Product Introduction

This precision-machined idler shaft is a critical component of the transmission’s range splitter system, designed to work in tandem with the left idler shaft to transfer torque between the main shaft and range gear during high/low gear changes.

• Structure & Material:

• Material: High-strength alloy steel, heat-treated for exceptional hardness, wear resistance, and fatigue strength.

• Design: A stepped cylindrical shaft with precision-ground journals for idler gear bearing support and precise alignment, mirroring the left idler shaft.

• Finish: Hardened and polished surface to reduce friction and prevent premature wear.

  • Performance:

• Provides a rigid, stable axis for the right idler gear, ensuring smooth meshing with the main shaft and range gear during range shifts.

• Works in conjunction with the left idler shaft to maintain balanced torque transfer and precise gear alignment, minimizing noise, vibration, and wear.

  • Durability: The hardened steel construction withstands high torque loads and repeated range shift cycles, ensuring long service life even under heavy-duty operating conditions.

Core Function

1. Gear Support: Acts as a fixed axis for the right idler gear in the range shift mechanism.

2. Torque Transfer: Transmits torque between the main shaft and range gear during high/low gear ratio changes, working in tandem with the left idler shaft.

3. Alignment Maintenance: Ensures precise meshing of gears, reducing noise and wear.

Idler Shaft (Right) WG2212050102 – SINOTRUK HW Series Gearbox Spare Part

When your SINOTRUK HW series gearbox demands a reliable replacement, the Idler Shaft (Right) WG2212050102 stands as the precision-engineered component that keeps your transmission running smoothly. Sourced directly from our factory in China, this genuine-spec idler shaft ensures seamless gear engagement, reduced vibration, and extended service life for heavy-duty applications. Whether you are managing a fleet or sourcing parts for your workshop, Mettlead delivers the exact fit you need — at a price that makes your procurement budget work harder.

Why Choose the Idler Shaft (Right) WG2212050102 from Mettlead?

Every component inside a heavy-truck gearbox plays a critical role, and the right-side idler shaft is no exception. It acts as the support axis for intermediate gears, transferring rotational force between the input and output shafts while maintaining precise alignment. Here is what sets our WG2212050102 idler shaft apart:

• OEM-Matched Dimensions: Manufactured to exact SINOTRUK specifications, ensuring a drop-in fit without machining or modification.
• High-Grade Alloy Steel: Heat-treated for superior hardness and wear resistance, capable of withstanding the immense torque loads of HW series transmissions.
• Precision Surface Finish: Ground and polished bearing journals minimize friction, reduce operating temperatures, and extend bearing life.
• Strict Quality Control: Each shaft undergoes dimensional inspection, hardness testing, and surface defect analysis before leaving our facility.
• Factory-Direct Pricing: By eliminating middlemen, we offer procurement managers competitive unit costs — especially on bulk orders.
• Fast, Reliable Global Delivery: Our well-stocked warehouse means shorter lead times, so your vehicles get back on the road faster.

Technical Specifications – WG2212050102 Idler Shaft (Right)

Application Scenario – Where Does This Idler Shaft Fit?

The Idler Shaft (Right) WG2212050102 is specifically designed for the right-side idler gear assembly within the SINOTRUK HW series gearbox. This transmission family is widely deployed across SINOTRUK’s heavy-duty truck lineup, including:

• SINOTRUK HOWO A7 / T7H / T5G tractor heads and dump trucks
• SITRAK C7H / G7 heavy-duty logistics vehicles
• HOWO mining trucks and construction tippers equipped with HW15710 or HW19710 transmissions
• Special-purpose vehicles using HW series manual gearboxes

In day-to-day operation, this shaft bears continuous rotational loads as it supports the idler gears responsible for reverse and intermediate speed ratios. Over time, surface wear, spalling, or dimensional drift can lead to gear noise, difficult shifting, or even transmission failure. Replacing a worn idler shaft with a quality-assured WG2212050102 restores factory-level performance and prevents costly secondary damage to gears and bearings.

Explore our full range of SINOTRUK HOWO Gearbox Parts and browse more components in our Gearbox Parts Category.

