INDUSTRY COMPONENT

Axle Shaft

A rotating shaft that transmits torque from the differential to the wheels in automotive and machinery applications.

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Component Specifications

Definition
The axle shaft is a critical powertrain component that connects the differential assembly to the wheel hub, transferring rotational force and torque to drive the vehicle. It must withstand significant torsional, bending, and shear stresses while maintaining precise alignment and rotational balance.
Working Principle
Works on the principle of torque transmission through rotational motion. The differential splits engine power between two axle shafts, which rotate at speeds determined by driving conditions (straight vs. turning). The shaft's splined ends engage with the differential side gear and wheel hub to deliver power while allowing for suspension movement.
Materials
Typically forged alloy steel (SAE 4140, 4340, or similar grades) with heat treatment (carburizing or induction hardening) to achieve surface hardness of 55-62 HRC and core toughness. Some applications use carbon fiber composites or high-strength aluminum alloys for weight reduction.
Technical Parameters
  • Length 500-1200 mm (vehicle dependent)
  • Weight 5-15 kg
  • Diameter 25-50 mm
  • Spline Type Involute splines (30-40 teeth common)
  • Surface Finish Ra 0.8-1.6 μm
  • Torque Capacity 800-3500 Nm
Standards
ISO 4156, DIN 5480, SAE J498, ISO 286-2

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Axle Shaft.

axle shaft drive shaft automotive axle CV axle half shaft torque transmission differential connection powertrain component Axle Shaft in Motor Vehicle Manufacturing

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
  • Fatigue failure from cyclic loading
  • Spline wear leading to power loss
  • Corrosion in harsh environments
  • Improper installation causing vibration
  • Material defects leading to fracture
FMEA Triads
Trigger: Material fatigue from repeated torque cycles
Failure: Shaft fracture under load
Mitigation: Regular inspection for surface cracks, proper heat treatment, and using fatigue-resistant alloy steels
Trigger: Improper spline engagement during assembly
Failure: Spline stripping and power transmission loss
Mitigation: Precise machining to tolerance standards, proper lubrication during installation, torque verification
Trigger: Corrosion in salt or moisture exposure
Failure: Reduced cross-sectional strength and eventual failure
Mitigation: Protective coatings (zinc plating, powder coating), regular cleaning in corrosive environments

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Spline dimensions: ISO 4156 Class 7, Diameter: h7/h8 tolerance, Straightness: 0.1 mm per 300 mm
Test Method
Torque testing to 150% of rated capacity, rotational fatigue testing (minimum 1 million cycles), hardness testing (Rockwell C), magnetic particle inspection for cracks

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What is the difference between an axle shaft and a CV axle?

An axle shaft is a straight rotating shaft, while a CV (Constant Velocity) axle includes constant velocity joints at both ends to accommodate angular movement in front-wheel drive and independent suspension systems.

How do I know if my axle shaft is failing?

Common signs include clicking sounds during turns (CV joint wear), vibration during acceleration, grease leakage from boots, or visible damage to the shaft or splines.

Can axle shafts be repaired or must they be replaced?

Typically replaced as a unit due to precision requirements and heat treatment. CV joints may be serviceable on some models, but damaged shafts require complete replacement.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

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.

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