Delivering highly accurate custom internal gear solutions for aerospace, automotive, robotics, and industrial applications. Experience unmatched precision, quality, and reliability in every component we manufacture.
Internal gears are specialized mechanical components featuring teeth cut on the inner surface of a ring or cylinder. These gears mesh with external spur gears to create compact, high-efficiency power transmission systems essential for modern engineering applications.
Internal gears provide superior contact ratios and driving efficiency, enabling optimal power transmission in space-constrained applications.
Perfect for planetary gear systems and applications requiring high torque transmission with shorter center distances.
Engineered for minimal wear and tear, reducing maintenance costs and extending operational lifespan significantly.
Our state-of-the-art manufacturing capabilities ensure precise, repeatable results for internal gear production across various sizes and specifications.
Precision gear shaping technology for creating internal gears with complex geometries. This process utilizes cutting tools that reciprocate to form accurate tooth profiles with exceptional surface finish quality.
Advanced CNC hobbing machines enable high-volume production of internal gears with consistent quality. This continuous cutting process ensures optimal productivity while maintaining strict dimensional accuracy.
Multi-axis CNC machining centers provide ultimate flexibility for complex internal gear geometries. Advanced CAM programming ensures optimal tool paths and superior surface finishes.
Every internal gear undergoes rigorous quality control procedures using advanced metrology equipment. Our comprehensive inspection protocols ensure dimensional accuracy, surface finish quality, and functional performance meet or exceed customer specifications.
Internal gears are critical components across multiple industries, enabling efficient power transmission and motion control in demanding applications.
Internal gears serve as the ring gear component in planetary gear systems, providing high torque multiplication and speed reduction capabilities. These systems are essential for automotive transmissions, wind turbines, and industrial machinery requiring compact, high-efficiency power transmission.
Automatic transmissions, differentials
Wind turbine gearboxes
Heavy machinery, conveyors
Aircraft actuators, propulsion
Precision internal gears enable accurate positioning and smooth motion control in robotic joints, servo drives, and automated manufacturing equipment.
Critical components in surgical robots, imaging equipment, and prosthetic devices where reliability and precision are paramount.
Rugged internal gears for military vehicles, weapons systems, and surveillance equipment operating in extreme environments.
We offer comprehensive material options to ensure optimal performance in your specific application environment, from high-strength alloys to specialized engineering plastics.
Superior corrosion resistance and strength for demanding environments.
Exceptional hardness and wear resistance for high-load applications.
Traditional materials offering excellent machinability and self-lubricating properties.
Lightweight, quiet operation with excellent chemical resistance.
Decades of expertise, cutting-edge technology, and unwavering commitment to quality make us the preferred partner for critical internal gear applications.
ISO 9001:2015 certified facility with comprehensive quality management systems ensuring consistent, traceable results for every project.
Streamlined production processes and dedicated project management ensure rapid delivery without compromising quality standards.
Dedicated technical team provides comprehensive design consultation, optimization recommendations, and ongoing support.
Comprehensive manufacturing capabilities designed to meet the most demanding precision requirements across diverse industry applications.
10mm – 2000mm
Internal ring gears
0.5 – 25
Metric & imperial pitch
12 – 500
Number of teeth
5mm – 300mm
Axial length
Internal gears up to 500mm diameter with AGMA 8 quality
5-axis simultaneous machining for complex geometries
Induction hardening, carburizing, stress relieving
Final finishing for precision applications
Common questions about internal gear manufacturing, processes, and applications answered by our technical experts.
Internal gears offer several key advantages including higher contact ratios for smoother operation, more compact designs with shorter center distances, higher load capacity due to multiple teeth in contact, and the ability to achieve higher speed reduction ratios in planetary gear systems. They also provide better protection from contamination since the teeth are enclosed within the ring structure.
We utilize several advanced manufacturing processes including gear shaping (most common for internal gears), CNC gear hobbing for high-volume production, broaching for high-precision applications, and wire EDM for complex geometries. Each process is selected based on the specific requirements including material, size, tolerance, and production volume.
Material selection depends on the specific application requirements. For high-load applications, we recommend case-hardened steels (4140, 8620) or through-hardened tool steels. For corrosive environments, stainless steels (316L, 17-4 PH) are ideal. Engineering plastics like PEEK or POM are excellent for low-noise, lightweight applications. Bronze and brass alloys provide good wear resistance and self-lubricating properties.
We consistently achieve AGMA quality grades 6-12 depending on the application requirements. Our dimensional tolerances typically range from ±0.0001″ to ±0.005″ depending on the feature and size. Surface finishes can be achieved as fine as Ra 0.1μm for critical applications. All gears undergo comprehensive inspection including dimensional analysis, profile checking, and functional testing.
Lead times vary based on complexity, material, and quantity. For standard materials and sizes, prototype quantities typically require 2-3 weeks. Production quantities of 10-100 pieces usually require 4-6 weeks. Large or complex gears may require 6-10 weeks. Rush orders can often be accommodated with expedited processing. We provide detailed schedules for each project during the quoting process.
Yes, our experienced engineering team provides comprehensive design support including gear ratio calculations, stress analysis, material recommendations, and manufacturability reviews. We can assist with gear train design optimization, tolerance stack-up analysis, and integration considerations. Our goal is to ensure your gears perform optimally in your specific application while maintaining cost-effectiveness.
We provide comprehensive documentation including material certifications, dimensional inspection reports, surface finish measurements, hardness testing results, and functional test data. For aerospace and medical applications, we can provide full traceability documentation, first article inspection reports, and certificates of conformance. All documentation is maintained in our quality management system for future reference.
Professional CNC machining and custom parts manufacturing services, meeting your precision machining needs with rapid delivery of high-quality components.
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