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High-Performance Carrying Idler Roller for Conveyor Belt Systems
YUFENG Carrying Idler Roller, also known as trough carrier roller or conveyor carrying idler, is the primary supporting component installed on the upper material-carrying section of a belt conveyor. It supports the loaded conveyor belt, maintains the designed trough profile, reduces belt sag, and helps keep bulk materials centered during continuous transportation.
The carrying idler is assembled from a steel or HDPE roller shell, solid shaft, precision deep-groove bearing and multi-layer sealing system. YUFENG provides carbon steel, galvanized, HDPE, PU lagging, self-aligning and spiral carrying idlers for mining, cement, ports, thermal power, chemical and other bulk conveying applications.
Available roller diameters include 76, 89, 108, 114, 133, 168, 194 and 219 mm, with roller length, wall thickness, bearing configuration and surface treatment customizable according to conveyor drawings and working conditions.
Types by Shell Material
Carbon Steel Carrying Idler
Carbon steel carrying idlers provide high load capacity, structural strength and impact resistance for conventional heavy-duty conveyor systems. They are suitable for mining, cement plants, thermal power plants, aggregates and other bulk material transportation applications.
HDPE Carrying Idler
HDPE carrying idlers use a high-density polyethylene shell that does not rust like conventional steel rollers. They provide resistance to moisture, salt spray and selected acid or alkali media, making them suitable for coastal ports, chemical plants and humid open-pit mining environments.
PU Lagging Carrying Idler
PU lagging carrying idlers use an elastic polyurethane outer layer to absorb part of the material impact at high-drop loading areas. They are particularly suitable for crusher feeding sections where large or sharp materials can create concentrated impact on the conveyor belt.
| Roller Type | Core Characteristic | Applicable Working Condition |
|---|---|---|
| Carbon Steel Carrying Idler | High load capacity, strong impact resistance and stable cost | Mining, cement plants, thermal power and heavy bulk transportation |
| HDPE Carrying Idler | Rust-free, acid and alkali resistant, low running noise | Coastal ports, chemical plants and humid salt-fog environments |
| PU Lagging Carrying Idler | Elastic outer layer for impact absorption and belt protection | Crusher feeding and high-impact blanking sections |
Configurations for Different Conveyor Sections
Trough Carrying Idler Roller
The three-roller trough arrangement is the most widely used carrying idler configuration for the upper loaded section of a belt conveyor. Available trough angles include 30°, 35° and 45°, allowing the belt to form a deeper carrying trough and increasing its effective material-holding capacity.
PU Lagging Impact Carrying Idler Roller
PU buffer rings are wrapped around the roller body to reduce the impact generated when large lump materials fall onto the conveyor. The roller is normally installed around crusher feeding and other high-drop loading points to reduce damage to the conveyor belt.
Self-Aligning Carrying Idler Roller
The self-aligning carrying idler is equipped with vertical guide rollers that help correct belt deviation during operation. It is used on long-distance conveyor lines where belt tracking is important for reducing edge wear, material leakage and unstable conveying.
Galvanized Anti-Rust Carrying Idler Roller
The roller shell receives hot-dip galvanized surface treatment to improve resistance to moisture and atmospheric corrosion. This configuration is suitable for outdoor stockyards, open-air material storage and conveying systems exposed to humid conditions.
HDPE Anti-Corrosion Carrying Idler Roller
The HDPE shell provides a non-metallic surface that avoids conventional steel rust and offers resistance to selected corrosive environments. It is suitable for coastal wharves, chemical plants and other locations where salt spray or chemical exposure may shorten the service life of ordinary steel rollers.
Spiral Anti-Sticking Carrying Idler Roller
The spiral surface uses a helical convex structure to help remove sticky clay, wet sand and other material adhering to the conveyor belt. This design helps reduce material accumulation around the roller and can lower the risk of roller blockage in wet conveying conditions.
Specifications
Roller Diameter
YUFENG provides standard outer diameters of 76, 89, 108, 114, 133, 168, 194 and 219 mm. The appropriate diameter should be selected according to belt width, belt speed, load and conveyor structure.
Matched Conveyor Belt Width
The carrying idler range can be matched with conveyor belt widths of approximately 500–2400 mm. Roller length and shaft dimensions can be customized according to the conveyor frame and supporting bracket.
Conveyor Frame Compatibility
YUFENG Carrying Idler Roller products are designed for compatibility with common DTII, TD75 and CEMA-type conveyor frame arrangements. Exact dimensions should be confirmed against the customer's existing frame drawing before bulk production.
Belt Compatibility
The rollers can be matched with Fabric Conveyor Belt, Steel Cord Conveyor Belt, Sidewall Conveyor Belt and Pipe Conveyor Belt systems according to their structural requirements and belt width.
