Self Drilling Anchor (SDA)
SIGRICARE is a premier manufacturer and exporter of Self Drilling Anchor (SDA) Bolt Systems, hollow bar anchors, rock bolts, couplers, plates, and sacrificial drill bits.
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.
R38 SDA (Self Drilling Anchor Bolt)
The R38 SDA (Self Drilling Anchor Bolt) is a high-capacity continuous-thread hollow steel rock anchor engineered for demanding tunneling portals, heavy slope stabilization, railway cuts, and deep foundation tiebacks. The R38 bar delivers an ultimate tensile load of 500 kN and a yield load of 400 kN, offering 40% higher tensile strength than standard R32 anchors.
All Drill Bits (R25, R32, R38, R51, T76 Complete Series)
The Complete SDA Rock Drill Bits Series is a comprehensive, multi-profile portfolio of sacrificial rotary-percussive rock drill bits engineered for Self Drilling Anchor hollow bars across all industry standards: R25, R32, R38, R51, and T76 (ISO 10208 / EN 14199). Precision manufactured with high-durability alloy steel bodies and premium sintered tungsten carbide inserts, this complete range accommodates every geological condition from soft clay, gravel, and weathered shale to massive basalt and hard abrasive granite.
Carbide Drill Bit (R25, R32, R38, R51, T76)
The Sigricare Carbide Drill Bit series features premium sintered Tungsten Carbide (TC) spherical and ballistic button inserts precision-brazed into heavy-duty heat-treated alloy steel bit bodies. Engineered specifically for rotary-percussive drilling in medium-to-hard rock, abrasive granite, sandstone, basalt, limestone, and boulder-rich overburden. Available in comprehensive sizing: R25 (42mm), R32 (51mm, 64mm, 76mm), R38 (76mm, 90mm), R51 (90mm, 110mm), and T76 (115mm, 120mm) to match the complete range of Self Drilling Anchor hollow bars.
Steel Drill Bit (For Loose Starter)
The Hardened Steel Sacrificial Drill Bit is an economical, high-efficiency cutting tool engineered specifically for initiating collar holes and drilling through soft, loose, or cohesive starter overburden formations such as silt, loose sand, soft clay, and weathered gravel. Designed to thread directly onto Self Drilling Anchor (SDA) hollow bars, this all-steel bit features high-flow fluid ports to enable aggressive mud or water flushing while stabilizing collapsible ground in the critical initial meters of drilling.
T76 Bit (Heavy-Duty Foundation & Tunneling Drill Bit)
The T76 Bit is a large-diameter sacrificial rotary-percussive drill bit engineered specifically for heavy geotechnical ground reinforcement with T76N and T76S Self Drilling Anchor hollow bars. Designed for maximum load transmission under high-energy hydraulic drifters, the T76 bit utilizes reinforced carbide gauge buttons and heavy-duty alloy steel body construction to drill through boulders, hard bedrock, and mixed overburden in tunneling umbrella arches, deep foundation micropiles, and high retaining wall anchors.
R25 Drill Bit (Cross Bit)
Sacrificial rotary-percussive drill bits designed specifically for R25 Self Drilling Anchor bars (ISO 10208). Available in Hardened Steel Cross Bits (EX), Tungsten Carbide Cross Bits (EXX), Hardened Button Bits (ESF), and Tungsten Carbide Button Bits (ESSF) for soft soils to medium rock formations.
R32 Drill Bit (Button Bit)
Precision engineered sacrificial drill bits for R32 hollow anchor bars (R32L, R32N, R32S). Featuring heavy-gauge alloy steel bodies with sintered tungsten carbide buttons or hardened cross cutting edges. Delivers rapid penetration across sand, gravel, boulder beds, and medium-hard rock.
R38 Drill Bit (Heavy-Duty Button Bit)
Heavy-duty sacrificial drill bits engineered for R38 Self Drilling Anchor bars, delivering high penetration rates in tough geotechnical drilling, hard bedrock, abrasive sandstone, and boulder formations. Available in large diameters (76mm to 110mm) for high-capacity tiebacks and micropiles.
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).
T76 Anchor Coupler (Heavy-Duty Threaded Coupler)
Extra-heavy-duty internally threaded coupler manufactured for T76 hollow anchor bars (T76N and T76S). Capable of transmitting extreme ultimate tensile loads up to 1900 kN and heavy rotary percussion from large drill rigs. Precision machined from premium structural alloy steel with internal center-stop.
CTA Bar (Composite Threaded Anchor Bar)
The CTA Bar (Composite Threaded Anchor Bar) is an advanced high-tensile threaded rock anchor engineered for heavy-duty earth retention, underground cavern arching, tieback anchors, and foundation underpinning. Manufactured with precision cold-formed continuous thread profiles, CTA bars deliver unyielding pullout resistance and high shear capability.
OVERVIEW: Self Drilling Anchor (SDA)
The SIGRICARE Self Drilling Anchor (SDA) System combines rotary-percussive drilling, hollow anchor bar installation, and pressure grouting into a single continuous pass. Specially engineered for loose, collapsing, and fractured ground conditions where conventional borehole drilling is impossible without casing. Available across complete thread standards: R25, R32, R38, R51, and T76 compliant with ISO 10208 and EN 14199.