SDA Bar System (Self Drilling Anchor System) Self Drilling Anchor (SDA)
COMPLETE SELF DRILLING ANCHOR SYSTEM

SDA Bar System (Self Drilling Anchor System)

Complete Self Drilling Anchor (SDA) Bar System combining hollow steel anchor bars, sacrificial drill bits, internal center-stop couplers, domed bearing plates, and spherical hexagonal nuts. Enables simultaneous drilling, anchoring, and pressure grouting in a single pass without casing tubes, drastically improving productivity in weak or collapsing rock masses.

3-in-1 Operation
Drilling, anchoring, and grouting in one continuous pass
No Casing Required
Hollow bar acts as drill rod and permanent reinforcement
High Bond Strength
Continuous rope thread ensures optimal mechanical grout interlock
Modular Coupling
Easily extended to target borehole depths in restricted tunnels
Speak to Geotechnical Engineer
ENGINEERING METRICS

TECHNICAL DATA & SPECIFICATIONS

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

SDA Bar System (Self Drilling Anchor System) — Technical Data Sheet

Quality Assurance Standard: ISO 10208 / EN 14199

# Technical Metric Certified Specification
01
System Standards
ISO 10208 (Rope Thread) / EN 10083-1 / EN 14199
02
Bar Thread Series
R25, R32L, R32N, R32S, R38N, R51L, R51N, T76N, T76S
03
Ultimate Load Capacity
200 kN to 1900 kN
04
Yield Load Capacity
150 kN to 1500 kN
05
Hollow Bar Lengths
1m, 2m, 3m, 4m, 6m (Custom up to 10m)
06
Coupler Efficiency
Transmits 100% of bar ultimate load (HRC 25–30)
07
Corrosion Protection
Hot-Dipped Galvanization (ISO 1461), Bare Steel, Epoxy Coated
08
Applications
Tunnel Pre-Support, Slope Stabilization, Micropiles, Soil Nailing
100% Ultrasonic flaw tested and batch certified under ISO 9001:2015 QA procedures.
Request Mill Test Certificate (MTC)

The SIGRICARE Self Drilling Anchor Bar System combines drilling, anchoring, and grouting into a single operation. Below is the complete engineering matrix across all bar profiles for geotechnical engineering selection:

Self Drilling Anchor Hollow Bar Technical Parameters (ISO 10208 / EN 10083-1)

Specification Unit R 25N R 32L R 32N R 32S R 38N R 51L R 51N T 76N T 76S
Outside Diameter mm 25.00 32.00 32.00 32.00 38.00 51.00 51.00 76.00 76.00
Internal Diameter mm 14.00 22.00 20.00 18.50 22.00 36.00 33.00 51.00 47.00
Cross Sectional Area mm² 292 292 292 416 597 800 1020 2410 2800
Ultimate Load (Ft) kN 200 260 280 360 500 550 800 1600 1900
Yield Load (Fy) kN 150 200 230 280 400 450 630 1200 1500
Unit Weight kg/m 2.30 2.30 2.30 4.10 4.50 8.00 9.40 19.50 23.00
Thread Standard - ISO 10208 ISO 10208 ISO 10208 ISO 10208 ISO 10208 ISO 10208 ISO 10208 ISO 10208 ISO 10208

Threaded Anchor Coupler Engineering Parameters (Lab Certified HRC 25-30)

Specification Unit R 25N R 32L R 32N R 32S R 38N R 51L R 51N T 76N T 76S
Outside Diameter mm 36 42 42 42 52 63 63 95 95
Length mm 150 145 160 190 220 140 200 200 220
Hardness HRC 25–30 25–30 25–30 25–30 25–30 25–30 25–30 25–30 25–30
Unit Weight kg 0.60 0.60 0.60 1.15 1.50 2.30 3.10 6.80 7.40
Steel Grade - EN 10083-1 EN 10083-1 EN 10083-1 EN 10083-1 EN 10083-1 EN 10083-1 EN 10083-1 EN 10083-1 EN 10083-1

Domed Anchor Bearing Plates Dimensions & Thickness

Specification Unit R 25N R 32L R 32N R 32S R 38N R 51L R 51N T 76N T 76S
Plate Size mm 150×150 200×200 200×200 200×200 200×200 200×200 250×250 250×250 250×250
Thickness mm 8 10 10 12 12 30 40 40 40
Hole Diameter mm 30 35 35 35 41 60 60 80 80
Unit Weight kg 1.40 1.40 1.40 3.40 3.40 14.0 18.0 18.0 18.0
Anti-Corrosion - ISO 1461 HDG ISO 1461 HDG ISO 1461 HDG ISO 1461 HDG ISO 1461 HDG ISO 1461 HDG ISO 1461 HDG ISO 1461 HDG ISO 1461 HDG
Sigricare Engineering Support
GET IN TOUCH

ENGINEERED FOR EXTREMES.
READY TO ASSIST.

HEAD OFFICE & WORKS

Ground Floor, Plot, No 42 B, Street No. 5, Rajinder Nagar Industrial Area, Rajendra Nagar, Sahibabad, Ghaziabad, Uttar Pradesh 201007

SEND INQUIRY sigricare@gmail.com
DIRECT RFQ DESK

REQUEST PROJECT QUOTATION

ONLINE