The WG2229020025 Thrust Bearing Retaining Washer, also known as the transmission input shaft / synchronizer thrust washer, is a critical positioning and limiting component in heavy-duty truck transmission systems.
It is responsible for stabilizing the axial position of bearings and gears, ensuring precise alignment and smooth operation of the gearbox under high-load conditions. It plays a key role in maintaining transmission efficiency, stability, and durability.
Key Function
- Controls axial movement of gears and bearings
- Maintains precise positioning of transmission components
- Prevents axial displacement and misalignment
- Ensures smooth and stable gearbox operation
Product Advantages
● Premium Bearing Steel Material
Manufactured from GCr15 high-carbon chromium bearing steel, the product features:
- High hardness and excellent toughness
- Superior wear and fatigue resistance
- Stable performance under heavy load conditions
Advanced double-refining metallurgy reduces internal impurities, improving material density and preventing deformation or cracking during operation.
● High Hardness & Excellent Fatigue Resistance
Through quenching + low-temperature tempering heat treatment, the washer achieves:
- Hardness level: HRC 61–65
- Strong impact resistance
- Excellent fatigue durability
It can withstand high-frequency axial thrust from input shafts and synchronizers without failure.
● Precision Surface Treatment for Low Friction
The product adopts double-sided precision grinding + mirror polishing, providing:
- Extremely low surface roughness
- Reduced friction coefficient
- Faster heat dissipation
This effectively minimizes wear, reduces noise, and improves transmission smoothness.
● Stable Axial Load Distribution
The washer is designed to evenly distribute axial thrust across the contact surface, ensuring:
- No localized stress concentration
- Reduced risk of gear or bearing damage
- Improved transmission system reliability
It effectively prevents serious failures such as bearing damage or gear tooth breakage.
● Enhanced Transmission Stability & Comfort
By maintaining precise alignment between synchronizer and thrust bearing, it helps:
- Improve shifting smoothness
- Reduce gearbox vibration and noise
- Prevent gear misalignment and shifting issues
This significantly enhances driving comfort and operational stability.
Technical Features
- Material: GCr15 high-carbon chromium bearing steel
- Hardness: HRC 61–65
- Heat treatment: Quenching + low-temperature tempering
- Surface treatment: Double-sided precision grinding + mirror polishing
- High dimensional accuracy and flatness control
Application Scope
- Heavy-duty truck transmissions
- Input shaft support systems
- Synchronizer assemblies
- Commercial vehicle gearbox systems
- OEM production and aftermarket repair
Performance Benefits
- Stable axial positioning performance
- Reduced friction and heat generation
- Extended service life of gearbox components
- Improved shifting smoothness
- Enhanced transmission reliability under heavy load
Supply & Service
- Ready stock for fast delivery
- OEM customization available
- Stable quality for long-term supply
- Professional technical support provided