Parallel idlers are crucial components of belt conveyors, primarily used to support the conveyor belt and the materials placed on it, ensuring smooth operation of the belt. By maintaining frictional contact with the belt, they effectively transfer the weight of the materials to the machine frame, making them an indispensable and key accessory in belt conveyor systems.

I. Core Performance Advantages: Highly Effective Support Tailored for Multiple Scenarios

High-quality parallel idlers must possess core features such as stable support, wear resistance, corrosion protection, low friction, and energy efficiency. Our belt conveyor parallel idlers have achieved breakthroughs in multiple performance areas through technological optimization, effectively addressing the common pain points of traditional parallel idlers—such as easy wear, frequent jamming, and short service life.

1. Stable support prevents deviation, ideal for long-distance transportation

The parallel idlers feature a precision concentricity design, with an error of ≤0.3mm between the roller body and the spindle. Paired with high-precision bearing assemblies, this ensures smooth operation during rotation, effectively preventing belt misalignment caused by unstable support. For long-distance belt conveyors, we’ve optimized the idler spacing design to evenly distribute forces, minimizing belt sag and eliminating issues like material spillage or leakage. This makes the system perfectly suited for continuous conveying applications spanning over 100 meters.

2. Enhanced wear and corrosion resistance, extending service life

As a professional manufacturer of parallel idlers, we deeply understand the unique corrosion and wear challenges faced by different industries. That’s why we offer a variety of material options for roller bodies: For general operating conditions, our natural rubber parallel idlers boast a Shore hardness of 75°–80°, delivering 50% improved wear resistance compared to standard idlers. For corrosive environments—such as chemical processing or metallurgy—we recommend polyurethane or nitrile rubber parallel idlers, which excel in acid-alkali and oil resistance, ensuring stable performance even in corrosive settings with pH levels ranging from 2 to 12. Meanwhile, for heavy-load applications like mining and port operations, our cast-rubber parallel idlers are the ideal choice, featuring strong adhesion that effectively prevents delamination issues. The core shafts are crafted from 45# seamless steel tubing and undergo hot-dip galvanization, achieving an anti-corrosion grade equivalent to GB/T13912-2002 Hot-Dip Galvanized Class A—resulting in an impressive service life exceeding 80,000 hours.

3. Low resistance saves energy and is more economical, reducing operational and maintenance costs.

The rotational resistance of parallel idlers directly affects conveyor energy consumption. To achieve our energy-saving goals, we’ve implemented two key technological optimizations: First, by using bearings with a low coefficient of friction, paired with specialized lubricants, we’ve reduced rotational resistance by 40% compared to the national standard. Second, we’ve refined the surface treatment of the roller bodies, significantly lowering the friction coefficient between the rollers and the conveyor belt—resulting in a 30%–40% reduction in the conveyor’s drive power requirements. Additionally, the idlers feature a labyrinth-type dual-sealing design, achieving an IP65 protection rating that effectively prevents dust and water ingress, thereby reducing the frequency of lubrication and maintenance. As a result, annual operation and maintenance costs are slashed by more than 50%.

4. Compact in structure and easy to install, suitable for a variety of conveyors

Our parallel idlers feature a standardized structural design, with installation dimensions that perfectly match various common belt conveyors—allowing for direct replacement without the need to modify the conveyor itself. The idler ends are equipped with detachable bearing housings, making installation and removal quick and easy, requiring only basic tools and able to be completed by a single person. This significantly boosts equipment maintenance efficiency, making it especially ideal for production line scenarios where uninterrupted operation is critical.

II. Precision Structural Engineering: Quality Control Starts with the Details

The reliability of our parallel rollers stems from rigorous structural design and meticulous control over production processes. We’ve established a comprehensive quality system that spans every step—from raw material selection to finished-product inspection—ensuring that each parallel roller meets industry standards.

- Roller body manufacturing: High-quality rubber or polyurethane materials are selected and combined with the core shaft using a constant-temperature vulcanization process. The vulcanization temperature is precisely controlled at 150°C ± 3°C, ensuring uniform elasticity of the roller body while eliminating issues like air bubbles and delamination. The surface undergoes meticulous polishing, achieving a roughness of Ra ≤ 1.6 μm, thereby minimizing wear on the conveyor belt.