OEM/ODM Capability & Custom Packaging

At Mettlead, we understand that different markets have different branding requirements. That is why we offer flexible OEM and ODM services tailored to your business needs:

• White-Label Packaging: Ship parts under your own brand without any Mettlead markings — ideal for distributors building private-label product lines.
• Custom Packaging Design: We can produce packaging with your logo, part numbers, barcodes, and multilingual labels to match your market requirements.
• Bulk & Assortment Orders: Combine the WG2212050102 idler shaft with other HW gearbox components (shafts, gears, synchronizers, bearings) into kits for convenient resale.
• Quality Documentation: We provide inspection reports, material certificates, and packing lists to support your import clearance and customer confidence.

Discover our complete SINOTRUK HOWO Truck Parts catalog for more components available with custom branding.

Customer Case Study – WG2212050102 Idler Shaft Bulk Order for East Africa

A fleet maintenance company operating over 200 SINOTRUK HOWO dump trucks in East Africa approached Mettlead seeking a reliable supply of Idler Shaft (Right) WG2212050102 for their SINOTRUK HW series gearbox overhaul program. Previously, they sourced from multiple local traders with inconsistent quality — some shafts showed premature wear within 30,000 km.

After receiving samples and verifying dimensional accuracy against OEM drawings, the client placed an initial order of 150 pieces. Our team arranged custom neutral packaging with their internal part coding system for easy warehouse management. The shipment arrived in Dar es Salaam within 18 days via sea freight.

Six months later, the client reported zero premature failures across all installed WG2212050102 idler shafts, reducing their unplanned gearbox downtime by approximately 40%. They have since expanded their orders to include synchronizer assemblies, countershaft gears, and other HW gearbox components — all sourced factory-direct through Mettlead.

Frequently Asked Questions – Idler Shaft (Right) WG2212050102

What is the function of the idler shaft in a SINOTRUK HW gearbox?

The idler shaft serves as the fixed axis upon which intermediate (idler) gears rotate freely inside the gearbox housing. In the HW series transmission, the right-side idler shaft (WG2212050102) specifically supports gears involved in reverse and certain reduction ratios. It must maintain strict concentricity and surface integrity to prevent gear misalignment and excessive noise.

How do I know when the WG2212050102 idler shaft needs replacement?

Common symptoms include abnormal whining or knocking sounds from the gearbox, difficulty engaging reverse gear, metal particles in the transmission oil, and visible scoring or wear marks on the shaft journals during overhaul inspection. If you observe bearing play on the idler gear cluster, the shaft surface has likely worn beyond tolerance.

Is this idler shaft compatible with all HW series gearbox models?

WG2212050102 is designed for the right-side position across most HW series gearboxes used in SINOTRUK HOWO and SITRAK trucks, including HW15710, HW19710, and HW25716 variants. However, we always recommend confirming the OEM part number against your specific gearbox nameplate data before ordering. Our team can help you cross-reference if needed.

What material is the WG2212050102 idler shaft made from?

This shaft is manufactured from carburized alloy structural steel. The carburizing process creates a hard, wear-resistant outer case (HRC 58–62) while maintaining a tough, shock-absorbing core — an essential combination for components subjected to continuous rotational loading and high contact pressures.

Can I order a small quantity for testing before committing to bulk?

Absolutely. Mettlead offers flexible minimum order quantities specifically so procurement managers can validate quality firsthand. You can start with a sample order of the WG2212050102 idler shaft, inspect dimensions and hardness in your own facility, and then scale up with confidence.

How should I store the idler shaft before installation?

Keep the shaft in its original protective packaging in a dry, ventilated environment. Avoid stacking heavy items on top. The precision-ground journal surfaces are susceptible to corrosion if exposed to moisture, so apply a light coat of anti-rust oil if long-term storage is anticipated.

Ready to Source Your WG2212050102 Idler Shaft? Let’s Talk.

Stop overpaying middlemen for uncertain quality. With Mettlead, you get factory-direct access to the Idler Shaft (Right) WG2212050102 for SINOTRUK HW Series Gearbox — backed by strict inspection, competitive pricing, and responsive support from a team that truly understands Chinese truck parts.

Whether you need 10 pieces or 10,000, our sales engineers are ready to provide a tailored quotation, technical data sheets, and shipping solutions to your door.

Contact Us Now to request pricing, check stock availability, or discuss your custom packaging requirements. Your inquiry will be answered within 24 hours.