T Thread Bars – T30
R25 R32 R38 R51 T30 T40 T76

Self-drilling anchor (SDA) combines drilling, insertion and grouting into one easy operation. It reduces project lead time and installation difficulty. Mayland Metallic Materials Ltd. utilizes low carbon steel in all of its anchor production. Low carbon content in steel increases its ductility, reduces its brittleness, and resists corrosion cracking and carbon embrittlement. This choice of material significantly reduces occurrences where rockbolt may snap or buckle during onsite installation.

Anchor Body Drill Bit Hex Nut Arch Plate Coupler

Test Report Link Goes Here

Anchor Body

Rock Bolt Type Outer Diameter Inner Diameter Weight Cross Section Area Yield Load Ultimate Tensile Load
T30/14 30 mm 14 mm 2.90 kg/m 395 mm2 220 kN 260 kN
T30/11 30 mm 11 mm 3.30 kg/m 446 mm2 260 kN 320 kN

Hex Nut

Hex Nut Type Width Across Flats Length Thread Direction Weight
T30 46 mm 38 mm L 0.40 kg/pc

Drill Bit

EW Clay
Drill Bit Size Drill Bit Type Condition Outer Diameter Weight Thread Direction
T30 EX – Steel Cross Bit Mixed Soils – Soft to Medium Conditions 51 mm 0.40 kg/pc Left
T30 EXX – Carbide Cross Bit Mixed Soils – Soft to Medium Conditions 51 mm 0.40 kg/pc Left
T30 ESSF – Tungsten Carbide Button Bit Medium Soil Condition 51 mm 0.69 kg/pc Left
T30 EW – Clay Bit Clay and Loose Soil 76 mm 0.56 kg/pc Left


Coupler Type Outer Diameter Length Thread Direction Weight
T30 42 mm 105 mm Left 0.60 kg/pc

Arch Plate

Arch Plate Type Width Length Thickness Hole Diameter Weight
T30 150 mm 150 mm 8 mm 35 mm 1.30 kg/pc