18CrNiMo7-6 20CrMnMo Alloy Steel Forging Blank For Sun Gear Planetary Gear. Our 18CrNiMo7-6 and 20CrMnMo alloy steel forging blanks are the foundational material for high-performance sun and planetary gears. Meticulously forged, these blanks deliver exceptional strength, toughness, and fatigue resistance, ensuring the final gears withstand extreme torque and continuous operation in demanding power transmission systems.

Product Features

• Superior Mechanical Properties: Forged from premium alloy steels, offering outstanding strength, hardness, and surface hardenability for high-stress gears.
• Exceptional Fatigue Resistance: Refined grain structure provides superior resistance to cyclic loading and contact fatigue, extending gear lifespan.
• High Toughness and Wear Resistance: Designed to resist wear, pitting, and spalling, ensuring smooth power transmission even under heavy loads.
• Optimal for Case Hardening: These alloy steels are ideal for case hardening, allowing for a hard surface with a tough, ductile core.
• Internal Purity and Homogeneity: Forging eliminates defects, resulting in a dense, uniform material structure for consistent performance.
• Precision Machining Foundation: Supplied as near-net-shape blanks for efficient machining to precise gear tooth geometries.

Application Scenarios

These alloy steel forged blanks are indispensable for sun and planetary gears in a wide range of heavy-duty and high-precision applications:

• Wind Energy Gearboxes: Critical for efficiently converting low-speed rotor rotation to high-speed generator input, handling immense torque.
• Heavy Industrial Machinery: Found in planetary gear systems for large excavators, mining equipment, crushers, and rolling mills, providing robust power.
• Automotive & Off-Highway Transmissions: Essential for automatic transmissions and wheel drives in heavy trucks and construction vehicles.
• Marine Propulsion Systems: Used in marine gearboxes for ships and offshore platforms, ensuring reliable power transfer.
• Robotics & Automation: Employed in high-precision robotic arms and automated machinery requiring compact, high-torque gear solutions.
• Aerospace & Defense: For gears in aircraft landing gear and helicopter rotor systems, demanding lightweight yet extremely strong components.

The steel forgings production flow:

raw material inspection → unloading → inspection → preheating → forging → heat treatment → inspection → rough machining → non-destructive testing → inspection → packaging → delivery.

Frequently Asked Questions (FAQs)
1. What is your forging weight range?
We produce forged parts ranging from 100 kg to 7000 kg.

2. Do you provide heat treatment and machining?
Yes, we offer full in-house heat treatment, rough, and finish machining services.

3. Which industries do you supply to?
We serve wind energy, heavy equipment, port machinery, transmission systems, and more.

4. What is your production lead time?

With stock: Around 30 days

Without stock: 40–45 days

5. Where is your factory located?
In Changzhou City, near Shanghai, with shipping via Shanghai Port.

Request a Quote
Please send your technical drawings and requirements to us. Our engineers will review and provide you with a professional quotation and solution shortly.