Friction Set

Friction Set
Friction Set

Description

A Friction Set is a tube used for temporary or permanent stabilisation of a rock mass and comprises an open steel tube and faceplate. 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. The tube is driven into a slightly smaller diameter hole, using the same standard percussion drill used to drill the hole. The slot narrows during insertion and then tries to return to its original shape causing radial pressure to be exerted against the rock over its full contact length. The units can be Zinc diffused for corrosion protection.

Benefits of the NCM Friction Set

  • Quick and easy installation
  • Provide immediate support
  • No grout or resin required
  • Quality manufacture

 

Uncoated Friction Set

Standard uncoated bolt

Zinc Coated Friction Set

Zinc diffused corrosion protection

 

The Friction Set can be provided in several configurations as per the table below:

Mechanical Specifications
Steel Grade Supraform S420MC / EN10149
Minimum Yield Strength 420 MPa
Minimum Tensile Strength 480 – 620 MPa
Minimum Elongation 16%
Wall Thickness SS-39: 2.3mm, SS-46: 3.2mm
Installation Specifications
Diameter Friction Set Minimum Hole Ø (mm) Maximum Hole Ø (mm)
33mm 29 32
35mm 31 34
39mm 35 38
46mm 42 45
Product Weight (Friction Set and Faceplate)
Length (m) SS-33 Weight (kg) SS-35 Weight (kg) SS-39 Weight (kg) SS-46 Weight (kg)
Black Zinc Diffused Black Zinc Diffused Black Zinc Diffused Black Zinc Diffused
0.9 2.1 2.1 2.1 2.1 2.4 2.5 3.3 3.5
1.0 2.2 2.3 2.2 2.3 2.6 2.7 3.6 3.7
1.2 2.5 2.6 2.5 2.6 2.9 3.0 4.2 4.3
1.5 2.9 3.0 2.9 3.0 3.4 3.6 5.0 5.2
1.8 3.4 3.5 3.4 3.5 4.0 4.2 5.8 6.1
2.1 3.8 3.9 3.8 3.9 4.5 4.7 6.7 7.0
2.4 4.2 4.4 4.2 4.4 5.0 5.3 7.5 7.9
2.7 4.6 4.8 4.6 4.8 5.6 5.9 8.3 8.7
3.0 5.1 5.3 5.1 5.3 6.1 6.4 9.2 9.6