Basic Info.
Model NO.
R25 R32 R38 R51 T76
Usage
Machinery Industry, Construction & Decoration, Special Purpose, Reinforced Rock Formation Stability
Section Shape
Round
Tolerance
+0/-0.2mm
Heat Treatment
Annealed
Yield Strength
>125kn
Tensile Strength
>180kn
Transport Package
Standard Seaworthy Packing
Trademark
YF Steel
Origin
Tianjin, China
Production Capacity
10000tons/Month
Product Description
Hollow Anchor Rod
Product Introduction Hollow anchor bar means a rod that transfers the structures or geotechnical load to a stable rock formations, anchor bolt consists of bar, drill bit, coupling, plate, grouting stopper and nut. Widely used as an efficient anchoring means, in tunnel pre-support, slope, coast, mine, water conservancy projects, building foundation, roadbed reinforcement and geological diseases treatment such as landslip, crack, sink age. It's irreplaceable in narrow construction environment. Hollow anchor bar is made of seamless tube with high strength.
Features of Hollow Grouting Anchor Bar:
• Fits standard Boomer, ROC and Mustang rigs.
• Particularly suitable for difficult ground conditions.
• A high rate of installation since drilling, placing and grouting can be performed in one single operation.
• Self drilling system eliminates the requirement for a cased borehole.
• Installation with simultaneous drilling and grouting possible.
• Easy installation in all directions, also upwards.
• Suitable for working in limited space, height and in areas of difficult access.
• Simple post grouting system.
• Hot-dipped galvanizing for corrosion protection
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.
Product Specification Anchor Bar
| R25N | R32N | R32S | R38N | R51L | R51N | T76N | T76S | |
| Outside diameter (mm) | 25 | 32 | 32 | 38 | 51 | 51 | 76 | 76 |
| Internal diameter (mm) | 14 | 19 | 16 | 19 | 36 | 33 | 52 | 45 |
| Ultimate load capacity (KN) | 200 | 280 | 360 | 500 | 550 | 800 | 1600 | 1900 |
| Yield load capacity (KN) | 150 | 230 | 280 | 400 | 450 | 630 | 1200 | 1500 |
| Tensile strength, Rp0.2 (N/mm2) | 800 | 800 | 800 | 800 | 800 | 800 | 800 | 800 |
| Yield strength, Rp0.2 (N/mm2) | 650 | 650 | 650 | 650 | 650 | 650 | 650 | 650 |
| Weight (Kg/m) | 2.3 | 3.2 | 3.6 | 5.5 | 6.5 | 8.0 | 16.0 | 19.7 |
| Thread type (left-hand) | ISO 10208 | ISO 1720 | MAI T76 Standard | |||||
| Steel grade | En10083-1 (Alloy structure steel) | |||||||
| Compared to carbon steel, alloy structure steel has high anti-corrosion capacity and high mechanical. | ||||||||
Thread size: R25, R32, R38, R51, T76.
Thread standard: ISO10208, ISO1720 etc.
Anchor Plate
| R25N | R32N | R32S | R38N | R51L | R51N | T76N | T76S | |
| Dimention (mm) | 150*150 | 200*200 | 200*200 | 200*200 | 200*200 | 250*250 | 250*250 | 250*250 |
| Thickness (mm) | 8 | 10 | 12 | 12 | 20 | 40 | 40 | 40 |
| Hole diameter (mm) | 30 | 35 | 35 | 41 | 60 | 60 | 80 | 80 |
| Weight (KG/PC) | 1.4 | 3 | 3.7 | 3.6 | 8.8 | 18.5 | 18 | 18 |
| Cold deformed with geometry | ||||||||
| R25N | R32N | R32S | R38N | R51L | R51N | T76N | T76S | |
| Outside diameter (mm) | 35 | 42 | 42 | 52 | 63 | 63 | 95 | 95 |
| Length (mm) | 120 | 145 | 160or190 | 180 | 180 | 200 | 200 | 200 |
| Weight | 0.45 | 0.7 | 0.75 | 1.4 | 1.7 | 1.9 | 6.4 | 6.4 |
| Machined steel coupling middle stop | ||||||||
The coupling enables direct end-to-end energy transmission between each bar, reducing losses and ensuring maximum percussive engergy at the drill bit.
Drill Bit
| R25N | R32N | R32S | R38N | R51L | R51N | T76N | T76S | |
| Diameter (mm) | 41,51 | 51,76,90 | 90,100,110,115,130 | 130,150,160,180,200 | ||||
| Hardened cross bit (EX) | Hardened cross bit for loose to medium dense condition with small boulders. | |||||||
| Tungsten cross bit (EXX) | TC cross bit for soft to medium rock for mations | |||||||
| Hardened button bit (ES) | Hardened buuton bit for unconsolidated rock with boulders. | |||||||
| Tungsten carbon button bit (ESS) | Button bit with TC inserts for medium rock for formations. | |||||||
| Hardened arch bit (EC) | Hardened drill bit with optimized geometry for uncon solid dated soil with small boulders. | |||||||
| Tungsten carbon arch bit (ECC) | TC drill bit with optimized geometry for soft to medium rock formations. | |||||||
| Hardened drop center bit (EY) | Hardened cross bit for loose to medium dense ground conditions | |||||||
| TC drop center bit (EY) | TC drill bit for soft to medium rock formations. | |||||||
| Casting clay bit (EW) | Casting clay bit with optimized geometry for very soft to soft caly. | |||||||
| Machined steel bit or Casring steel bit | ||||||||
Choose suitable bits according to different soil type.
