Axle Bearings: Bore Diameter 20-150 mm, Width 10-50 mm

Component Specifications

Definition

Axle bearings are critical mechanical components designed to support radial and axial loads on rotating shafts within axle assemblies. They consist of inner and outer rings with rolling elements (balls or rollers) separated by a cage, housed within a protective casing. These bearings facilitate smooth rotation by minimizing friction through rolling contact rather than sliding, ensuring precise shaft positioning, load distribution, and vibration damping. They are engineered to withstand operational stresses including thermal expansion, contamination, and variable torque loads while maintaining lubrication integrity.

Working Principle

Axle bearings operate on the rolling-contact principle where rolling elements (balls, cylindrical rollers, or tapered rollers) rotate between inner and outer raceways. This converts sliding friction into rolling friction, significantly reducing energy loss and wear. The bearing geometry distributes loads evenly across contact surfaces, while lubrication (grease or oil) forms a protective film to prevent metal-to-metal contact, dissipate heat, and inhibit corrosion. Precision tolerances ensure minimal clearance for optimal alignment and load capacity.

Materials

High-carbon chromium steel (AISI 52100/SUJ2) for rings and rolling elements; case-hardened steel for heavy loads; ceramic (silicon nitride) for high-speed applications; polymer cages (PEEK, nylon) for corrosion resistance; stainless steel (AISI 440C) for corrosive environments; seals made from nitrile rubber or fluoroelastomer.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Width	10-50 mm
Lubrication	Grease-packed or oil-bath
Speed Limit	5,000-15,000 rpm
Bore Diameter	20-150 mm
Outer Diameter	40-280 mm
Precision Class	ABEC 1/3/5/7
Static Load Rating	5-150 kN
Dynamic Load Rating	10-200 kN
Operating Temperature	-30°C to +120°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 15, ISO 355, DIN 625, DIN 5412

Parent Products

This component is used in the following industrial products

Axle Assembly

A structural assembly that connects wheels to a vehicle's chassis and transmits driving torque while supporting vehicle weight.

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Engineering Analysis

Risks & Mitigation

Overheating due to inadequate lubrication
Contamination from dirt or moisture ingress
Misalignment causing premature wear
Overloading beyond rated capacity
Corrosion in harsh environments

FMEA Triads

Trigger: Insufficient or degraded lubrication
Failure: Increased friction, overheating, and seizure
Mitigation: Implement scheduled lubrication maintenance; use high-temperature grease; install condition monitoring sensors.

Trigger: Shaft misalignment or improper installation
Failure: Uneven load distribution, vibration, and fatigue cracking
Mitigation: Use alignment tools during assembly; follow torque specifications; conduct run-out checks.

Trigger: Contaminant ingress (dust, water)
Failure: Abrasive wear, pitting, and reduced lifespan
Mitigation: Apply effective sealing (lip seals, labyrinth); maintain clean operating environments; use sealed bearing units.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Radial runout ≤ 0.02 mm; axial play ≤ 0.05 mm per ISO 492

Test Method

Vibration analysis (ISO 15242), noise testing, load endurance testing, salt spray corrosion testing (ISO 9227)

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Axle Bearings

2 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Jiangsu Tedrail Industrial Co., Ltd.

Jiangsu, CN

Also makes: Slack adjuster, Control Valve, Brake System and 4 more

Listed on the company's own website · profile compiled by CNFX from public sources

Listed there as: “Axle Bearings”
View source page ↗ tedrail.com · checked 2026-09-13

View profile Send enquiry

Maanshan Kingrail Technology Co.,ltd

Anhui, CN

Also makes: Track Rail, Brake beam, Slack adjuster and 3 more

Listed on the company's own website · profile compiled by CNFX from public sources

Listed there as: “Railway Axle Bearings”
View source page ↗ kingrailparts.com · checked 2026-09-14

View profile Send enquiry

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Structural component that encloses and protects suspension system elements while providing mounting points and structural integrity.

Brake Disc/Rotor

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Frequently Asked Questions

What is the difference between axle bearings and wheel bearings?

Axle bearings specifically support the rotating axle shaft within an assembly, handling torque from the drivetrain. Wheel bearings support the wheel hub and allow wheel rotation, often integrated with the axle in some designs. Both share similar principles but differ in load orientation and mounting.

How often should axle bearings be replaced?

Replacement intervals vary by application: automotive bearings typically last 150,000-250,000 km under normal conditions; industrial bearings require inspection every 6-12 months. Signs of failure include noise, vibration, overheating, or lubrication leakage.

Can axle bearings be regreased?

Yes, many industrial axle bearings are designed for relubrication via grease fittings to extend service life. Sealed automotive bearings are usually non-serviceable and replaced as a unit.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Axle Bearings