Product Introduction

This planetary gear is a critical power transmission component, engineered to handle high torque loads during range shifting and heavy-duty operation.

• Structure & Material: Manufactured from high-strength 20CrMnTi alloy steel, with precision-machined gear teeth and a smooth bore that mounts to the planetary gear pins.

• Heat Treatment: Full carburizing and quenching processes achieve a surface hardness of HRC 58–62 for wear and pitting resistance, while maintaining a core hardness of HRC 33–45 for impact toughness.

• Precision & Fit: Gear teeth are precision ground to ensure smooth meshing with the sun gear and ring gear, minimizing noise and power loss. The bore is machined to tight tolerances for a secure fit on the carrier pins.

Core Function

1. Power Transfer: Transmits torque between the sun gear and ring gear, enabling the transmission to switch between high and low gear ratios.

2. Durable Operation: Withstands high rotational speeds and heavy torque loads, ensuring long service life under heavy-duty conditions.

3. Smooth Meshing: Precision-machined teeth minimize vibration and noise during power transmission, contributing to a smoother driving experience.

Planetary Gear WG2210100004 – SINOTRUK HW Series Gearbox Replacement Part

When your SINOTRUK HW series gearbox demands precision-engineered internal components, the Planetary Gear WG2210100004 delivers exactly what you need. This critical transmission component ensures smooth power distribution, reduced gear noise, and extended service life under the most demanding heavy-duty operating conditions. As a result, fleet operators and repair workshops around the world trust this part number to keep their trucks running efficiently. Whether you are restocking your warehouse or fulfilling client orders, Mettlead supplies this planetary gear directly from the factory — meaning you get competitive pricing without sacrificing quality.

Features and Benefits of Planetary Gear WG2210100004

The Planetary Gear WG2210100004 is not just another replacement part — it is a performance-critical component that sits at the heart of the SINOTRUK HW series gearbox system. Here is why distributors and repair professionals choose this gear consistently:

• Precision-Machined Tooth Profile: Every gear tooth is cut to exact OEM tolerances, which means seamless meshing with the ring gear and sun gear. Consequently, this reduces vibration and heat generation during operation.
• High-Grade Alloy Steel Construction: Manufactured from carburized and hardened alloy steel, this planetary gear resists surface fatigue and pitting — even under extreme torque loads typical of heavy-duty trucks.
• Extended Service Life: Thanks to advanced heat treatment processes, the gear surface hardness reaches optimal HRC levels. Therefore, it outlasts inferior aftermarket alternatives and reduces costly repeat repairs.
• Direct OEM Replacement: Part number WG2210100004 matches the original equipment specifications precisely. Installation is straightforward, and no modifications are required.
• Noise Reduction: The tightly controlled gear geometry minimizes backlash, which translates into quieter gearbox operation and improved driver comfort.
• Bulk-Ready Supply: Mettlead maintains stable inventory of this high-demand part, so you can order in volume without worrying about extended lead times.

In addition to performance, choosing the right planetary gear protects your reputation as a distributor. Your customers expect parts that work the first time — and this gear delivers on that promise. Explore more gearbox components and SINOTRUK HOWO gearbox parts in our catalog.

Technical Specifications – Planetary Gear WG2210100004

Accuracy matters when you are sourcing transmission components. The table below outlines the key parameters of the Planetary Gear WG2210100004 to help you confirm fitment and compatibility quickly:

If you need exact dimensional drawings or additional cross-reference data, our technical team is ready to assist. Simply contact us with your requirements.

Application Scenarios – Where Does Planetary Gear WG2210100004 Fit?

Understanding exactly where this part belongs helps you serve your customers more effectively. The Planetary Gear WG2210100004 is specifically designed for the planetary gear set within the SINOTRUK HW series gearbox — one of the most widely deployed heavy-duty transmissions across Africa, Southeast Asia, the Middle East, and Central Asia.

Here are the primary application scenarios:

• SINOTRUK HOWO A7 / T7H Heavy-Duty Trucks: These vehicles commonly use HW19710 and HW19712 gearboxes, where the WG2210100004 planetary gear operates within the auxiliary gearbox section for range shifting.
• SITRAK C7H Series: Higher-specification trucks that still rely on the HW series transmission platform benefit from this gear during overhaul and preventive maintenance.
• SINOTRUK Mining and Construction Dump Trucks: Operating under severe load and frequent shifting cycles, the planetary gear in these applications experiences higher wear rates — making regular replacement essential.
• Fleet Overhaul Programs: Large fleet operators schedule gearbox rebuilds at fixed mileage intervals. The planetary gear is among the most commonly replaced internal components during these services.

In short, anywhere the SINOTRUK HW series gearbox is working, the Planetary Gear WG2210100004 plays a vital role in ensuring reliable power transfer between gear stages. Browse our full range of SINOTRUK HOWO truck parts for companion components.

