Precision Inner Ring Gear Forgings
Weforging supplies mining ring gear forgings made from high-strength 4340 alloy steel, engineered for over 3000 Nm torque. Designed for demands in mining transmission systems, our gears deliver enhanced durability, precision, and resistance to impact and wear. Whether replacing cast gears or designing for new equipment, our closed-die forged ring gears outperform in strength and reliability.
Materials & Heat Treatment
Our ring gears are forged from high-strength alloys such as 4340 steel, AISI 8620, and 9310.
Surface Hardness: HRC 58–62
Core Hardness: HRC 30–35
Processes: Carburizing, quenching, induction hardening
Grain Flow: Continuous alignment with tooth profiles improves fatigue life
For details on forging temperature and processes, see Temperature of Forging Steel.
Manufacturing Capabilities
We provide advanced closed-die forging combined with CNC machining.
Diameters: 300 mm – 3000 mm
Module sizes: 2–12
Gear Accuracy: AGMA Class 10–12
Features: Splines, keyways, custom mounting per drawings
Learn more about our gear machining expertise.
Precision Gear Cutting
Our CNC gear cutting ensures:
Accurate tooth profiles
Reduced vibration and noise
Better gear mesh performance
Long service life under heavy load
This process complements our CNC machining services
Quality Assurance
Every mining ring gear forging undergoes strict quality checks:
100% material certification
NDT testing: ultrasonic and magnetic particle inspection
CMM dimensional verification
Metallurgical analysis and hardness testing
Weforging operates under ISO 9001 standards, with full PPAP documentation. For details, visit our Quality Control page
Applications
Our ring gear forgings are widely used in industries that demand strength, precision, and long service life.
Mining equipment transmissions – Delivering reliable torque transfer and durability under extreme loads.
Wind turbine gearboxes – Large-diameter gears forged through our Rolled Ring Forging process ensuring stability and efficiency in renewable energy systems.
Industrial gear reducers – Providing smooth power transmission and reduced vibration for heavy-duty machinery.
Marine propulsion systems – Forged gears designed to withstand corrosion and high stress in offshore environments.
Heavy construction machinery – Supporting excavators, cranes, and loaders with gears built for maximum fatigue resistance.
By applying forging and CNC machining expertise, Weforging ensures every gear meets the high performance requirements of OEMs in Europe, North America, and beyond.
Contact Us
Looking for reliable custom mining ring gear forgings? Partner with Weforging today for precision-engineered solutions. Contact our team or request a quote
