HUNAN GOLDEN GLOBE I AND E OED CO.,LTD.
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Hollow Anchor R38N/21 Roof Self Drilling Rock Anchors for Soil Nailing Rock Bolts
Features:
Outer Diameter:38mm
Inner Diameter:21mm
Utimate Load:500KN
Yield load:400KN
Weight:4.8kg/meter
Application Area:
Water well-drilling
Quarry
Foundation piling
Geothermal drilling
Soil nailing
Tunnel support
Jet grouting
Micropile
Mining
Advantages and Characteristics:
1.No casings required, because anchor bars can be drilled into loose soils without needing casings to support the boreholes.
2.Fast drilling and installation, because drilling, installation and grouting are in a single operation.
3.Both rope threads and trapezoid threads are robust and ideal for rotary-percussive drilling and ensuring a high level of bond with the borehole gout.
4.The hollow core not only serves for flushing during drilling, but also for grouting after drilling. R32 mining roof support bar.
5.Continuous threads ensure the bars can be cut and coupled at any point, or extended.
6.Different anchor bits are available for different ground conditions.
7.Duplex anti-crossion prosess ,hot-dip galvanized and epoxy coating system.
Hollow anchor bar technical data:
| Size | O.D(mm) | I.D(mm) | Ultimate Load(KN) | Yield Load(KN) | Weight(kg/meter) |
| R25N-14 | 25.0 | 14.0 | 200 | 150 | 2.3 |
| R32L-22 | 32.0 | 22.0 | 220 | 180 | 2.8 |
| R32N-21 | 32.0 | 21.0 | 280 | 230 | 2.9 |
| R32N-18.5 | 32.0 | 18.5 | 280 | 230 | 3.4 |
| R32S-17.5 | 32.0 | 17.5 | 360 | 280 | 3.5 |
| R32S-15 | 32.0 | 15 | 360 | 280 | 4.1 |
| R38N-21 | 38.0 | 21.0 | 500 | 400 | 4.8 |
| R38N-19 | 38.0 | 19.0 | 500 | 400 | 5.5 |
| R51L-38 | 51.0 | 38.0 | 550 | 450 | 6.0 |
| R51L-36 | 51.0 | 36.0 | 550 | 450 | 7.6 |
| R51N-36 | 51.0 | 36.0 | 800 | 630 | 7.6 |
| R51N-33 | 51.0 | 33.0 | 800 | 630 | 8.4 |
| T76N-49 | 76.0 | 49.0 | 1600 | 1200 | 16.5 |
| T76S-45 | 76.0 | 45.0 | 1900 | 1500 | 19 |
| T30-11 | 30.0 | 11.0 | 320 | 260 | 3.3 |
| T30-14 | 30.0 | 14.0 | 275 | 220 | 2.9 |
| T40-16 | 40.0 | 16.0 | 660 | 525 | 7.1 |
| T40-20 | 40.0 | 20.0 | 540 | 425 | 5.6 |
| T52-26 | 52.0 | 26.0 | 930 | 730 | 10 |
| T73-56 | 73.0 | 56.0 | 1035 | 830 | 10.8 |
| T73-53 | 73.0 | 53.0 | 1160 | 970 | 14 |
| T73-45 | 73.0 | 45.0 | 1600 | 1270 | 17.5 |
| T103-78 | 103.0 | 78.0 | 2270 | 1800 | 25 |
| T103-51 | 103.0 | 51.0 | 3660 | 2670 | 44 |
| Steel grade | Acc. to EN10083-1 / EN10210-1 | ||||
| Thread direction | Left hand / Right hand | ||||
| Thread standard | ISO 10208 / ISO1720 / Other international standards | ||||