R Thread Self Drilling Anchor Manufacturer
What's R Thread Self Drilling Anchor?
R Thread self drilling hollow grout anchor is a fully threaded, hollow steel anchor bar designed for simultaneous drilling, grouting, and anchoring in unstable or difficult ground conditions.
The continuous R-thread profile allows efficient load transfer along the entire anchor length, making it especially suitable for temporary and permanent ground support applications where high bond strength and adaptability are required.
Key benefits of R Thread anchors:
- Continuous load transfer along the full anchor length
- Excellent bonding performance with grout
- Compatible with standard couplers, nuts, and bearing plates
- Easy length extension using threaded couplers
- Proven performance in tunneling and slope support projects
SDA System Components
- 01 Hollow Anchor Rod: Threaded hollow steel rod used for drilling, grouting, and permanent anchoring with high tensile .
- 02 Drill Bit: Sacrificial drill bit for efficient penetration, available in cross, button, or clay types matched to anchor size.
- 03 Centralizer: Steel plate distributing anchor load evenly to the supported structure or ground surface.
- 04 Coupler: Threaded steel coupler connecting anchor rods to achieve greater drilling depth and continuous load transfer.
- 05 Anchor Nut: Heavy-duty threaded nut securing the anchor system after installation and ensuring reliable load transmission.
- 06 Anchor Plate: Cement-based grout injected through the hollow core to bond surrounding ground and provide corrosion protection.
Self Drilling Anchor Types & Specifications
| R Thread Type | Outer Diameter | Inner Diameter | Steel Grade | Yield Strength | Typical Applications |
|---|---|---|---|---|---|
| R25 | 25 mm | Customized | Alloy Steel | ≥ 500 MPa | Slope stabilization, light tunneling |
| R32 | 32 mm | Customized | Alloy Steel | ≥ 500 MPa | Tunnel support, foundation works |
| R38 | 38 mm | Customized | Alloy Steel | ≥ 500 MPa | Mining, rock reinforcement |
| R51 | 51 mm | Customized | Alloy Steel | ≥ 500 MPa | Heavy-duty anchoring, deep foundations |
Custom R Thread Self Drilling Anchor
OEM R Thread Self Drilling Anchor
Sdarockbolt support comprehensive customization services:
Anchor length and diameter
Thread type and pitch
Surface treatment and corrosion protection
Packaging and labeling
Project-specific technical requirements
Our engineering team works closely with customers to deliver optimized anchoring solutions.
Material & Corrosion Protection Options
To meet different environmental and project requirements, we offer multiple material and surface treatment options:
Base Material: High-strength alloy steel
Surface Finishes:Black / Plain, Hot-dip Galvanized, Epoxy Coated
Corrosion Resistance Levels:
Suitable for temporary or permanent ground support applications.
R Thread Self Drilling Anchor Applications
Self drilling hollow grout anchors are widely used in: Tunnel and underground excavation support, Slope stabilization and landslide prevention, Mining and rock reinforcement, Foundation and underpinning works,Rock bolting in difficult geological conditions
Soil Nailing
Tunnel and Metro Support
Slope Stabilization in Highways
Buildings Foundation Reinforcement
Underground Mining Support
Self Drilling Anchors vs Traditional Anchoring Methods
| Comparison Item | Self Drilling Anchor | Traditional Anchor |
|---|---|---|
| Borehole Stability | Excellent | Poor in loose ground |
| Installation Speed | Fast | Slow |
| Ground Adaptability | High | Limited |
| Construction Safety | High | Lower |
| Overall Cost | Optimized | Higher in difficult ground |