Anchor Nut
| R25N | R32N | R32S | R38N | R51L | R51N | T76N | T76S | |
| Key size (mm) | 41 | 46 | 46 | 50 | 75 | 75 | 100 | 100 |
| Length (mm) | 135 | 45 | 45 | 55 | 70 | 70 | 80 | 80 |
| Weight (kg/pc) | 0.25 | 0.35 | 0.35 | 0.5 | 1.55 | 1.55 | 3.6 | 3.6 |
| Machined steel nut or casting steel nut | ||||||||
All nuts exceed the ultimate strength of the rod.
T-Thread Anchor Rod Technial Data
| Bar Type | Outside Diameter (mm) | Inside Diameter (mm) | Cross section (mm2) | Ultimate Load KN | Yield Point KN | Weight (kg/m) | Thread Left/ Right Hand |
| 30/11 | 30 | 11 | 446 | 320 | 260 | 3.3 | Lift or right |
| 30/14 | 30 | 14 | 395 | 260 | 220 | 2.9 | Lift or right |
| 30/16 | 30 | 16 | 382 | 220 | 180 | 2.7 | Lift or right |
| 40/16 | 40 | 16 | 879 | 660 | 525 | 7.0 | Lift or right |
| 40/20 | 40 | 20 | 726 | 539 | 430 | 5.6 | Lift or right |
| 52/26 | 52 | 26 | 1337 | 929 | 730 | 10.0 | Lift or right |
| 73/53 | 73 | 53 | 1160 | 1630 | 970 | 12.3 | Lift or right |
| 73/56 | 73 | 56 | 1094 | 1414 | 785 | 11.1 | Lift or right |
| 73/45 | 73 | 45 | 2265 | 1630 | 1180 | 17.8 | Lift or right |
Thread size: T30, T40, T52, T73, T103, T127, T130.
Thread standard: ISO10208, ISO1720 etc.
Product And Factory Display
Product Test 
Technology Process
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 projects.
1. Connect the alloy drill and anchor rod one end, on the other end, connect the drill sleeve and shank adapter, then connect the drilling rig or hand-held drill. Then start drilling, fill the cooling water while drilling.( If you want to lengthen the anchor rod, can connect the coupling, and then drilling)
2. Take down the drill, put the stop-grouting plug into the rod, and insert it to the hole, then ready to grout. Special circumstances like surrounding rock grouting tension is over or surrounding rock is too broken, can use anchor agent to seal the hole.
3. Connect quick grouting coupling and anchor rod end, connect other end of grouting machine.
4. Start grouting, when grouting full and reach design value then power off. Grouting pressure according to the design parameters and grouting machine performance determine, Cement/sand reference values is 1:0 ~ 1:1, water/cement reference value is 0.45:1 ~ 0.5:1.
5. Install anchor plate and nuts, and tighten nuts.
Application:
During the constructions of underground works, it is very common to encounter soft rock, fractured zone and large deformation due to high ground stress. In the case of serious collapsing, extra-long anchor is needed instead of ordinary one.
Packaging And Transportation
The packaging is packaged in tarpaulins and wooden boxes to ensure that it will not rust and corrode in the process of encountering water.
FAQ
Q1:Can you send samples?
A:Of course, we can provide customers with free samples and express shipping service to all over of the world.
Q2:What product information do I need to provide?
A:Please kindly provide the grade, width, thickness, surface treatment requirement should you have and quantities you need to purchase.
Q3:It's my first time to import steel products, can you help me with it?
A:Sure,we have agent to arrange the shipment, we will do it together with you.
Q4:What ports of shipment are there?
A:Under normal circumstances, we ship from Shanghai, Tianjin, Qingdao, Ningbo ports, you can specify other ports according to your needs.
Q5:What about product prices information?
A:Prices various according to periodic price changes of raw materials.
Q6:What is your terms of payment ?
A:Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shipment or based on BL copy or LC at sight.
Q7:Do you provide custom made Products service?
A: Yes,if you have your own design , we can produce according to your specification and drawing.
Q8:What are the certifications for your products?
A:We have ISO 9001, MTC, third parties' inspections are all available such SGS, BV ect.
Q9:How long does your delivery time take?
A:In general, our delivery time is within 7-15 days, and may be longer if the quantity is extremely large or special circumstances occur.
Q10: How many countries you already exported to?
A:We have exported to America, Canada, Brazil, Chile, Colombia, Russia, Ukraine, Thailand, Myanmar, Vietnam, India, Kenya, Ghana,somalia and other African countries.Our export experience is rich, we familiar with different market demands, can help customers avoid a lot of trouble.
Q11:Can I go to your factory to visit?
A:Of course, we welcome customers from all over the world to visit our factory.
Q12:Does the product have quality inspection before loading?
A:Of course, all our products are strictly tested for quality before packaging, and unqualified products will be destroyed and customers can appoint third parties to inspect the products before loading too.
Q13:How to pack the products?
A: Standard export sea-worthy packaging, the inner layer has a waterproof paper outer layer with iron packaging and is fixed with a fumigation wooden pallet. It can effectively protect products from corrosion and various climate changes during ocean transportation.
Q14:What is your working time?
A:In general, our online service time is Beijing time: 8:00-22:00, after 22:00, we will reply to your inquiry in the coming working day.