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Quick Details

  • Standard: BS
  • Material: Q345 or Q235
  • Surface Treatment: Black/Paint/HDG
  • Tube Thickness: 2.5-3.2mm
  • function: mine roof support
  • length: all lengths
  • resin: no
  • plate: domed plate combi plate
  • driver: yes
  • ring diameter: 6.0mm-7.5mm
  • elongation: above 16%

Packaging & Delivery

Packaging Details: 100-150pcs/package

 m39 split set rock bolt


In 2012, we establish longterm cooperation relationship with Sandvik and produce MD bolt for the. MD bolt is combined with friction bolt and thread bar bolt, which is a patent product of Sandvik.Split set is rollformed into a C shape by high tensile steel band. One end tapered for easy insertion into a drill hole. The other end has a welded ring to hole the bearing plate.


Tonry split set is a product that designed by Tonry and focus on the oversea market. It has been manufactured for servial years and used in mines, tunnels, slops , or where reliable ground support is needed.


Nowadays, we have the most professional skills to produce the high quality split set(Friction Bolt) for the mining in the world. As the immediate frictional support, our friction bolt has been approved in many mines abroad.


Key Features: 

1. Rollformed from high strength steel band with one end tapered tip for easy insertion into a

    drill hole, the other end has a welded ring for holding the bearing plate.

2.Provide immediate ground support in radial and axial direction, not suitable for very

   soft  strata and permanent support. 

3.Fast and easy installation with hand held or mechanized bolting equipment.

4.No cement grout and resin cartridge needed.

5.Available with both black and galvanized.




33mm BoltMinimumTypical
Yield strength415Mpa80KN510Mpa100KN
Ultimate Tensile Strength of Tube510Mpa100KN610Mpa120KN
Bolt Diameter33mm
Drill Hole Diameter30mm min./32mm max.
Elongation≥ 16%
Mass per Meter1.68kg
Cross Section Area204mm2
Bearing Plate150mm*150mm*4mm
39mm BoltMinimumTypical
Yield strength415Mpa90KN510Mpa115KN
Ultimate Tensile Strength of Tube510Mpa115KN600Mpa135KN
Bolt Diameter39mm
Drill Hole Diameter35mm min./38mm max.
Elongation≥ 16%
Mass per Meter1.96kg
Cross Section Area225mm2
Bearing Plate150mm*150mm*4(5)mm
42mm BoltMinimumTypical
Yield strength415Mpa100KN510Mpa140KN
Ultimate Tensile Strength of Tube510Mpa140KN600Mpa160KN
Bolt Diameter42mm
Drill Hole Diameter38mm min./41mm max.
Elongation≥ 16%
Mass per Meter2.00kg
Cross Section Area300mm2
Bearing Plate150mm*150mm*5mm
47mm BoltMinimumTypical
Yield strength345Mpa120KN445Mpa160KN
Ultimate Tensile Strength of Tube460Mpa165KN510Mpa180KN
Bolt Diameter47mm
Drill Hole Diameter43mm min./45.5mm max.
Elongation≥ 16%
Mass per Meter2.87kg
Cross Section Area355mm2
Bearing Plate150mm*150mm*5(6)mm/combi plate

Black Steel:


Hot Dip Galvanized:




Cold Galvanized:



Test Lab:


How to work


1.The nature of the ground must be evaluated.


2.Drill a hole in the area according to bolt diameter, bolt length and drilling procedure as specified in the plan.


3.The hole should be drilled with the proper diameter bit as specified in plan.


4. The hole should be at least 150mm longer than the whole length of split set.


5.Aftern placing a plate onto the split set  tube(tapered end at front), drive the bolt into the hole by installation equipment until the plate is firmly against the rock surface.


6.Perpendicular installation bolts should be installed as near perpendicular to the rock surfaces as possible.


8.If insertion time is too fast(than normal),please check drill bit diameter, bolt length, operation of drilling, dust cleaning and insertion.


9.Keep hands away from all dangerous points, rotating and/or vibrating parts. Always wear and utilize proper safety gear and eye protection.


10.Pull tests should be performed to determine initial anchorage of split setd.


Bearing Plate:


Plate SizeBearing Capacity(kn)Plate Size(mm)Bearing Capacity(kn)

































































Domed plate



Combi plate


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