trailer wheel hub assembly kit

With over 20 years of experience, we are a professional trailer hub manufacturer focusing on the US market. Equipped with advanced CNC machining equipment and a dedicated R&D team, our products strictly adhere to ISO and US automotive quality standards. Customization is our core strength: we not only provide standard products but also offer one-stop tailored solutions. We fully support customizations based on customer-provided drawings or parameters, with a professional R&D team providing full-process docking to ensure accurate implementation of customization needs.

Product Overview

5000-7000lb (3175kg) idler hub for US market (key load-bearing part). Reliable heavy-load & rotation, fits medium-duty cargo/RV/agricultural trailers (FMVSS compliant). Customizable: load/size/environment.

Core Specifications

Parameter Category	Specific Specification	Key Description
Rated Load Capacity	5000-7000lb（3175kg）	Fits axles; 5000-7000lb customizable
Brake Type	Idler (Non-Brake)	No brakes; uses tow vehicle’s
Compatible Axle Diameter	1.75-2.125 inches	Fits US medium-heavy axles; custom for non-standard
Bearing Configuration	Double-Row Tapered Roller Bearings	High load/impact resistance, even load distribution
Hub Material	High-Strength Cast Iron	ASTM A536 ductile iron, durable/wear-resistant
Surface Treatment	Hot-Dip Galvanization / Powder Coating	Corrosion-resistant; custom for coastal/humid areas
Bolt Specification	6/8 Holes, 5/8″-18 UNF Thread	US auto-grade; customizable holes/threads

Key Features

Double-Row Bearings: Heavy load & anti-vibration.
Hub Shell: Precision-cast iron, durable.
Connecting Bolts: High-tensile steel, secure.
Oil Seal: Temp-resistant, anti-leakage.
Dust Cover: Debris-proof, extends life.

Manufacturing & Quality Assurance
Manufacturing Processes

Material: Ductile iron casting + heat treatment.
Machining: CNC (±0.02mm) for US axle fit.
Surface: Galvanization + powder coating (anti-rust).
Assembly: “Clean-Fit-Tighten-Inspect” + torque check.

Quality Inspection

Load Test: 24h 1.2x load (no deformation = pass).
Dynamic Balance: Runout < 0.2mm (low vibration).
Sealing Test: 50PSI air test (anti-leakage).
Material Test: Spectral analysis (meets ASTM A536).

III. Application Scenarios & Installation Maintenance

Application Scenarios:

Cargo Trailers: Dry van/flatbed, long-haul stable.
RV/Agricultural: Heavy load, rugged conditions.

Installation & Maintenance:

Installation: Clean axle; 2/3 lithium grease; torque 120-150 ft-lbs; seal.
Maintenance: Inspect 4m/8k miles; grease semi-annually (quarterly harsh env).
Abnormality: Replace damaged seals; stop use on noise/overheating.

Product Advantages
Core Advantages

Market Fit: FMVSS compliant, fits top US brands.
Reliable: Double-row bearings + cast iron, 30% less maintenance.
Weather Resistant: Dual-layer treatment for US climates.
Durable: 20% longer life than industry avg.
Customization: One-stop (drawings/params); custom passes 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

All parts in one box—hub, bearings, seals, ready to go. No missing pieces.

Sealed tight to block dirt, water, grit—keeps wheels rolling smooth longer.

Fits most trailers, from small utility to heavy hauls. Easy to match.

Sturdy build handles heavy loads without wobble or wear.

Simple to install—basic tools enough, no pro skills needed.

Saves time hunting for separate parts. One kit, one job done.