- Core components: The spindle undergoes tempering treatment, achieving a hardness of HB220–250 and enhancing its bending strength by 30%. The bearings are high-quality, well-known brand deep-groove ball bearings, with clearance precisely controlled between 0.02 and 0.05 mm, ensuring smooth rotation without any sticking or jamming.

- Sealing System: Features a dual-seal design incorporating a "skeleton oil seal + labyrinth groove," with sealing elements made from age-resistant nitrile rubber that maintains excellent sealing performance across a temperature range of -40°C to 120°C—and withstands 100,000 rotation cycles without any leakage.

- Finished Product Inspection: Each batch of idler rollers undergoes three core inspections—dynamic balance testing, rotational resistance testing, and wear resistance testing. Any non-conforming products are immediately reworked to ensure a 100% pass rate before leaving the factory.

III. Industry-Wide Application Scenarios: Tailored to Meet Diverse Transportation Needs

Parallel rollers, as the fundamental supporting components of belt conveyors, are widely used in horizontal transportation processes across various industries and have become the preferred support solution for diverse applications thanks to their reliable performance.

1. Mining Industry: Support for Heavy-Load, Long-Distance Conveying

In coal and ore transportation within mines, where material loads are heavy and conveying distances are long, it is recommended to use cast-steel parallel idlers or natural rubber parallel idlers. These are installed on horizontal conveyor sections to provide stable support, while their wear-resistant materials help minimize abrasion of the rollers caused by ore. This setup is ideally suited for the high-dust and humid underground environments typical of mining operations, ensuring the conveyor system can operate continuously for 24 hours.

2. Port Logistics: Efficient Adaptation for High-Volume, Rapid Transportation

In the transfer of bulk cargo materials such as grain, sand, gravel, and containers at port bulk terminals, belt conveyors deliver high-speed, large-capacity operations. Equipped with high-precision parallel idlers, these conveyors ensure smooth belt movement, effectively preventing material spillage caused by unstable support. Moreover, polyurethane parallel idlers are specially designed to withstand the harsh, humid, and salt-spray-laden environments commonly found in ports, offering outstanding corrosion resistance and significantly reducing the frequency of equipment maintenance.

3. Building Materials & Chemicals: Precise Adaptation for Special Operating Conditions

In the transportation of construction materials such as cement and lime, wear-resistant parallel idlers are used to withstand material abrasion. For chemical raw material conveyance, nitrile rubber or polyurethane parallel idlers are employed, offering excellent resistance to acid and alkali corrosion, thereby ensuring long-term stable operation of the idlers and preventing chemical media from eroding and damaging the equipment.

4. Grain Processing: Requirements for Light-Load, Smooth Conveying

When conveying lightweight materials such as grains and flour, using natural rubber parallel idlers can help reduce grain breakage due to their low coefficient of friction. Additionally, the sealed design prevents dust from entering, ensuring the idlers remain clean and operate smoothly—perfectly suited to meet the stringent hygiene requirements of the food processing industry.

IV. Manufacturer Strength Guarantee: Three Compelling Reasons to Choose Us

As a professional manufacturer of parallel idlers, we have established a comprehensive system—from product development to after-sales support—providing customers with cost-effective parallel idler solutions. We are your reliable partner.

- Customized services: We can tailor exclusive parallel idlers according to customers' conveyor parameters, operating conditions, and material characteristics, offering end-to-end services from selection and design to production and delivery, ensuring solutions that meet the needs of even the most specialized scenarios.

- Strict quality control: We have established three key quality assurance processes—raw material screening, ongoing inspections throughout the production process, and comprehensive final product checks. Each batch of products comes with a detailed quality inspection report, ensuring that every item meets industry standards.

- Enhance after-sales support: Offer 24/7 technical consulting services and assist customers with installation and debugging. Products come with a 12-month warranty—during the warranty period, any quality issues will be resolved with free replacements, ensuring you can use them without worry.

V. Technical Parameter Table

As a core component of belt conveyors, the quality and performance of parallel idlers directly influence the operational efficiency and service life of the entire conveying system. Our parallel idler products are crafted using advanced manufacturing processes and high-quality materials, ensuring stable and reliable performance under a wide range of operating conditions. We welcome customers to inquire and make purchases—our team is ready to provide you with expert technical support and comprehensive after-sales services.