R25 R32 R38 Self Drilling Hollow Anchor Rods
Release time:
2026-03-23
R25 R32 R38 Self Drilling Hollow Anchor Rods
Keywords: Self drilling anchor rods, hollow anchor bar, R25 R32 R38 R51, tunnel support anchor, rock reinforcement system, self-drilling bolts, ground stabilization anchors
Product Overview
R25 R32 R38 Self Drilling Hollow Anchor Rods for Tunnel Rock Support System.The R25, R32, R38, and R51 Self Drilling Hollow Anchor Rods are advanced anchoring solutions designed for tunnel rock reinforcement, slope stabilization, and underground construction. These rods integrate drilling, grouting, and anchoring into one efficient system, making them ideal for weak, fractured, or weathered geological conditions where traditional anchors are not suitable. Their hollow design allows for simultaneous drilling and grout injection, saving time and enhancing support reliability.
Material & Surface Treatment
Carbon Steel or Alloy Steel (typically 20MnSi, 40Cr, or customized). Surface Treatment: Hot dip galvanized, cold galvanized, or black finish.
Product Specifications
Model | Outer Diameter (mm) | Inner Diameter (mm) | Thread Type | Yield Strength (MPa) | Ultimate Strength (MPa) |
R25 | 25 | ~14 | Rope Thread | ≥500 | ≥620 |
R32 | 32 | ~18 | Rope Thread | ≥500 | ≥620 |
R38 | 38 | ~21 | Rope Thread | ≥500 | ≥620 |
R51 | 51 | ~32 | Rope Thread | ≥500 | ≥620 |
Key Features
- One-step installation: drilling and grouting simultaneously.
- Suitable for loose or collapsing ground conditions.
- Continuous thread for easy coupling and length adjustment.
- High bonding capacity with cement or resin grout.
- Compatible with various drill bits: button, clay, cross, or reaming.
Applications
- Tunnel wall and crown stabilization
- Soft or fractured rock consolidation
- Mining drift support
- Dam and slope reinforcement
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No.181,Financial Center, Dongchang Road, Liaocheng City, Shandong Province, China