Material and Surface Treatment Options
Roller Shell Material
Available shell materials include Q235 carbon steel, HDPE and 304 stainless steel. Carbon steel is intended for general heavy-duty applications, HDPE for corrosion-sensitive environments, and stainless steel for applications requiring increased corrosion resistance.
Surface Treatment
Surface options include electrostatic powder coating, hot-dip galvanizing and full PU lagging. The appropriate treatment should be selected according to humidity, corrosion, impact and material characteristics.
Bearing Configuration
YUFENG can supply domestic high-precision bearings or imported SKF and FAG C3-clearance bearings according to the operating requirements and project specification.
Sealing Structure
Double or triple composite sealing structures can be configured using multi-channel nylon labyrinth seals and rubber contact seals to limit the entry of dust and water into the bearing cavity.
Special Working Conditions
Special configurations such as flame-retardant and anti-static carrying rollers for underground mining or low-temperature-resistant rollers for northern open-pit mines can be discussed according to the application.
Supporting Accessories
Matching carrying idler brackets and conveyor support frames can be supplied according to roller dimensions and conveyor frame design.
Structure and Raw Materials
Roller Shell
Standard steel rollers use Q235 high-frequency ERW steel pipe, while HDPE versions use virgin HDPE material. Shell dimensions and wall thickness can be adjusted according to the required load and roller length.
Roller Shaft
The roller shaft uses 45# cold-drawn solid round steel, providing bending resistance under continuous radial and axial loading. Shaft diameter and end configuration can be matched to the supporting bracket.
Bearing
C3-clearance deep-groove ball bearings are used for the rotating assembly. Bearing selection affects running resistance, temperature rise, service life and suitability for continuous conveyor operation.
Sealing Components
The sealing system uses high-toughness nylon labyrinth components together with weather-resistant nitrile rubber sealing rings. The multi-stage structure helps reduce contamination of the bearing cavity by dust and water.
Incoming Material Inspection
Steel tubes, shafts and bearings are sampled and inspected for relevant dimensional and performance requirements before assembly. Materials that fail the factory inspection criteria are not released for production.
Performance
Carrying idlers operate continuously while the conveyor is running, so rotation resistance, concentricity, bearing protection and static load capacity are important indicators for roller selection. YUFENG controls machining and assembly accuracy to maintain stable running performance.
| Performance Item | Standard Requirement | Test Standard |
|---|---|---|
| Rotation Resistance Coefficient | ≤0.008 | ISO 15365 |
| Dust & Water Protection Grade | IP65 | IP Test Standard |
| Rated Load Service Life | ≥30,000 working hours | Factory Accelerated Aging Test |
| Roller Shell Concentricity | ≤0.5 mm | Dial Indicator Test |
| Bearing Anti-Aging Duration | ≥500 h high-temperature aging test | Internal Lab Test |
| Axial Static Bearing Capacity | 1.5 times rated load without deformation | Static Pressure Test |
Actual service life and load performance depend on roller diameter, shell thickness, bearing configuration, belt speed, material load, operating environment and maintenance conditions.
Quality Standards
Conveyor Industry Standards
YUFENG rollers are manufactured with reference to CEMA, GB/T 10595 and ISO 15365 requirements for conveyor equipment and roller performance.
Safety and Export Requirements
Applicable underground mine roller configurations can be supplied according to relevant coal mine safety requirements. Export orders can be supported with applicable CE and SGS inspection documentation according to the selected product and destination market.
Quality Documentation
Available documentation can include ISO9001 quality management certification, CE export documentation, SGS raw material inspection reports, coal mine safety test documentation, and factory rotation resistance and service-life test reports.
Installation and Carrying Idler Replacement
New Conveyor Frame Installation
The carrying idler support bracket is first fixed to the conveyor frame according to the designed spacing. Both ends of the roller shaft are aligned with the bracket mounting holes and secured with the specified pins or bolts, followed by a manual rotation check to confirm smooth running.
Worn Carrying Idler Replacement
The conveyor should be stopped and isolated from the power supply before maintenance. After removing the shaft locking components, the damaged carrying idler can be removed and replaced with a new roller. Rotation and belt alignment should be checked before the conveyor is restarted.
Self-Aligning Idler Position
On long-distance conveying lines, self-aligning carrying idlers can be installed at suitable intervals, with approximately 80–100 m suggested according to the supplied configuration and operating conditions.
Impact Idler Arrangement
For crusher feeding points, approximately three to five groups of PU lagging impact carrying idlers can be arranged within approximately 5 m of the blanking point to distribute material impact and protect the conveyor belt.
Matching Conveyor System Products
Conveyor Belt Series
YUFENG can supply Fabric Conveyor Belt, Steel Cord Conveyor Belt, Sidewall Conveyor Belt, Pipe Conveyor Belt, Patterned Conveyor Belt and Rough Top Conveyor Belt for different bulk conveying applications.
