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-Friction bolt -33-600mm reference to the AS/NZS1594 / ASTM A1011 standard.
-Thermal diffusion galvanizing is available for the Friction Bolt.
-The friction bolt undergoes very stringent tensile testing to ensure product quality.
-Provide customers with a pull test for friction bolts after installation.
Friction Bolt -33-600mm Functions
Friction Bolt -33-600mm is a frictional ground support system. When a friction bolt is inserted into drilling hole with a smaller diameter, the slot partially closes and bolt diameter is compressed, which creates radial forces on rock roof surface along the whole length and firmly holds the rock.
Friction Bolt -33-600mm Features&Advantages
Made from high strength steel band
Immediate frictional Support in axial and radial
Independent supporting without plate
Easy for installation
Simple design,cost saving
Available in black,cold galvanizing or hot dip galvanized
Friction Bolt -33-600mm Mechanical Properties
| Technical Data | TRFB33 | TRFB39 | TRFB42 | TRFB47 | |
| Drill hole diameter (mm) | 30-32 | 35-38 | 38-40 | 43-45.5 | |
| Min.Yield strength (kN) | 80 | 90 | 100 | 120 | 135 |
| Min.Tensile strength (kN) | 100 | 120 | 132 | 165 | 180 |
| Typ.Tensile strength (kN) | 120 | 130 | 150 | 180 | 200 |
| Elongation (A%) | ≥20 | ≥20 | ≥20 | ≥20 | |
| Typ.Anchorage (ton/m) | 4-6 | 4-7 | 5-8 | 6-10 | |
| Bearing plate (mm) | 150x150x4 | 150x150x4 | 150x150x4.5 | 150x150x5 | |
Friction Bolt -33-600mm Accessories
Bearing plate,Driver,Pull collar.
Friction Bolt -33-600mm Length & Package
Length:450-3000mm as specified
Package:100pcs — 300pcs each bundle as specified
Friction Bolt -33-600mm Applications
Mines
Tunnels
Slopes
Places where need ground support
How to work
Assess the ground conditions thoroughly before installation.
Select the appropriate drill bit and bore a hole to suit the diameter and length of the friction bolt, ensuring the hole is at least 150mm longer than the bolt.
Affix a plate to the friction bolt, positioning the dome against the ring and the tapered end forward.
Install friction bolts perpendicular to the rock surface for optimal effectiveness.
Insert the driver dolly into the bolt and drive it into the hole until the plate presses firmly against the rock.
Avoid hammering the friction bolt once the plate is securely attached to the rock to prevent damage to the bolt's end.
Conduct pull tests to verify the initial anchorage strength of the friction bolts post-installation.
