How do You Know about Self-drilling Anchor Bars

Time:2023-10-27From:sinorock View:

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Thread

The self-drilling anchor bar's thread is designed as a through-body continuous thread, and this design is instrumental in realizing arbitrary cutting connections. This means that these threads run continuously along the entire length of the anchor bar, allowing for flexible and custom connections. The continuous thread design makes it easy for construction professionals to cut the anchor bar to the desired length while maintaining the integrity of the threaded connection. This convenience is a significant advantage in various construction scenarios, where adaptability is key.

One of the key aspects of the thread design is the ability to meet the diverse demands of customers. To address this, companies like Sinorock have developed and processed two main types of threads simultaneously: R-type and T-type threads.

R-type threads are designed with reference to the ISO 10208 standard. They are primarily suitable for small-diameter self-drilling anchor systems. The reference to this standard ensures that R-type threads adhere to recognized industry norms, providing consistency and reliability for smaller diameter anchor bolts.

T-type threads, on the other hand, are enterprise-standard threads designed with reference to the threads of fine-rolled threaded steel bars. These threads are full of teeth, ensuring a strong adhesion to the slurry. The robust connection formed by T-type threads enhances the overall strength of the anchoring system, making them ideal for more substantial construction applications.

Structure

At the core of Sinorock's anchor bar structure is the specially designed chamfer at the bar's end. This chamfer takes the form of a right angle combined with a beveled angle. This design serves multiple essential purposes in the construction process.

First and foremost, the right angle and beveled angle chamfer make the installation of the anchor bar remarkably convenient, especially when used with couplers. This streamlined installation process reduces the time and effort required for construction, contributing to overall project efficiency.

Another crucial advantage of this chamfer design is its positive impact on sealing effectiveness. By incorporating a sealing ring that fits snugly into the beveled angle, the risk of damage to the sealing ring during installation is minimized. This not only improves the sealing effect during construction but also enhances the long-term durability and reliability of the anchor system.

Furthermore, the structure of Sinorock's anchor bars, in combination with the coupler, enables the connection of anchor bar ends to each other. This feature significantly reduces the loss of force along the length of the anchor bar. The reduced force loss enhances the overall performance of the anchor system, ensuring that it can reliably meet the load-bearing requirements of the construction project.

Specification

Our independent research and development has a large diameter anchor rolling machine, that can process anchor bar diameter up to 200mm, and anchor bar tensile force from 200kN to 14000kN ranging from the customer construction of specifications and performance needs.

Type

In order to meet the customer's demand for products in different scenarios and with different service life, Sinorock has different series of self-drilling anchor system products to choose from, both stainless steel products suitable for corrosion-resistant geology and low carbon products with high impact requirements, both conventional products suitable for the mass market and more cost-effective economic products, so that the customers can choose according to their own needs.

Conclusion

Sinorock's commitment to innovative design ensures that its anchor bars are well-suited to the demands of modern construction projects. As a professional manufacturer of self-drilling anchor bolts, Sinorock's team boasts years of experience in providing complete geotechnical engineering services. If you have any needs or questions about self-drilling anchor systems, please feel free to contact us at sinorock@sinorockco.com for expert guidance and top-quality anchor bolt solutions.

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Introduction

Functions:
R thread self drilling anchor bolt system is an advanced system which can ensure the anchoring effect for complex ground conditions. It can be integrated with the functions of drilling, grouting and anchoring.

Conditions:
• Tunneling
• Mining
• Slope Stabilization
• Foundation Support








Features and advantages:
1. Safe, reliable, and time saving.
2. Simple installation & operation.
3. Choice of drill bits for different ground conditions.
4. Grouting works synchronize with drilling or after drilling. Grout can fill fractures effectively.
5. Anchor bars can be cut and lengthened on request, applying to narrow spaces.
6. It provides higher bonding stress than smooth steel pipe depending on continuous wave thread.

