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
| Type | Width / Tolerance mm | Height mm | Hole Diameter mm | Weight kg/m |
| WF/280/3.0 | 280 ± 2.5 | 23.5 ± 1.5 | 34 | 7.35 |
| WF/280/2.8 | 280 ± 2.5 | 23.5 ± 1.5 | 34 | 6.68 |
| WF/280/2.5 | 280 ± 2.5 | 23 ± 1.5 | 34 | 6.12 |
| WF/280/2.2 | 280 ± 2.5 | 22.7 ± 1.5 | 34 | 5.39 |
| WF/250/3.0 | 250 ± 2.5 | 22 ± 3.0 | 34 | 6.65 |
| WF/250/2.8 | 250 ± 2.5 | 22 ± 2.8 | 34 | 6.2 |
| WF/250/2.5 | 250 ± 2.5 | 21 ± 2.5 | 34 | 5.45 |
| WF/250/2.2 | 250 ± 2.5 | 20 ± 2.2 | 34 | 4.87 |
| WF/220/3.0 | 220 ± 2 | 22 ± 3.0 | 34 | 5.99 |
| WF/220/2.8 | 220 ± 2 | 22 ± 2.8 | 34 | 5.59 |
| WF/220/2.5 | 220 ± 2 | 21 ± 2.5 | 34 | 4.99 |
| WF/220/2.2 | 220 ± 2 | 20 ± 2.2 | 34 | 4.39 |
| WF/180/3.0 | 180 ± 2 | 22 ± 3.0 | 34 | 4.29 |
| WF/180/2.8 | 180 ± 2 | 22 ± 2.8 | 34 | 4.94 |
| WF/180/2.5 | 180 ± 2 | 21 ± 2.5 | 34 | 4.41 |
| WF/180/2.2 | 180 ± 2 | 20 ± 2.2 | 34 | 3.89 |
2. Materials
Steel straps are commonly made from structural steel materials including:
* Q235
* Q345
* Q420
* Other steel grades upon request
The steel strap can be produced via hot rolling or cold bending, depending on your requirements for strength, dimensional accuracy and desired finish.
3. Production Process
There are two production methods for W steel strap, hot rolling and cold bending.
Hot rolled W steel strap will result in high strength, rigidity and toughness, though if you require a painted surface, the hot rolled underside may need to be treated further.
Due to cold bending, the steel strap will have a flatter surface and offer a higher degree of dimensional accuracy. Profile shape will also be consistent along the entire length of the strap, allowing for easier installation.
4. Applications
Our W steel strap is commonly used across a variety of industries. Many of these applications include:
* Coal mine roof support
* Underground roadway reinforcement support
* Tunnel roof support bolts
* Rock bolt support
* Anchor bolt support and reinforcement
* Bridge supports
* Building beams/columns
* Machinery structural parts
* Shipbuilding support
* Railway and metro
* Supports for wind power and solar photovoltaic_mounting structures
5. Advantages
Due to its W shape profile, the steel strap has higher rigidity and greater bending resistance when compared with flat steel strips. Using a W steel strap with roof bolts or anchor bolts helps better distribute support forces across a larger area. This results in better control of the roof in underground roadways.
When replacing traditional timber supports with steel straps, less material is needed and construction becomes easier and more efficient. Steel straps are great for supporting safer operations in underground mines and tunnels. W steel strap is especially suitable for medium-stable and unstable rock layers.
6. Custom Options
We can produce W steel straps based on project drawings and installation requirements. Customizations available include:
* Width
* Thickness
* Height
* Length
* Hole diameter
* Hole spacing
* Steel grade
* Surface treatment
* Production method: hot-roll or cold bent
* Packing requirements
7. FAQ
Q: What is W steel strap used for?
A: Welded steel strap is used for mine roof support, tunnel reinforcement, rock bolt support systems, anchor bolts, underground roadway stabilization.
Q: What is the hole diameter?
A: As per the specification table above, the standard hole diameter is 34 mm. However, we can customize different hole diameters upon request.
Q: What sizes are available?
A: The common sizes are 180mm, 220mm, 250mm, 280mm. There are different thickness and weight specifications for you to choose.
Q: What steel materials can I use?
A: The common steel material are Q235, Q345 and Q420. If you need other steel materials, we can customize them according to your project requirements.
Q: Can I customize the length and hole spacing?
A: Yes, you can customize the length, hole spacing, hole diameter, width, thickness and surface treatment according to your project drawings.Send us an enquiry and we will send you our standard specification table.
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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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