Conveyor Idler Roller | Belt Conveyor Roller for Mining and Bulk Material Handling
Conveyor Idler Roller | Belt Conveyor Roller for Mining and Bulk Material Handling
1.Technical Specifications
| Item | Specification |
| Product Type | Split Set Friction Rock Bolt / Friction Stabilizer |
| Outer Diameter | 42mm |
| Initial Anchorage Force | 3-7 tons |
| Ring Pull-Off Load | 8-10 tons |
| Tensile / Breaking Capacity | 12-13 tons |
| Available Lengths | 1200mm, 1500mm, 1800mm, 2000mm, 2500mm |
| Material Options | Q235, 16Mn, 20MnSi |
| Application | Mining, tunnel support, underground engineering, rock reinforcement |
2. Size Reference
| Outer Diameter | Weight | Bolt Length | Minimum Ultimate Tensile Strength | Suggested Initial Load | Recommended Drill Hole Diameter |
| 33mm | 1.64 kg/m | 0.46-2.4m | 89 kN | 27-54 kN | 30-33mm |
| 35mm | 1.64 kg/m | 0.46-2.4m | 89 kN | 27-54 kN | 32-35mm |
| 39mm | 1.77 kg/m | 0.46-3.0m | 111 kN | 27-54 kN | 35-38mm |
| 46mm | 2.79 kg/m | 0.91-3.65m | 151 kN | 54-89 kN | 42-45mm |
3. Uses
Split set friction rock bolts are commonly used in applications such as:
Coal and ore/mineral underground mines
tunneling excavation projects and tunnel support/rehabilitation
Roadway, railways and metro projects
Hydropower, communication and utility tunneling
Slope stabilization projects and rock reinforcement
Foundation support and repair
4. Product Structure
Split set friction rock bolt is mainly made up of slit steel tube, bearing plate and accessories. It is hammered into the pre-drilled hole with smaller diameter. During driving in process, the tube is squeezed tightly and exerts constant radial force against the wall of hole. In addition, there exists frictional resistance along the entire length of bolt.
Split set friction rock bolt works quickly to enhance the strength of rock mass and limit deformation of underground opening.
5. FAQ
5.1 What is a split set friction rock bolt used for?
Split set rock bolts are commonly used for ground and rock support in mines, tunnels, slopes and underground civil engineering projects.
5.2 Do I need resin or grout for a 42mm split set bolt?
For typical friction rock bolt applications no resin or grout is necessary as the bolt installs using friction between the steel tube and the borehole wall.
5.3 What types of materials do you have available?
The most common types of materials are Q235 steel, 16Mn steel, and 20MnSi steel.
5.4 What length options are available for the 42mm bolt?
Common lengths are 1200mm, 1500mm, 1800mm, 2000mm and 2500mm.
5.5 What keywords should I target for this page?
Try targeting “42mm split set rock bolt”, “friction rock bolt”, “split set bolt”, “mining rock bolt” and “tunnel support bolt”.
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We deliver complete support for underground reinforcement applications, covering: Mining roof and sidewall support systems Tunnel reinforcement solutions Slope stabilization engineering support Foundation anchoring systems Underground safety structural systems From early-stage project planning to on-site application, we help customers build safer and more stable underground environments.
Wanfeng provides a fully integrated product supply system, enabling customers to source all ground support materials from one supplier: Rock bolt systems (resin / FRP / threaded) Cable bolts & anchoring systems Steel arches & I-steel support systems Wire mesh & reinforcement mesh Plates, nuts, bolts & fastening components Resin & cement anchoring materials Mining tools & consumable accessories Our one-stop supply capability reduces procurement complexity and improves project efficiency.
We ensure stable and reliable product performance through strict manufacturing and quality control systems: Standardized production processes Raw material inspection and control Mechanical performance testing Load-bearing and tensile strength verification Batch consistency inspection Final quality inspection before shipment Every product is engineered to meet demanding underground safety requirements.
We also support customized solutions for different mining and engineering projects: Customized rock bolt specifications Non-standard steel support design Special mesh and reinforcement structures Project-based product configuration OEM / private label cooperation We work closely with global partners to develop tailored solutions for complex underground environments.
With strong export experience, we provide efficient global delivery and supply chain support: International export packaging standards Container loading optimization Multi-region shipping support Fast production scheduling for urgent projects Stable long-term supply agreements We ensure reliable delivery to mining projects across different countries and regions.
We support customers throughout the entire project lifecycle: Technical documentation support Installation guidance assistance Product replacement support Long-term supply continuity Engineering consultation for project expansion Our goal is to build long-term partnerships, not just single transactions.
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