Hollow anchor bar
It combines an anchor rod with a drill pipe and has the dual function of drilling and grouting. Additionally, it features continuous R thread and T thread along its body for easy cutting and connection during construction.
Pressure grouting the anchor rod through the hollow bar consolidates broken rock masses, isolates groundwater, and prevents rod corrosion. This method quickly establishes support and stabilizes the surrounding rock.
Series：Customization is available upon request.
R-type
Thread models include R25, R28, R32, R38, R51.
T-type
Thread models include T30, T40, T52, T64, T73, T76, T103, T111, T130, T150.
parameter
| Technical Data | Unit | R32-210 | R32-280 | R32-360 | R38-500 | R38-550 | R51-550 | R51-800 |
| Outside Diameter | [mm] | 32 | 32 | 32 | 38 | 38 | 51 | 51 |
| Internal Diameter | [mm] | 21 | 19 | 17 | 22 | 18 | 36 | 31 |
| Ultimate Load | [kN] | 210 | 280 | 360 | 500 | 550 | 550 | 800 |
| Yield Load | [kN] | 160 | 230 | 280 | 400 | 450 | 450 | 630 |
| Elongation | [%] | ≥5 | ≥5 | ≥5 | ≥5 | ≥5 | ≥5 | ≥5 |
| Weight | [kg/m] | 2.60 | 2.95 | 3.50 | 4.95 | 5.90 | 6.20 | 8.20 |
| Technical Data | Unit | T40-539 | T40-660 | T52-929 | T73-1160 | T73-1585 | T73-1865 | T76-1600 | T76-1900 | T103-2300 | T103-3660 |
| Outside Diameter | [mm] | 40 | 40 | 52 | 73 | 73 | 73 | 76 | 76 | 103 | 103 |
| Internal Diameter | [mm] | 20 | 16 | 24 | 53 | 45 | 40 | 51 | 45 | 78 | 51 |
| Ultimate Load | [kN] | 539 | 660 | 929 | 1160 | 1585 | 1865 | 1600 | 1900 | 2300 | 3660 |
| Yield Load | [kN] | 430 | 525 | 730 | 970 | 1270 | 1430 | 1200 | 1500 | 1800 | 2670 |
| Elongation | [%] | ≥5 | ≥5 | ≥5 | / | / | / | / | / | / | / |
| Weight | [kg/m] | 6.20 | 7.20 | 10.20 | 13.20 | 17.80 | 21.20 | 16.50 | 19.70 | 23.50 | 44.60 |
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