This internal helical gear is a precision-engineered transmission component designed specifically for planetary speed reducer systems. Featuring helical teeth cut on the inner circumference, this ring gear engages seamlessly with planetary gears to enable smooth, high-torque power transmission within a compact coaxial configuration. Manufactured from high-strength alloy steel with advanced heat treatment, the internal helical gear teeth achieve superior hardness and wear resistance, ensuring reliable performance under heavy loads and demanding operating conditions. Precision CNC machining ensures consistent tooth profile accuracy, minimal backlash, and reduced noise and vibration – critical factors for high-efficiency planetary gearboxes. Available in various module sizes and customizable to meet specific reducer design requirements, this internal helical gear delivers exceptional torque density, durability, and operational stability.
Internal Helical Gear For Planetary Gearbox
Specification
Module
8
Application
Planetary gearbox
Material
42CrMo4
Heat Treatment
Case harden+ Nitriding 50±2HRC
Accuracy
DIN 6
Typical Applications of Internal Gears
This internal helical gear is widely utilized across industries where high-torque, space-saving drive solutions are essential.
- In construction and heavy machinery, it is a core component of planetary gearboxes for excavators, cranes, and concrete mixers, providing the robust torque transmission required for rugged job site conditions.
- In automotive and electric vehicles, it is applied in electric axle reducers, automatic transmissions, and hybrid drive systems, contributing to efficient power delivery in compact drivetrains. The renewable energy sector relies on it for wind turbine pitch and yaw drives, where reliable gear performance under variable loads is critical.
- Additional applications include industrial automation (robotics, conveyor systems), mining and material handling equipment, marine propulsion systems, and agricultural machinery – anywhere that demands high reduction ratios in a confined envelope.
Customizable in material grade, heat treatment, and tooth geometry to meet specific application requirements.
Production process
5-Step 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
Dimension Inspection
Material Testing
Heat Treatment Testing
Accuracy Inspection
Dimension Inspection
Material Testing
Heat Treatment Testing
Accuracy Inspection
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
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