Roller Accessories
Supporting products include trough, impact, self-aligning and return idler brackets, support stands and other roller mounting components.
Rubber Accessories
Wear-resistant rubber sheets, conveyor skirting rubber, vulcanization repair adhesives and patch kits are available for conveyor installation and maintenance.
HDPE Pipeline Series
HDPE Water Pipe and HDPE Dredge Pipe can be supplied for auxiliary fluid transportation in mining and industrial projects.
Custom Processing
Roller diameter, shell wall thickness, shaft dimensions, sealing structure and other parameters can be adjusted according to customer drawings and specific operating conditions.
Packaging and Storage
Small Diameter Rollers
76, 89 and 108 mm carrying idlers can be bundled with steel wire, protected with plastic caps on both shaft ends and packed in solid wooden cases for international transportation.
Large Diameter Rollers
168, 194 and 219 mm heavy carrying idlers can be arranged on wooden pallets, wrapped with protective plastic film and secured for container transportation.
HDPE Carrying Idlers
HDPE rollers can be separated with cushioning materials to reduce surface collision, scratching and deformation during loading and unloading.
Storage Conditions
Rollers should be stored horizontally on pallets with a recommended stacking height of no more than 1.2 m. Outdoor storage should use waterproof covering, and prolonged exposure to rainwater should be avoided.
How to Select the Correct Carrying Idler Roller
Conveyor Belt Width
Provide the conveyor belt width and existing frame dimensions so that the appropriate roller length, shaft dimensions and bracket configuration can be confirmed.
Roller Diameter and Type
Select the outer diameter and structure according to belt speed, material load, conveying section and impact conditions. Trough, impact and self-aligning carrying idlers have different functions within the conveyor system.
Working Environment
Provide information about humidity, salt spray, chemical exposure, outdoor use, temperature and material characteristics. This determines whether carbon steel, galvanized steel, HDPE, stainless steel or PU lagging is more appropriate.
Material Lump Size and Impact
Large or sharp bulk materials may require PU lagging impact carrying idlers around loading points, while conventional material transportation can use standard carbon steel trough carrying idlers.
Request a Carrying Idler Roller Quotation
Required Technical Parameters
For an accurate factory quotation, provide the matched conveyor belt width, roller outer diameter, carrying idler type, working environment, material characteristics, total order quantity and destination port.
YUFENG technical engineers can evaluate the appropriate roller diameter, shell material, bearing, sealing structure and supporting bracket according to the conveyor system requirements.
YUFENG Global Contact Information
jayce@yuphengbelt.com
WhatsApp / WeChat / Mobile
+86 15318787602
Factory Address
Xiagou Villege, ETDZ, Qingdao, Shandong, China
- View as
Troughing Idler Roller
Built for heavy-duty bulk material conveying, YUFENG Troughing Idler Roller provides stable belt support and load carrying for mining, thermal power, cement, grain and port conveyor systems. Manufactured to CEMA, ISO and MT/T 821 standards, it features multi-layer labyrinth sealing to protect bearings from dust, water and slurry. Available in 20°, 35° and 45° trough angles for customized conveying requirements.
Equal Length Troughing Idler Roller
Symmetrical three-roller support makes YUFENG Equal Length Troughing Idler Roller a reliable carrying solution for bulk material conveyors. Designed for mining, thermal power, cement, grain and port applications, it features multi-layer labyrinth sealing to protect internal bearings from dust, water and slurry. Available with 20°, 35° and 45° trough angles for stable, high-capacity conveying.
Heavy Duty Troughing Idler Roller
Engineered for high-tonnage bulk material conveying, YUFENG Heavy Duty Troughing Idler Roller features a reinforced 3-roller bearing frame and advanced sealing system for harsh mining, power, cement and port environments. With 20°, 30°, 35° and 45° trough angle options, it supports higher conveying capacity while reducing material spillage and protecting bearings from dust, slurry, salt fog and heat exposure.
Self-Aligning Troughing Idler
This industrial Self-Aligning Troughing Idler adopts a 3-roller trough structure mounted on a free-pivoting central base, paired with side limit guide rollers to deliver continuous real-time belt centering without manual adjustment. It serves as a mandatory auxiliary component for long-span conveyors over 80 meters, widely deployed in open-pit mining, grain storage terminals, aggregate quarries, thermal power coal yards and coastal bulk cargo ports, extending the overall service life of conveyor belts by up to 45% and cutting material spillage caused by misalignment below 0.35%.
YUFENG is a professional Carrying Idler Roller manufacturer and supplier in China. We have an experienced sales team, professional technicians, and an after-sales service team.
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