various construction and geotechnical applications.

T threaded self drilling anchor

Sinodrills specializes in providing T-threaded self-drilling anchors, engineered for superior performance and robust connections. Our T-threaded self drilling anchor system offers enhanced bond strength and efficient torque transfer, ideal for demanding geotechnical applications in rock and challenging ground conditions. We supply the full range of T-threaded bars, corresponding drill bits, couplers, and nuts, ensuring a complete and reliable anchoring solution for your project.

R threaded self drilling anchor

Sinodrills specializes in providing R-threaded self-drilling anchors, engineered for robust performance and secure connections. Our R-threaded system ensures easy coupling and extension, making it ideal for varying depths and complex ground conditions. These anchors integrate drilling and grouting seamlessly, offering efficient installation and high load-bearing capacity for reliable ground support in demanding geotechnical and construction applications.

T Thread and R Thread Self Drilling Anchor

Thread Profile and Design

R-thread self-drilling anchors feature a “rope” or corrugated thread profile, designed according to ISO 10208 and ISO 1720 standards. This continuous, wave-like pattern provides excellent self-cleaning properties during drilling. In contrast, T-thread anchors have a trapezoidal, deeper, and more robust thread profile, designed for higher load transfer.

Bonding Area and Friction

Due to its trapezoidal shape and deeper thread depth, the T-thread typically offers a significantly larger bonding area with the surrounding grout or concrete compared to the R-thread. This increased surface contact translates to superior bond friction, often more than double that of an R-thread of comparable size, enhancing pull-out resistance.

Load Capacity and Application

T-thread anchors generally provide a greater support force and are preferred for applications demanding higher load capacities, such as mini-piles, deep foundations, and heavy structural underpinning. R-thread anchors, while strong, are typically used for smaller diameter bars and general ground support applications like soil nailing and slope stabilization.

International Standards and Size Range

R-thread anchors adhere to ISO 10208 and ISO 1720 standards, commonly found in sizes like R25, R32, R38, and R51. T-thread anchors follow T International Standards (e.g., T30, T40, T52, T73, T103), often associated with larger diameters and higher-performance requirements in demanding geotechnical projects.

what is self drilling threaded anchor?

A self-drilling threaded anchor is an advanced anchoring system that integrates the drilling process with the anchor itself, eliminating the need for a pre-drilled bore.

It consists of a hollow steel bar with external threads along its length and a sacrificial drill bit at one end. As the anchor is rotated and advanced into the ground, the drill bit creates the hole, while the threads engage with the surrounding soil or rock.

Simultaneously, grout can be injected through the hollow core, filling the annulus and bonding the anchor securely to the ground, providing efficient and robust ground support.

What is the diameter of a self drilling anchor?

The diameter of a self-drilling anchor can vary significantly depending on the specific application, required load capacity, and ground conditions. Manufacturers produce a range of sizes to accommodate diverse project needs.

Common Range: Typically, self-drilling anchors range in diameter from 25 mm to 103 mm (approximately 1 inch to 4 inches).
Smaller Diameters: Smaller diameters, such as R25, R32, or T30, are often used for lighter loads, soil nailing, or localized stabilization.
Larger Diameters: Larger diameters like R51, T73, or T103 are designed for heavier loads, micropiles, or applications requiring greater bond strength in challenging ground.
Custom Sizes: Specialized projects may even utilize custom diameters beyond this standard range for unique geotechnical requirements.

what are benefits of self drilling threaded anchors?

Self-drilling threaded anchors offer significant advantages over traditional anchoring methods, streamlining construction processes and enhancing overall project efficiency.

Speed and Efficiency: They combine drilling, grouting, and anchoring into a single, continuous operation, drastically reducing installation time and labor costs.
Adaptability to Difficult Ground: Ideal for unstable, collapsing, or highly fractured ground conditions, as they provide immediate borehole stability without the need for casing.
Enhanced Safety: Reduces manual handling and the need for personnel to enter boreholes, minimizing risks on construction sites.
High Performance: The integrated drilling and grouting process ensures excellent bond strength and high load-bearing capacity, providing reliable ground support.
Reduced Equipment Needs: Often requires less specialized equipment compared to multi-stage traditional anchoring, simplifying logistics and setup.

what are different types of self drilling threads?

Self-drilling anchor bolts primarily feature two main types of threads, each designed for specific performance characteristics and applications:

R-Thread (Rope Thread): This thread type has a continuous, wave-like, or “rope” profile, compliant with ISO 10208 and ISO 1720 standards. It is known for its excellent self-cleaning properties during drilling, making it suitable for a wide range of ground conditions. R-threads are commonly used in smaller diameter anchors.
T-Thread (Trapezoidal Thread): Characterized by a deeper, more robust trapezoidal thread profile conforming to T International Standards (e.g., T30, T40). T-threads offer a significantly larger bonding area with grout, resulting in higher bond friction and greater load-bearing capacity, making them ideal for heavier load applications.

where can you use self drilling threaded anchors?

Self-drilling threaded anchors are incredibly versatile, finding application across a broad spectrum of construction and geotechnical engineering projects.

Their ability to drill and anchor simultaneously makes them particularly valuable in challenging ground conditions where traditional methods are less efficient or even impossible.

Slope Stabilization: They are frequently used to reinforce unstable slopes and embankments, preventing landslides and erosion for infrastructure like highways, railways, and in urban development.
Tunneling and Mining: In underground works, these anchors provide crucial ground support for tunnel walls and roofs, ensuring stability and safety during excavation and operation.
Foundation Support & Underpinning: They serve as micropiles for new foundations or to underpin existing structures, offering robust uplift and compressive resistance in areas with weak or variable ground.
Retaining Walls and Excavation Support: Essential for anchoring various retaining structures and providing temporary or permanent support for deep excavations, counteracting lateral earth pressures.
Bridge Construction & Rehabilitation: They provide reliable anchoring solutions for bridge abutments, piers, and other structural components, especially in complex geological formations.
Temporary and Permanent Ground Support: Their quick installation makes them ideal for both temporary shoring and permanent reinforcement in diverse civil engineering applications.

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All-in-one Self Drilling Threaded Anchor Solutions for Your Project

Sinodrills offers comprehensive, all-in-one self-drilling threaded anchor solutions for your project needs. We provide hollow threaded bars, specialized drill bits, couplers, nuts, and bearing plates, ensuring seamless integration for efficient and reliable ground support. Our tailored systems are designed to meet diverse geological challenges, guaranteeing optimal performance and simplifying your construction processes, especially for rock and soil anchoring.