MF47 Friction Bolts(Split set bolt)

Mining friction bolts also called Split Set Stabilizer, Friction Bolts Split Sets, is an indispensable advanced material for underground mining support.

MF47 Friction Bolts is a very specific support product, and it is an advanced material used for the support of the roof of the underground copper or gold mining and other projects.

Product Description


MF47 Friction Bolts are rock bolts with only 2 parts, a tube and matching domed bearing plate. The high strength steel tube is slotted along its length. One end is tapered for easy insertion into a drill hole and the other has a welded ring flange to hold the bearing plate.

How do mining friction bolts work?

  • With the bearing plate in place, the tube is driven into a slightly smaller hole, using the same standard percussion drill that made the hole.    


  • As the tube of the rock bolt slides into place, the full length of the slot narrows, causing radial pressure to be exerted against the rock over its full contact length.

  • Underground mining friction bolt is mainly used to establish ground support when hand-held mining operations are required. 

Mining friction bolts advantages:

Our MF47 Split Set Bolt was made by high strength steel strip which special refined with very low level of Si & P in chemical components, it will make the bolt in perfect performance of supporting rocks, and help to have a good quality in galvanizing. 

The 47mm friction bolt is suitable for installation with the handheld rock drilling machine (plug/drifting).

Meanwhile, with our advanced PLC-controled auto welder, the bolt will has a very good performance when it is inserted in the rocks.

DimensionsPhysical PropertiesTechnical Data
Bolt Diameter A47mmYield StrengthMin. 345 Mpa (120KN)Recommended Normal Bit Size41-45mm
Bolt Length B0.9-3.0mTypical 445Mpa(150KN)
Taper End Diameter C38mmTube Ultimate Tensile StrengthMin. 470 Mpa (160KN)Typical Breaking Capacity178KN
Taper Slot Wide D2mmTypical 530Mpa(180KN)
Taper Length E100mmMass per Meter2.71 KgsMin. Breaking Capacity133KN
Bolt Slot Wide F25mm
Ring Location G8mmCross Section Area345 mm²Recommended Initial Anchorage6-10 Tons               (53-89 KN)
Material Guage H3/3.2mm
Ring Wire Guage I8mmHole Diameter Range43-45.5mmUltimate Axial StrainTypical 21% (Thk<16mm)
Ring Open Gap J6-7mm


MF47Friction Bolts can be load tested by fitting a special ring to the bolt prior to its installation.  Pull tests can then be conducted with a hollow ram hydraulic jack. Further corrosion protection can be provided by hot dip galvanizing.

The same as the Self-drilling Anchor Bolt the surface treatment methods can be hot-dip galvanized, electro-galvanized or surface epoxy coating, and all need to be used with Volcano Plate.

Bolt DescriptionDiameterLengthSurface FinishWeightPacking
Friction Bolts MF47-90047900Untreated2.5200
Friction Bolts MF47-1800471800Untreated5.1200
Friction Bolts MF47-2100472100Untreated6.1200
Friction Boltst MF47-2400472400Untreated6.7200
Friction Bolts MF47-3000473000Untreated8.6200
Friction Bolts MF47-900 HDG47900Hot Dip Galvanized2.6200
Friction Bolts MF47-1800 HDG471800Hot Dip Galvanized5.5200
Friction Bolts MF47-2100 HDG472100Hot Dip Galvanized6.4200
Friction Bolts MF47-2400 HDG472400Hot Dip Galvanized7.1200
Friction Bolts MF47-3000 HDG473000Hot Dip Galvanized9200


The JIUFU 47mm Underground Mine Friction Bolts is manufactured from high strength steel tube which has a slot along its entire length. A ring or collar is welded on the outer end to hold a domed plate to the rock surface.

MF47 Friction Bolts(Split set bolt)


Mining Friction Bolts Features

1. The raw material is made of high-strength alloy steel strip.

2. The installation is the simple.

3. No anchoring agent is required.

4. The friction strength between the bolt and the rock is large.

5. It has high shear and tensile strength.

6. Equipped with a high-strength plate.

If you are looking for wholesale mining friction bolts from trusted supplier, please feel free to contact us!