Product Overview
Our 5200-7000lb (3175kg) Idler Hub is designed for the US market, a key load-bearing component. It ensures reliable heavy-load bearing and smooth rotation, suitable for medium-duty cargo, RV, and agricultural trailers, complying with FMVSS. Customizable in load, size and environment.
Core Specifications
| Parameter Category |
Specific Specification |
Key Description |
| Rated Load Capacity |
5200-7000lb（3175kg） |
Fits matching axles; |
| Brake Type |
Idler (Non-Brake) |
No built-in brakes; relies on tow vehicle braking |
| Compatible Axle Diameter |
1.75-2.125 inches |
Fits most US medium-heavy axles; custom for non-standard sizes |
| Bearing Configuration |
Double-Row Tapered Roller Bearings |
Excellent load/impact resistance and load distribution |
| Hub Material |
High-Strength Cast Iron |
ASTM A536 ductile cast iron for durability and wear resistance |
| Surface Treatment |
Hot-Dip Galvanization / Powder Coating |
Corrosion-resistant; custom for coastal/high-humidity areas |
| Bolt Specification |
6/8 Holes, 5/8″-18 UNF Thread |
US automotive-grade; customizable holes/threads |
Key Features
- Double-Row Bearings: Ensures heavy load-bearing and anti-vibration for stable operation.
- Hub Shell: Precision-machined cast iron for durability and integration.
- Connecting Bolts: High-tensile steel for secure attachment.
- Oil Seal: Temp-resistant to prevent grease leakage.
- Dust Cover: Blocks debris to extend lifespan.
- Manufacturing & Quality Assurance
- Core Manufacturing Processes
- Material Forming: Ductile iron casting with heat treatment for durability.
- Precision Machining: CNC (±0.02mm) ensures US axle compatibility.
- Surface Treatment: Galvanization + powder coating for anti-rust.
- Assembly: “Clean-Fit-Tighten-Inspect” with torque verification.
- Quality Inspection Standards
- Load Test: 24h 1.2x load test (no deformation = pass).
- Dynamic Balance: Runout < 0.2mm to reduce vibration.
- Sealing Test: 50PSI air test to prevent leakage.
- Material Test: Spectral analysis meets ASTM A536.
III. Application Scenarios & Installation Maintenance
Application Scenarios (US trailers):
- Medium-Duty Cargo Trailers: Dry van/flatbed, stable for long-haul.
- RV & Agricultural Trailers: Supports heavy loads and rugged conditions.
Installation & Maintenance (key steps):
- Installation: Clean axle; fill 2/3 bearing with lithium grease; torque nuts to 120-150 ft-lbs; seal.
- Maintenance: Inspect every 4 months/8k miles; grease semi-annually (quarterly in harsh environments).
- Abnormality: Replace damaged seals promptly; stop use on noise/overheating.
- Product Advantages
- Core Advantages
- Market Compatibility: FMVSS compliant, fits major US trailer brands.
- Reliable Structure: Double-row bearings + cast iron, 30% less maintenance.
- Weather Adaptability: Dual-layer treatment resists US diverse climates.
- Durability: 20% longer service life than industry average.
- Customization: One-stop service; supports drawings/parameters. Custom products pass strict tests.
About Us
20 years of trailer axle manufacturing experience. Specialized in Australian customization (45/50mm options). Compliant with standards, 24h after-sales, on-time delivery to Australia.
Attention Notes
Hub and spindle matched perfectly—no guesswork on fitting, ready to go.
All parts in one kit: bearings, seals, hardware included, no extras needed.
Smooth rotation cuts friction, makes towing steadier and easier.
Tough build handles heavy loads without bending or wearing down.
Fits most trailers, simple to install with basic tools.
Sealed to block dirt and water, keeps the whole setup lasting longer.
