The internal ring gear, also referred to as an internal gear ring or annulus gear, is a precision-machined component featuring teeth cut on the inner circumference of a cylindrical ring. This design enables compact, high-torque power transmission within planetary gear systems, where it serves as the stationary or driven element in conjunction with planetary gears and a central sun gear. Our large-diameter internal gear rings are engineered to deliver exceptional concentricity, rotational accuracy, and structural rigidity. By distributing load across multiple planetary gears, they offer superior load-sharing capabilities, reduced vibration, and significantly higher torque density compared to conventional external gear pairs. These characteristics make them indispensable in heavy-duty industrial applications where reliability, space efficiency, and long service life are paramount. Manufactured from premium materials and subjected to rigorous quality control, our ring gears are built to withstand the most challenging operating conditions while maintaining consistent performance over extended periods.
Internal Gear Ring For Heavy-Duty Planetary Gearbox
Specification
Module
12
Application
Planetary gearbox
Material
42CrMo4
Heat Treatment
Tempering and quenching 285 - 310 HBW
Accuracy
DIN 6
Typical applications of Internal Gear Rings
Engineered for durability and performance, our large-diameter internal ring gears are deployed across a broad spectrum of heavy industries.
- In the mining and cement sector, they are critical components in large ball mills, rotary kilns, and crusher drives, where they reliably transmit enormous torque under constant shock loads and abrasive dust conditions.
- The wind energy industry relies on them within the main gearboxes of wind turbines, where they endure fluctuating loads and extreme weather while ensuring smooth, efficient power generation.
- They also play a vital role in marine propulsion systems, heavy-duty construction machinery such as excavators and tower cranes, and industrial gearboxes for steel mills and sugar presses.
Whether your application demands high precision, extreme durability, or the ability to handle intermittent peak loads, our internal gear rings deliver the performance and dependability you need to keep your operations running around the clock. We offer complete manufacturing capabilities from forging to final inspection, ensuring every ring gear meets the most stringent quality standards.
Production process
5-Step Internal Gear Ring Production Process
Tube Forging
Turning
Internal Gear Shapping
Heat Treatment
Ring Gear Grinding
Tube Forging
When gears need high performance that needs to withstand high loads, high stress, impact loads or fatigue loads, forgings are suggested to use. Forging allows metal fibers to be continuously distributed along the gear profile, significantly improving root strength and fatigue life.
Turning
This is the process of cutting and shaping solid materials into precise parts. It uses tools like lathes, mills, and drills to remove excess material. Machining transforms a simple block of metal into a finished, functional component.
Internal Gear Shapping
Gear shaping is a gear cutting process that used cutting tool that is essentially a “master gear” reciprocates while meshing in a synchronized rolling motion with the gear blank.The cutter is usually moving up and down.
Heat Treatment
Gears need to be running with two gears or above two gears, that makes them easy to be worn-out. That’s why most types of gears need to be harden through heat treatment.
Ring Gear Grinding
Gear Grinding is the the most common high-precision method for finishing hardened gears under gleason profile. There are two methods to use an abrasive grinding wheel removes material from the tooth flanks.
Inspection
Strict Quality Inspection For Internal Gear Rings
Dimension Inspection
Material Testing
Heat Treatment Testing
Accuracy Inspection
Dimension Inspection
Material Testing
Heat Treatment Testing
Accuracy Inspection
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Packages
Professional Packaging Safe Arrival
Customized cost-effective packages for products protection. We select multi-model solutions, combining air, sea, or land freight for the optimal balance of cost, speed, and reliability.
Inner Package
Out Package
Carton
Wooden Package
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Your Precision
Transmission Partner
Do you have drawings to be implemented, or problems to be solved? Please feel free to contact us. From initial inquiry and technical specification confirmation to production and delivery, our dedicated team will provide you with one-on-one service, ensuring that every step meets your stringent requirements for precision.
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