Construction Process:

• R25
• R32
• R38
• R51

Technical Data:

    Hollow Bar

Size Outer Dia.
(mm) Ultimate Load
(kN) Yield Load
(kN) Weight
(Kg/m) SER25N 25 200 150 2.35

    Coupler

Size Outer Dia.
(mm) Length
(mm) Weight
(Kg/pc) Note SSR25 36 150 0.66 With sealing structure SER25 36 150 0.68 Without sealing structure

    Hex Nut

Size Key Size
(mm) Length
(mm) Weight
(Kg/pc) Note SSR25 41 30 0.20 Heat treatment SER25 41 35 0.23 Without heat treatment

    Domed Nut

Size Key Size
(mm) Length
(mm) Weight
(Kg/pc) Note SER25 41 40.5 0.31

Without h

eat treatment

    Domed Plate

Size Dimensions
(mm) Thickness
(mm) Hole Dia.
(mm) Weight
(Kg/pc) SER25 150×150 8 30 1.40 150×150 5 28 0.85 200×200 10 32 3.20     

    Drill Bit

Size Outer Dia.
(mm) Application Range (Advice) EX Sand, fills, gravel SSR25/42 42 SSR25/51 51 EXX Softer sedimentary rocks such as marls, mudstones, siltstone SSR25/42 42 SSR25/51 51 ES-F Gravel, soft rock SSR25/42 42 SSR25/51 57.5 ESS-F Weathered rock, stone walls, rubble SSR25/42 42 SSR25/51 51 EY Competent ground, strong rock SSR25/51 51 Technical Data:

    Hollow Anchor Bar

Size Outer Dia.
(mm) Ultimate Load
(kN) Yield Load
(kN) Weight
(Kg/m) SSR32L 32 210 160 2.83 SSR32N 32 280 230 3.50 SSR32S 32 360 280 4.00 SER32L 32 210 160 2.60 SER32N 32 280 230 2.95 SER32S 32 360 280 3.50 SER32S1 32 405 320 4.00 SCR32L1 32 250 190 2.60 SCR32N 32 280 230 2.83

    Coupler

Size Outer Dia.
(mm) Length
(mm) Weight
(Kg/pc) Note SSR32 42 145 0.79 With sealing structure 42 160 0.86 42 190 1.00 SER32 42 145 0.77 Without sealing structure 42 160 0.84 42 190 1.00

    Hex Nut

Size Key Size
(mm) Length
(mm) Weight
(Kg/pc) Note SSR32 46 45 0.37 Heat treatment 46 55 0.46 SER32 46 45 0.37 Without heat treatment

    Domed Nut

Size Key Size
(mm) Length
(mm) Weight
(Kg/pc) Note SSR32 46 45 0.38

Heat treatment

SER32 46 45 0.38

Without heat treatment

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    Domed Plate

Size Dimensions
(mm) Thickness
(mm) Hole Dia.
(mm) Weight
(Kg/pc) SER32 150×150 8 35 1.30 150×150 10 35 1.70 175×175 8 35 1.90 200×200 8 35 2.60 200×200 10 34 2.94 200×200 12 35 3.52

    Flat Plate

Size Dimensions
(mm) Thickness
(mm) Hole Dia.
(mm) Weight
(Kg/pc) SER32 95×95 25 35 1.60 120×120 30 35 3.20 150×150 8 35 1.30 200×200 10 35 3.06

