JIN JU FENG

16 Years Manufacturing Experience

R25 R38 R51 self drilling anchor SDA bars for Underground Construction

Short Description:

The Self Drilling Anchor 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 system is mainly used in slope stabilization, tunneling pre-support, foundations with micro piles etc jobs, which is widely used in mining, tunneling, railway, metro construction etc projects.


Product Detail

Product Tags

The Self Drilling Anchor 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 system is mainly used in slope stabilization, tunneling pre-support, foundations with micro piles etc jobs, which is widely used in mining, tunneling, railway, metro construction etc projects.

R Thread size: R25,R32,R38,R51,
T Thread size: T30, T40, T52, T73, T76,T103, T127, T130

Thread standard: ISO10208/ISO1720

self drilling anchor SDA bars11

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.
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

Application

self drilling anchor SDA bars6
self drilling anchor SDA bars7

Packing & transport

self drilling anchor SDA bars8
self drilling anchor SDA bars10
self drilling anchor SDA bars9

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