Anchor Tool Self Drilling Anchor Threaded Bar Anchor Rods Rock Bolt
The main feature of the Self-Drilling Anchor (SDA) system is the application of a single-use drill bit in combination with the rock bolt being used as a drill steel. Thus, the rock bolt is connected to the hydraulic rock drill by an adapter device and installed in the way a conventional borehole is drilled. The SDA program consists of the following:
1. Single-use drill bits: Available either hardened or with carbide inserts.
2. Hollow steel bars: Features a continuous outside thread.
3. Steel couplings: Configured with a continuous inside thread.
4. Steel nuts: Specifically designed matching nuts.
5. Steel face plates: Durable load-bearing plates.
The bolts are classified according to thread type and material:
R-type: Features a rope thread, available in sizes from R25 to R51.
T-type: Conforms to international standards, available in sizes from T30 to T103.
FRP bolts: Made out of fiberglass, available from S15 to SXX in both solid and hollow versions.
Applications:
The SDA system is suitable for simultaneous drilling and grouting in various applications:
Tunnelling and Mining: Radial bolting, Spiling, Face stabilisation, Portal preparation.
Ground Engineering: Ground consolidation and injection, Soil nailing, Slope stabilisation, Microinjection pile, Temporary support anchoring.
Product Specifications
Describe
R32L
R32N/21
R32N/18.5
R32S/17
R32SS/14
Outside diameter (mm)
32
Internal diameter (mm)
22
21
18.5
17
14
Cross section Area (mm²)
356
363
443
440
522
Ultimate load (Kn)
260
280
280
360
405
Yield Load (Kn)
200
230
230
280
300
Weight (kg/m)
2.8
2.85
3.4
3.45
4.1
Rod material
40Cr
Length (m)
3m 4m 6m 9m 10m
Company Profile
Sales and Service Network
Why Choose Us
Company Advantage
1. Advanced Equipment: The company features advanced technology and equipment, enabling high-quality production and a strong competitive edge in the market.
2. Talent Advantage: Powered by a large team of high-quality professionals, we foster superior efficiency and continuous innovation in R&D, production, and management.
3. Channel Advantage: Extensive distribution and sales network channels ensure comprehensive market coverage and optimized logistics support.
4. Cultural Advantage: Our robust corporate culture and positive values build employee loyalty, ownership, and align our team for long-term growth.
Frequently Asked Questions
Q1: What is a Self-Drilling Anchor (SDA) system?
A: A Self-Drilling Anchor system is a rock bolting technique that utilizes a hollow anchor rod functioning as a drill steel combined with a single-use drill bit. This allows drilling, anchoring, and grouting to be performed simultaneously, significantly speeding up construction.
Q2: What are the main components included in the SDA program?
A: The complete system includes single-use drill bits (hardened or with carbide inserts), hollow steel bars with a continuous outside thread, steel couplings with internal threads, steel nuts, and load-bearing steel face plates.
Q3: What are the differences between R-type, T-type, and FRP bolts?
A: R-type anchors feature a rope thread and are available in sizes R25-R51. T-type anchors follow international standards with sizes T30-T103. FRP bolts are made of lightweight, high-strength fiberglass, offered in solid or hollow formats from S15 to SXX.
Q4: In what engineering applications are self-drilling anchors used?
A: They are widely applied in tunneling and mining (such as radial bolting, face stabilization, and spiling) as well as ground engineering projects (including soil nailing, slope stabilization, microinjection piles, and temporary support anchoring).
Q5: What are the material specifications for the R32 anchor rods?
A: The R32 anchor rods are made of high-quality 40Cr steel, featuring an outside diameter of 32mm. Depending on the model (e.g., R32L, R32N, R32S, R32SS), ultimate load capacities range from 260 Kn up to 405 Kn, and yield loads range from 200 Kn to 300 Kn.
Q6: What standard lengths are available for R32 anchor rods?
A: R32 anchor rods are available in standard lengths of 3m, 4m, 6m, 9m, and 10m to fit different drilling depths and project requirements.
