MF47 Friction Bolts(Split set bolt)

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.