    Centralizer

Size Outer Dia.
(mm) Length
(mm) Weight
(Kg/pc) SER32 72 30 0.27        

    Drill Bit

Size Outer Dia.
(mm) Application Range (Advice) EX Sand, fills, gravel SSR32/42 42 SSR32/51 51 SSR32/76 76 EX(Venturi) SSR32/64 64 SSR32/76 76 EXX Softer sedimentary rocks such as marls, mudstones, siltstone SSR32/42 42 SSR32/51 51 SSR32/64 64 SSR32/76 76 EXX(Venturi) SSR32/76 76 Clay Bit Clay, soft soil, marls, loose sand or gravel SSR32/76 76 SSR32/90 90 SSR32/100 100 SSR32/110 110 ES-F Gravel, soft rock SSR32/42 42 SSR32/51 51 SSR32/64 64 SSR32/76 76 ESS-F Weathered rock, stone walls, rubble SSR32/42 42 SSR32/51 51 SSR32/64 64 SSR32/76 76 EYY Competent ground, strong rock SSR32/51 51 SSR32/76 76 EY Chalk, gravel SSR32/51 51 SSR32/76 76 EC Chalks, marls, fills, competent ground SSR32/51 51 ECC Chalks, marls, fills, competent ground SSR32/51 51 Technical Data:

    Hollow Anchor Bar

Size Outer Dia.
(mm) Ultimate Load
(kN) Yield Load
(kN) Weight
(Kg/m) SSR38N 38 500 400 5.50 SER38N 38 500 400 4.95 SER38S 38 550 450 5.90

    Coupler

Size Outer Dia.
(mm) Length
(mm) Weight
(Kg/pc) Note SSR38 51 180 1.33 With sealing structure 51 200 1.50 51 220 1.67 SER38 51 180 1.38 Without sealing structure 51 200 1.55 51 220 1.68

    Hex Nut

Size Key Size
(mm) Length
(mm) Weight
(Kg/pc) Note SSR38 50 60 0.47 Heat treatment 50 70 0.55 SER38 50 60 0.47 Without heat treatment

    Domed Nut

Size Key Size
(mm) Length
(mm) Weight
(Kg/pc) Note SSR38 52 60 0.61 Heat treatment SER38 52 60 0.61 Without heat treatment

    Domed Plate

Size Dimensions
(mm) Thickness
(mm) Hole Dia.
(mm) Weight
(Kg/pc) SER38 150×150 8 41 1.38 200×200 12 41 3.60

    Flat Plate

Size Dimensions
(mm) Thickness
(mm) Hole Dia.
(mm) Weight
(Kg/pc) SER38 140×140 35 41 5.00 150×150 25 41 4.10 200×200 12 41 3.67

    Centralizer

Size Outer Dia.
(mm) Length
(mm) Weight
(Kg/pc) SER38 78 30 0.28         

    Drill Bit

Size Outer Dia.
(mm) Application Range (Advice) EX Sand, fills, gravel SSR38/76 76 SSR38/90 90 SSR38/100 100 EX(Venturi) SSR38/76 76 SSR38/90 90 EXX　　 Softer sedimentary rocks such as marls, mudstones, siltstone SSR38/76 76 SSR38/90 90 SSR38/100 100 SSR38/115 115 SSR38/130 130 EXX(Venturi)　 SSR38/56 56 SSR38/76 76 SSR38/90 90 Clay Bit　　 Clay, soft soil, marls, loose sand or gravel SSR38/90 90 SSR38/100 100 SSR38/110 110 SSR38/130 130 SSR38/150 150 ES-F　　 Gravel, soft rock SSR38/76 76 SSR38/90 90 SSR38/115 115 ESS-F　　 Weathered rock, stone walls, rubble SSR38/76 76 SSR38/90 90 SSR38/115 115 EYY　　 Competent ground, strong rock SSR38/76 76 SSR38/90 90 EY　　 Competent ground, strong rock SSR38/76 76 SSR38/90 90 EC　　 Chalks, marls, fills, competent ground SSR38/76 76 ECC　　 Chalks, marls, fills, competent ground SSR38/76 76 XX　　 Sand, clay, fills, gravel SSR38/110 110 SSR38/130 130 SSR38/150 150 ESS-D Weathered rock, stone walls, rubble SSR38/100 100 SSR38/115 115 Technical Data:

