SDA Anchor Couplers Self Drilling Anchor (SDA)
SDA ANCHOR COUPLERS

SDA Anchor Couplers

High-strength internally threaded anchor couplers engineered to join adjoining R32 and R38 hollow anchor bars. Featuring an internal center-stop design that ensures 50/50 equal thread engagement on both bars while maintaining an uninterrupted central conduit for fluid flushing and pressure grouting. Lab-tested to achieve 100% of the bar's ultimate tensile capacity (HRC 25–30).

Center-Stop Safety
Guarantees full thread penetration from both bar ends
100% Load Transfer
Transmits full tensile, percussive, and torsional energy
Continuous Grout Passage
Center bore preserves grout flush flow without restriction
High Fatigue Life
Lab certified HRC 25–30 hardness prevents thread stripping under impact
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ENGINEERING METRICS

TECHNICAL DATA & SPECIFICATIONS

Certified engineering tolerances, metallurgical grades, and load metrics for heavy geotechnical installations.

SDA Anchor Couplers — Technical Data Sheet

Quality Assurance Standard: ISO 10208 / EN 14199

# Technical Metric Certified Specification
01
Coupler Standard
ISO 10208 Internal Rope Thread
02
R32 Coupler Dimensions
Outer Diameter 42 mm | Length: 145 mm (R32L), 160 mm (R32N), 190 mm (R32S) | Weight: 0.60–1.15 kg
03
R38 Coupler Dimensions
Outer Diameter 52 mm | Length: 220 mm | Weight: 1.50 kg
04
Hardness Standard
Lab Certified HRC 25–30 (Guarantees fitting capacity matches bar capacity)
05
Internal Design
Center-Stop Ridge ensures equal bar insertion and prevent cross-threading
06
Load Capacity
100% transmission of bar ultimate load (280–500 kN)
07
Material Grade
EN 10083-1 High Tensile Micro-Alloy Steel
08
Coating
Hot-Dip Galvanization (ISO 1461) / Black Bare Steel
100% Ultrasonic flaw tested and batch certified under ISO 9001:2015 QA procedures.
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Verified Technical Reference

Anchor Coupler Hardness & Load Matching Standard

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Coupler engineering rule: Tensile strength increases in direct proportion to hardness. It is essential that coupler fitting capacity matches 100% of the bar ultimate load. Standard factory hardness is verified at HRC 25–30 for guaranteed load transfer.
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