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+86-134-23456823
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No. 91, Bada Road, Guancheng Sub-district, Dongguan City, Guangdong Province, China
PU Double Thread Idler Set
This PU Double Thread Idler Set features wear-resistant polyurethane rollers (30-90A hardness) mounted on 45# steel double-ended threaded shafts (M8/M10/M12/M16 available). Available in diameters 30–120mm with customizable wheel lengths and overall lengths, each roller is equipped with dual deep groove ball bearings and circlip for smooth, quiet, heavy-duty performance in industrial automation and conveyor systems. All standard sizes are in stock, and custom solutions based on drawings are supported.
Working principle and selection logic
（1）Working Principle
The PU double-thread idler set works as a driven roller in industrial conveyor and automation systems.
- The 45# steel shaft with double-ended threads provides a fixed, stable mounting point.
- The polyurethane-coated outer wheel contacts and guides the moving belt or material, reducing friction and wear.
- The dual deep groove ball bearings (with circlip) allow the wheel to rotate freely around the fixed shaft, converting sliding friction into low-resistance rolling friction.
- The PU material absorbs shock and reduces noise, while the steel shaft ensures structural rigidity to support heavy loads.
（2）Selection Logic
- Determine Required Load & Application:- Calculate the maximum load and working environment (dry, oily, high-temperature, etc.). Choose 45# steel shaft for heavy loads, and PU hardness (30A-90A) based on friction/noise needs.
- Confirm Installation Size:- Select wheel diameter (30-120mm) and wheel length according to the belt width or contact area. Match the thread size (M8/M10/M12/M16) to your mounting hole specifications.
- Check Bearing & Structure Requirements:- For high-speed or continuous operation, confirm dual bearing design with circlip for stability and long service life.
- Customization Support:- If standard sizes do not fit, provide drawings for custom wheel length, overall length, or special thread/ material requirements.
Application scenarios and industries of use
I. Core Applications
- - Conveyor Belt Systems: As driven rollers to support, guide, and tension conveyor belts, ensuring smooth material flow in production lines.
- - Industrial Automation Equipment: Used in automated assembly lines, sorting machines, and material handling systems to reduce friction and ensure stable operation.
- - **Packaging Machinery: Applied in filling, labeling, and sealing machines to guide packaging materials (films, boxes) with low noise and wear resistance.
- - Printing & Textile Machinery: Guides paper, fabric, or printing belts, providing consistent tension and reducing slippage during high-speed processing.
- - Material Handling Equipment: Used in pallet conveyors, roller conveyors, and lifting systems to support heavy loads and absorb impact.
- - Food & Beverage Processing: Suitable for conveyor lines handling food-grade materials (PU is non-toxic and easy to clean) to meet hygiene requirements.
- - Logistics & Warehousing: Installed in sorting conveyors and automated storage systems to ensure reliable, long-lasting operation under continuous use.
II.Target Industries
- - Logistics & Warehousing: E-commerce fulfillment centers, distribution hubs, and automated storage facilities.
- - Packaging & Printing: Food packaging, pharmaceutical packaging, label printing, and paper processing industries.
- - Automotive Manufacturing: Assembly lines, component transport conveyors, and paint shop material handling systems.
- - Textile & Garment Production: Fabric weaving, dyeing, and garment processing machinery.
- - Food & Beverage: Food processing plants, bottling lines, and bakery production systems.
- - Pharmaceutical & Medical: Drug packaging lines, medical device assembly, and cleanroom conveyor systems.
- - Electronics Manufacturing: PCB assembly lines, component handling conveyors, and testing equipment.
- - General Industrial Automation: Factory automation, material processing, and custom machinery applications.
Presentation of Advantages
Dongguan Jiulong Bearing Machinery Co., Ltd. is a professional bearing wholesaler and mechanical supporting solution provider, located in Dongguan, an internationally renowned manufacturing city in Guangdong, China. With convenient transportation links to Hong Kong, Shenzhen and Guangzhou, we are strategically positioned to serve customers across the globe.
Our Brands & Authorized Distributions
We act as an authorized distributor and dealer for a wide range of world-famous and domestic premium bearing brands:
- International Brands: NSK, NTN, IKO, KOYO, ASAHI, EASE, THK, EZO, NMB (Japan); FAG (Germany); TIMKEN (USA); SAMICK (Korea); SNFA (France)
- Domestic Brands: HRB (Harbin), ZWZ (Wafangdian), NXZ (Northwest), LYC (Luoyang), TMB (Tianma), TR (Dongguan)
Our Product Range
We supply a comprehensive selection of bearing types to meet diverse industrial needs:
- Deep Groove Ball Bearings
- Self-Aligning Ball Bearings
- Cylindrical Roller Bearings
- Spherical Roller Bearings
- Needle Roller Bearings
- Tapered Roller Bearings
- Thrust Ball Bearings
- Insert Bearings with Housings
- Rod End Bearings / Spherical Plain Bearings
- Linear Bearings
- Stainless Steel Bearings
- One-Way Bearings
- Custom Non-Standard Bearings (OEM & ODM services available)
Industries We Serve
Our bearings are widely used in the following sectors for both new equipment assembly and maintenance applications:
- Machinery Manufacturing
- Power Generation
- Paper Making
- Electric Motors
- Chemical Fiber & Petrochemicals
- Food & Beverage Processing
- Ceramics Production
- Machine Tools
- Metallurgy
- Power Tools
- Pharmaceuticals
- Precision Instruments
Why Choose Us?
- Genuine & Reliable Products: We maintain large spot inventories for all major brands to ensure fast delivery.
- Full Service Support: From pre-sales consultation to after-sales technical assistance, we provide comprehensive support for every customer.
- Competitive Pricing: Thanks to long-term partnerships with manufacturers, we offer stable and competitive prices.
- Customer-Centric Philosophy: We prioritize honesty, quality and customer satisfaction, aiming to build long-term partnerships with clients worldwide.
Main Technical Parameters
Common Materials Of Bearings
High-carbon chromium bearing steel
Most common bearing material—high hardness, wear and fatigue resistance. Used in motors, cars, and machine tools.
Stainless steel
Corrosion-resistant; ideal for food, medical, or marine applications. 440C for high hardness, 316 for better chemical resistance.
Ceramic materials
Lightweight, heat- and wear-resistant, non-magnetic. Used in aerospace and high-speed precision equipment.
Engineering plastics
Self-lubricating, quiet, and chemically inert. Suitable for light-load or maintenance-free environments like pumps and food machinery.
Faqs
The shaft is made of 45# carbon steel, and the wheel is coated with wear-resistant polyurethane (PU).
PU hardness ranges from 30A to 90A, customizable based on your application needs.
Standard thread sizes include M8, M10, M12, and M16; other specifications can be customized.
Standard diameters are 30mm to 120mm, all sizes are in stock.
Yes, both wheel length and overall length can be customized to meet your specific installation requirements.
Each roller is equipped with dual bearing steel deep groove ball bearings and a circlip for stable operation.
Widely used in industrial automation equipment, conveyor systems, and material handling lines.
Yes, all standard sizes are in stock and can be shipped within 1-3 working days.
Yes, we provide OEM/ODM customization based on your drawings or samples.
Wear-resistant PU coating, high-strength steel shaft, smooth rotation, heavy load capacity, and flexible customization.
