hollow anchor bar
Thread:R25
Outer Dia.:25mm
Inner Dia.:14mm
Weight:2.3kg/m
Surface treatment:Epoxy Coating or Hot-dipped Galvanization
Steel grade:42CrMo
Category：
Rock Bolt
Keywords：
Rock Bolt
Description
The rolling process enhances the yield strength of the steel. The fully threaded hollow anchor bar allows drilling using a sacrificial drill bit at one end and another end to connect to the standard drill tool that works simultaneously for drilling and grouting. Full threading length of SDA makes it more beneficial to grate bonding to grout and tube and enable for drill rig connections and couplings.
Application
Slope stabilization
Self-Drilling Anchors are very suitable for weathered or un-consolidated rock stabilization. This technique is a more superior form of stabilization because the SDA technique is a relatively easy and fast method of installation compared to the outdated methods.
Foundations with micro piles
SDAs can be used like monopoles and micropile types because these are drilled piles composed of steel reinforcement with injected grout. These anchors are used like micropile type to stabilize the ground and related foundation problems. These anchors are suitable for tension and compression loads at varying ground conditions.
Tunneling
Self-drilling anchors are most suitable for the stabilization of tunnel strengthening works. Mostly for the soft rock and overburden soil conditions, the SDA’s are apt for rooftop protection.
Specification
NO. | Surface | Outer Dia. | Inner Dia. | Weight | Steel Type | Thread Type | Ultimate Load | Yield Load | Part Number |
1 | Epoxy Coating or Hot-dipped Galvanization | 25 | 14 | 2.30 | EN10083-1=4140=42CrMo | L/R | 200 | 150 | R25N-14 |
2 | 32 | 21 | 2.90 | 280 | 230 | R32N-21 | |||
3 | 18.5 | 3.40 | 280 | 230 | R32N-18.5 | ||||
4 | 16 | 3.60 | 360 | 280 | R32S-16 | ||||
5 | 15.5 | 3.80 | 405 | 350 | R32SS-15.5 | ||||
6 | 38 | 19 | 5.50 | 500 | 400 | R38N-19 | |||
7 | 21 | 4.80 | 500 | 400 | R38N-21 | ||||
8 | 51 | 36 | 7.00 | 550 | 450 | R51L-36 | |||
9 | 33 | 8.40 | 800 | 630 | R51N-33 | ||||
10 | 30 | 11 | 3.41 | 320 | 260 | T30-11 | |||
11 | 14 | 2.87 | 275 | 220 | T30-14 | ||||
12 | 16 | 2.70 | 245 | 190 | T30-16 | ||||
13 | 40 | 16 | 6.60 | 660 | 525 | T40-16 | |||
14 | 20 | 5.60 | 540 | 425 | T40-20 | ||||
15 | 52 | 26 | 9.87 | 925 | 730 | T52-26 | |||
16 | 64 | 44 | 11.60 | 1042 | 900 | RR64-44 | |||
17 | 73 | 53 | 14.10 | 1160 | 970 | T73-53 | |||
18 | 56 | 10.75 | 1035 | 830 | T73-56 | ||||
19 | 45 | 17.80 | 1585 | 1270 | T73-45 | ||||
20 | 35 | 21.20 | 1865 | 1430 | T73-35 | ||||
21 | 76 | 45 | 15.00 | 1900 | 1500 | T76S-45 | |||
22 | 51 | 19.70 | 1600 | 1200 | T76N-51 | ||||
23 | 54 | 15.80 | 1620 | 1220 | RR76-54 | ||||
24 | 103 | 78 | 25.30 | 2270 | 1800 | T103-78 | |||
25 | 51 | 44.60 | 3660 | 2670 | T103-51 | ||||
26 | 108 | 82 | 27.90 | 2580 | 1980 | RR108-82 | |||
27 | 111 | 82 | 25.00 | 2640 | 2000 | T111L-82 | |||
28 | 75 | 34.50 | 3650 | 2750 | T111N-75 | ||||
29 | 127 | 111 | 28.90 | 2320 | 2030 | T127-111 | |||
30 | 130 | 60 | 75.00 | 7940 | 5250 | T130-60 |
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APPLICATION
The company has established long-term strategic cooperative relations with Shenhuo Group and many other enterprises, scientific research institutions and equipment enterprises. The company integrates resources, pays attention to product technology research and development, and has obtained 1 invention patent and 11 utility model patents. The company's main products are: all kinds of geological exploration, coal mining drilling for drill pipe, diamond bit, cutting teeth, drill drill, air drill, coal rock drill and fishing tools and other supporting products. Among them, the H22 drill rod repair equipment developed by the company solves the problem of drill rod damage repair work to fill the gap in the market.
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