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Side Gears Component – Motor Vehicle Manufacturing

Component Specifications

Definition

Side gears are bevel gears located within a differential assembly, typically meshing with pinion gears to distribute rotational force from the driveshaft to the axle shafts. They play a critical role in allowing wheels to rotate at different speeds during cornering while maintaining torque delivery.

Working Principle

Side gears operate on the principle of torque distribution through bevel gear meshing. When a vehicle turns, the differential allows the outer wheel to rotate faster than the inner wheel. The side gears, connected to the axle shafts, rotate at different speeds relative to each other while still receiving torque from the ring gear via the pinion gears, ensuring smooth power transfer and minimizing tire wear.

Materials

Typically forged or machined from high-strength alloy steels such as SAE 8620, 4140, or 4340, often case-hardened through carburizing or nitriding to achieve surface hardness of 58-62 HRC with a tough core.

Technical Parameters

Module 2.5-5.0
Hardness 58-62 HRC surface
Tooth Profile Spiral Bevel
Pressure Angle 20-22 degrees
Precision Grade AGMA 10-12 or ISO 6-8

Standards

ISO 1328, AGMA 2008, DIN 3961

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Side Gears.

Parent Products

This component is used in the following industrial products

Front Differential

A mechanical device in the front axle of an all-wheel drive vehicle that allows the front wheels to rotate at different speeds while distributing torque.

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Engineering Analysis

Risks & Mitigation

Tooth fracture under overload
Premature wear from misalignment
Noise generation due to improper meshing
Lubrication failure leading to seizure

FMEA Triads

Trigger: Insufficient lubrication or contaminated gear oil
Failure: Accelerated tooth wear, pitting, or scoring
Mitigation: Regular maintenance with specified lubricants; install magnetic drain plugs to capture metal particles

Trigger: Excessive torque from aggressive driving or towing
Failure: Tooth bending fatigue or fracture
Mitigation: Design with adequate safety factors; use torque-limiting devices; educate users on load limits

Trigger: Misalignment during assembly or housing distortion
Failure: Uneven load distribution, noise, and premature failure
Mitigation: Precision alignment during assembly; use dowel pins for positioning; conduct run-out checks

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance

Tooth profile tolerance per ISO 1328 Class 7-8; backlash typically 0.10-0.20 mm

Test Method

Gear mesh pattern check with marking compound; torque capacity testing per SAE J1543; hardness verification per ASTM E18

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 primary function of a side gear in a differential?

The side gear transfers torque from the differential case to the axle shafts, allowing wheels to rotate at different speeds during turns while maintaining power delivery.

Can side gears be replaced individually?

Typically, side gears are replaced as part of a matched set with pinion gears to ensure proper meshing and wear patterns, though individual replacement is possible if specifications are precisely matched.

What are common failure modes for side gears?

Common failures include tooth pitting, spalling, wear due to inadequate lubrication, and fracture from excessive torque or impact loads.

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.

Side Gears