OEM Hardened Synchronizer Sleeve for Heavy Truck

As a leading heavy truck parts manufacturer with over 13 years of industry expertise, we produce high-performance 7-speed synchronizer sleeves that strictly adhere to OEM standards, ensuring seamless gear shifting and reliable operation in harsh construction, mining and long-haul logistics environments. Our products are manufactured in Jinan, Shandong, China, with a monthly production capacity of 5000 pieces, enabling us to efficiently fulfill bulk orders for global fleet operators, parts distributors and professional repair service providers.

Core Advantages

Superior Material & Hardening Performance: Crafted from high-grade steel, our heavy truck synchronizer sleeves undergo advanced carburizing and carbonitriding treatments, achieving a surface hardness of 58-62HRC with an infiltration layer depth of 0.8-1.2mm. This balanced combination delivers exceptional wear resistance and impact toughness, significantly extending service life and reducing fleet maintenance costs.

Industry-Leading Precision: Manufactured to ISO 6-8 level tooth profile accuracy with a tooth surface roughness Ra ≤ 1.6μm, our sleeves ensure smooth meshing, low operating noise and minimal vibration. Post-heat treatment deformation is strictly controlled to ≤0.02mm, guaranteeing perfect assembly compatibility and eliminating installation delays.

Enhanced Fatigue Resistance: All sleeves receive professional shot peening treatment, which introduces residual compressive stress and improves fatigue life by 20%-30%, making them ideal for continuous heavy-load operation.

Genuine OEM Interchangeability: Designed to exact OEM specifications, our synchronizer sleeves are fully interchangeable with original parts, reducing downtime and ensuring consistent transmission performance for your vehicles.

Technical Specifications

Manufacturing & Quality Control

Our steel synchronizer sleeves follow a rigorous multi-stage production process: precision forging → rough machining → controlled heat treatment → CNC precision machining → surface strengthening treatment. Each step is closely monitored by our experienced quality control team to ensure consistency and reliability. We hold ISO 9001:2015 certification, and all products undergo comprehensive testing including metallographic inspection, micro-Vickers hardness testing and 100% dimensional verification before shipment. We maintain strict quality standards to ensure every sleeve meets or exceeds OEM performance requirements.

OEM/ODM Customization Service

We understand that different vehicle fleets have unique transmission needs. Our dedicated engineering team provides comprehensive custom synchronizer sleeve solutions for global clients. We support customization of dimensions, materials, surface treatments and packaging according to your specific technical requirements. We also offer private labeling and brand printing services to help you build your own brand identity. Free samples are available for quality verification (freight cost borne by the buyer).

FAQ

What types of vehicles are your synchronizer sleeves compatible with?

Our OEM hardened synchronizer sleeves are primarily designed for 7-speed heavy-duty dump trucks, and we can also develop custom solutions for other commercial vehicle models upon request.

What is your delivery time?

For in-stock items, delivery takes 3-7 days. For custom or large-scale bulk orders, delivery time is 20-30 days depending on the order quantity.

How do you ensure product quality?

We conduct pre-production sample testing and 100% final inspection before shipment. All our products are backed by a 1-year warranty against manufacturing defects.

What payment methods do you accept?

We accept T/T and L/C payments in both USD and RMB.