OEM/ODM Capability and Custom Packaging

Mettlead understands that wholesale distributors have diverse branding and packaging requirements. That is why we offer flexible OEM and ODM services for the Planetary Gear WG2210100004 and our entire gearbox parts catalog:

• White-Label Packaging: We can supply the planetary gear in neutral packaging with no branding — ideal for distributors who repackage under their own brand.
• Custom Branded Packaging: Provide your logo, color scheme, and packaging design, and we will produce finished retail-ready boxes that match your brand identity.
• Custom Labeling and Barcoding: Need specific SKU labels, QR codes, or barcode formats? We accommodate these requirements to streamline your warehouse operations.
• Strict Quality Control: Every batch of Planetary Gear WG2210100004 undergoes dimensional inspection, hardness testing, and visual quality checks before shipment. We maintain full traceability records.
• Flexible MOQ: We work with both small trial orders and large container-volume purchases. Our team will quote pricing tiers based on your order size.

Furthermore, we welcome factory visits. If you want to inspect our production lines and quality processes in person, our team will arrange a guided tour at our facility in China.

Customer Case Study – Planetary Gear WG2210100004 in Action

In early 2024, a truck parts wholesaler based in Lagos, Nigeria reached out to Mettlead with a specific challenge. Their end customers — mostly fleet operators running SINOTRUK HOWO dump trucks in mining operations — were experiencing premature planetary gear failures. The gears they had been sourcing from a different supplier showed pitting and tooth breakage within 30,000 kilometers.

After reviewing their requirements, we supplied a trial order of 200 pieces of Planetary Gear WG2210100004 from our quality-controlled production line. The gears were packed in custom-branded boxes featuring the distributor’s own logo and shipped within 7 days of order confirmation.

Three months later, the feedback was clear: zero warranty claims. The fleet operators reported noticeably smoother gear shifts, and the distributor subsequently placed a follow-up order for 1,000 pieces. Today, they stock Planetary Gear WG2210100004 as a permanent line item and have expanded their Mettlead orders to include additional SINOTRUK HOWO gearbox parts such as synchronizer rings, output shafts, and bearing kits.

This is the kind of partnership we build — one where quality products drive repeat business for you.

Frequently Asked Questions – Planetary Gear WG2210100004

What gearbox models does Planetary Gear WG2210100004 fit?

The WG2210100004 planetary gear is designed for the SINOTRUK HW series gearbox family, including models HW19710, HW15710, HW19712, and related variants. It sits within the planetary gear set of the auxiliary (range) section, facilitating high-low range shifting under load.

What material is the Planetary Gear WG2210100004 made from?

This gear is manufactured from carburized alloy steel — typically 20CrMnTi or an equivalent grade. After carburizing, quenching, and tempering, the surface achieves HRC 58–62 hardness while the core retains sufficient toughness at HRC 33–38. As a result, the gear resists both surface wear and impact fracture.

How can I verify that WG2210100004 is the correct part for my customer’s truck?

First, confirm the gearbox model number stamped on the transmission housing. Second, cross-reference with the original parts catalog for that gearbox model. If you are unsure, send us the gearbox nameplate photo or VIN number, and our technical team will verify compatibility free of charge.

What causes premature failure of planetary gears in HW series gearboxes?

Common causes include insufficient lubrication, contaminated gear oil, misaligned bearing preloads, and the use of low-quality replacement gears with improper heat treatment. Using a genuine-spec Planetary Gear WG2210100004 with correct material and hardness properties significantly reduces the risk of early failure.

Can I order a sample before committing to bulk quantities?

Absolutely. We encourage new partners to order samples for inspection and testing. Once you confirm quality, we can negotiate volume pricing and establish a regular supply schedule. Simply contact us to request samples.

How is the Planetary Gear WG2210100004 packaged for shipping?

By default, each gear is individually wrapped in anti-rust paper, placed in a protective plastic bag, and packed in a sturdy carton box. For bulk orders, gears are palletized for safe container loading. We also offer custom packaging and branding upon request.

What is the typical lead time for bulk orders?

For stocked items like the WG2210100004 planetary gear, standard lead time is 3–7 working days after payment confirmation. For large custom orders exceeding normal inventory levels, production typically takes 15–20 working days.

Ready to Stock Planetary Gear WG2210100004? Let’s Talk.

Your customers need reliable gearbox parts — and you need a supplier who delivers quality, competitive pricing, and dependable logistics every single time. Mettlead has been doing exactly that for distributors across 50+ countries.

Here is what you get when you partner with us for Planetary Gear WG2210100004:

• Factory-direct pricing with transparent volume discounts
• Strict quality control on every batch
• Fast turnaround from order to delivery
• Flexible payment terms and secure transaction methods
• Dedicated account manager for ongoing support

Take the next step. Contact us now to request pricing, check stock availability, or discuss your custom packaging needs. Let’s build a long-term supply partnership that grows your business.