Thank you very much for your sincere service. The quality of your products has always been very good. We are very relieved and hope to have more cooperation in the future.
    Thank you for your products. Your products are of good quality and considerate service. We are very confident and willing to cooperate with you. We hope there will be opportunities for cooperation with other products in the future.
Contact Person : Anne
Phone Number : +8618963570880
Whatsapp : +8618963570880

High Strength Seamless Steel Pipes 40mm Large Bearing Hollow Grouting Anchor Rod

Place of Origin China
Brand Name TONGMAO
Certification ISO9001 MTC
Model Number Steel Pipes
Minimum Order Quantity 5tons
Price US $1,000-3,000/ Ton
Packaging Details Standard Packing
Delivery Time 7-15days
Supply Ability 1000tons/year

Contact me for free samples and coupons.

Whatsapp:0086 18588475571

Wechat: 0086 18588475571

Skype: sales10@aixton.com

If you have any concern, we provide 24-hour online help.

Product Details
Material Carbon Steel, Alloy Steel Model NO. Hollow Bolts
Application Surrounding Rock System Shoring And Supporting Specification OD:20-40mm
Tolerance +0/-0.2mm Test Ultrasonic Test
High Light

High Strength Seamless Steel Pipes


40mm Seamless Steel Pipes Rod


Hollow Grouting Anchor Rod

Leave a Message
Product Description

High Strength and Large Bearing Capacity Skz Series Hollow Grouting Anchor Rod for Coal Mine

High Strength Seamless Steel Pipes 40mm Large Bearing Hollow Grouting Anchor Rod 0

Product Description:

Product Name Hollow bolts / Rock bolts / Hollow grouting anchor rod / grouted hollow anchor bar
Standards GB1499.2-2007 GB 50086-2015 TB/T 3209-2008
Grades Carbon 45#, sae1045, aisi1045
Alloy 40Cr, JIS SCr440, ASTM 5140, ISO 41Cr4
Certificate We are SGS approved enterprise, we issue MTC and be responsible for the quality.
Outside diameter 25mm, 25.4mm, 28mm, 28.3mm, 30mm, 32mm, or as per required
Thread standard ISO
Tolerance for OD +0mm/-0.2mm
Length 4-12m fixed length, or as per the required
Surface treatment Black / oiled, or as per required.
Heat treatment Annealed
Test Ultrasonic test
Packing Wrapped by steel strips, wrapped by steel strips
Application Surrounding rock system shoring and supporting
Shipping term In bulk / FCL / LCL, partial shipment allowed
Shipping port Qingdao, or Tianjin port
Third party inspection Acceptable
Trade term CIF, CFR, FOB, EXW
Delivery time Within 7 days for stocks supply.
Paying term 30%TT + 70% TT against copy of documents, or 30%TT + 70% LC.


1. Immediately initial stage support for rock, control the surrounding rock being out of shape, guarantee the stability of surrounding rock.

2. Compared with solid rebar bolts, medium hollow design, makes the hollow bolts get the function of grouting pipe, it well avoids the waste and running off of mortar when grouting pipe pull out form the rock layer under traditional technology.

3. Mortar injecting well filled, what is more it can reaching goal of pressure mortar injection, finally the quality of project is improved.

4. Due to each accessories or parts effecting, the bolt neutral peculiarity is good. The mortar can fill every surface part of the hollow bolts, so the bolts get rid of being rusty, finally we get the goal of long term protection and supporting for rocks.

Installation Method:

  1. Using the jackdrill dig into the same depth of bolt length.
  2. Install the steel rising shell anchor head on the hollow bolt.
  3. Put hollow bolt into the ready hole.
  4. Install stopper mortar plug, base plate and nut on up side of hollow bolt.
  5. Reversal the bolt, and make anchor head' rising shell grasp well of hole.
  6. Fulfill the mortar.

Introduction of Hollow Grouting Anchor Cable:

Hollow grouting anchor cable is suitable for medium geological conditions, good surrounding rock permanent support, highway, railway, tunnel advanced support, slope support, foundation pit support and other projects.

Through the pressure grouting of hollow anchor body, the broken rock mass can be consolidated, the rock mass can be improved, and the good support purpose can be achieved.

By increasing the grouting pressure, the slurry can diffuse to the rock cracks around the borehole while filling the borehole and achieving full-length anchoring, which can bond and solidify the surrounding rock and realize deep hole anchoring.