R Thread Self Drilling Anchor Bar
R-SDA
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R Thread Self Drilling Anchor Bar
R thread self drilling anchor bar system is comprised of a hollow threaded anchor bar with a sacrificial drill bit that performs drilling, anchoring and grouting in a single operation.
self drilling anchor bar performs drilling, grouting & anchoring in one step. Easy to process and no risks of drill hole collapse. Suitable for unstable conditions.
Self drilling anchor bar Dimensions & mechanical properties
| R25N | R32L | R32N | R32S | R38N | R51L | R51N | |
| Outer diameter/mm | 25 | 32 | 32 | 32 | 38 | 51 | 51 |
| Inner diameter/mm | 14 | 22 | 21 | 17 | 32 | 38 | 33 |
| Ultimate load/kN | 200 | 260 | 280 | 400 | 500 | 550 | 800 |
| Yield load/kN | 150 | 200 | 230 | 360 | 400 | 450 | 630 |
Self drilling anchor bar Accessories
1.Anchor nut
| R25N | R32L | R32N | R32S | R38N | R51L | R51N | |
| Key size/mm | 41 | 46 | 46 | 46 | 50 | 75 | 75 |
| Length/mm | 35 | 45 | 45 | 65 | 60 | 70 | 70 |
2. Anchor plate
| R25N | R32L | R32N | R32S | R38N | R51L | R51N | |
| Dimestion/mm | 150x150 | 200x200 | 200x200 | 200x200 | 200x200 | 200x200 | 250x250 |
| Thickness/mm | 8 | 10 | 10 | 12 | 12 | 30 | 40 |
| Hole size/mm | 30 | 35 | 35 | 35 | 41 | 60 | 60 |
3.Anchor coupler
| R25N | R32L | R32N | R32S | R38N | R51L | R51N | |
| Outer size/mm | 36 | 42 | 42 | 42 | 52 | 63 | 63 |
| Length/mm | 150 | 145 | 160 | 190 | 220 | 200 | 220 |
4. Drill bit depends on the geological condition(Type EX, EXX, ES, ESS,EY,EYY)
Applications for self drilling anchor bar:
Pre-supporting, micropiling for foundation underpinning, slope anchorage, etc.
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