    Hollow Anchor Bar

Size Outer Dia.
(mm) Ultimate Load
(kN) Yield Load
(kN) Weight
(Kg/m) SSR51L 51 580 450 6.75 SSR51N 51 800 630 9.00 SER51L 51 550 450 6.20 SER51L1 51 660 540 6.75 SER51N 51 800 630 8.20 SCR51S 51 925 740 9.25

    Coupler

Size Outer Dia.
(mm) Length
(mm) Weight
(Kg/pc) Note SSR51 63 200 1.85 With sealing structure 63 220 2.00 SER51 63 200 1.84 Without sealing structure 63 220 2.03

    Hex Nut

Size Key Size
(mm) Length
(mm) Weight
(Kg/pc) Note SSR51 75 70 1.53 Heat treatment 75 80 1.84 SER51 75 70 1.53 Without heat treatment

    Domed Nut

Size Key Size
(mm) Length
(mm) Weight
(Kg/pc)

Note

SSR51 75 70 1.60 Heat treatment 75 80 1.92 SER51 75 70 1.60 Without heat treatment

    Domed Plate

Size Dimensions
(mm) Thickness
(mm) Hole Dia.
(mm) Weight
(Kg/pc) SER51 200×200 15 55 4.70

    Flat Plate

Size Dimensions
(mm) Thickness
(mm) Hole Dia.
(mm) Weight
(Kg/pc) SER51 150×150 40 56 6.20 180×180 45 56 10.50 200×200 30 60 8.72 250×250 40 60 18.90

    Centralizer

Size Outer Dia.
(mm) Length
(mm) Weight
(Kg/pc) SER51 91 30 0.30      

    Drill Bit

Size Outer Dia.
(mm) Application Range (Advice) EX Sand, fills, gravel SSR51/90 90 SSR51/100 100 SSR51/110 110 SSR51/115 115 SSR51/130 130 SSR51/150 150 EXX Softer sedimentary rocks such as marls, mudstones, siltstone SSR51/76 76 SSR51/90 90 SSR51/100 100 SSR51/110 110 SSR51/115 115 SSR51/130 130 SSR51/150 150 EXX(Venturi) SSR51/115 115 SSR51/140 140 Clay Bit Clay, soft soil, marls, loose sand or gravel SSR51/76 76 SSR51/90 90 SSR51/115 115 SSR51/130 130 SSR51/150 150 SSR51/175 175 ES-F Gravel, soft rock SSR51/76 76 SSR51/100 100 SSR51/115 115 SSR51/130 130 ESS-F Weathered rock, stone walls, rubble SSR51/76 76 SSR51/100 100 SSR51/110 110 SSR51/115 115 SSR51/130 130 SSR51/150 150 EY Chalk, gravel SSR51/76 76 EC Chalks, marls, fills, competent ground SSR51/115 115 XX Sand, clay, fills, gravel SSR51/130 130 SSR51/150 150 SSR51/170 170 SSR51/200 200 ES-D Gravel, soft rock SSR51/115 115 ESS-D Weathered rock, stone walls, rubble SSR51/115 115

R thread self drilling anchor bolt system is composed by hollow rock bolt , anchor nut, anchor plate, anchor coupler, drill bit, centralizer, and the hollow anchor bars can be cut and lengthened by coupling on request.R thread self drilling anchor bolt system is an advanced system which can ensure the anchoring effect for complex ground conditions. It can be integrated with the functions of drilling, grouting and anchoring.• Tunneling• Mining• Slope Stabilization• Foundation Support1. Safe, reliable, and time saving.2. Simple installation & operation.3. Choice of drill bits for different ground conditions.4. Grouting works synchronize with drilling or after drilling. Grout can fill fractures effectively.5. Anchor bars can be cut and lengthened on request, applying to narrow spaces.6. It provides higher bonding stress than smooth steel pipe depending on continuous wave thread.

The company is the world’s best R Thread Self Drilling Anchor Bars supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.