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Professional Internal Gear Manufacturing Services

Carnes-Miller Gear delivers precision internal gear manufacturing with over 50 years of expertise. From shaping and broaching to advanced grinding, we produce high-quality internal gears for aerospace, defense, medical, and industrial applications. Our full-service capabilities ensure exact tolerances, superior finish, and reliable performance for your critical components.

Precision internal gear manufacturing with advanced machinery

Our Internal Gear Manufacturing Services

Comprehensive internal gear solutions from design through finishing, delivering precision components for critical applications.

Internal Splines Manufacturing

Precision broaching and shaping for internal splines with comprehensive tooling inventory. We ensure proper fit through rigorous gaging and verification, offering reverse-engineering solutions for legacy components and small production runs.

Planetary Gears Manufacturing

Expert production of ring gears up to 10-inch pitch diameter with face widths to five inches. Our epicyclic gear systems deliver reliable power transmission for demanding applications requiring compact design and high torque capacity.

Internal Gear Grinding

Advanced profile grinding services achieving AGMA Class 13 tolerances on heat-treated internal gears. We provide lead and profile modifications, tip relief per specifications, and complete gear charts validating all modifications for quality assurance.

Turn-Key Internal Gears

Complete internal gear manufacturing from blank machining through final grinding. Our in-house capabilities ensure precision control, cost-effectiveness, and on-time delivery of finished components ready for assembly in your equipment.

Reverse Engineering Services

Recreate obsolete internal gears when OEM support is unavailable. We analyze samples, develop manufacturing specifications, and produce exact replacements maintaining original performance characteristics for legacy equipment and aftermarket applications.

Custom Internal Gear Design

Collaborative engineering to develop internal gears meeting your specific requirements. Our team provides detailed consultations, material recommendations, and precision manufacturing solutions that enhance performance and reliability across diverse industries.

AGMA-Certified Quality

Precision Internal Gear Manufacturing Built on 50 Years of Expertise

At Carnes-Miller Gear, we specialize in manufacturing high-precision internal gears through shaping, broaching, and grinding processes. Our 18,000-square-foot Locust, NC facility houses advanced equipment capable of producing internal gears and splines to exact tolerances, achieving AGMA Class 10 on shaped components and Class 13 on ground gears. Whether you need internal ring gears for planetary systems, broached internal splines, or reverse-engineered replacements, our comprehensive capabilities deliver the accuracy and surface finish your critical applications demand.

Engineer inspecting precision internal gear component
Proven Performance

Trusted Across Industries

Five decades of delivering precision internal gears to aerospace, defense, medical, and industrial sectors.

"CMG's spur gear manufacturing exceeded our expectations. The AGMA 13 rating on ground gears delivered the precision and reliability our aerospace applications demanded. Outstanding quality."

James H. Mitchell

"We had gears failing due to heat treat distortion. CMG salvaged them through their in-house nital-etch testing and grinding services. Problem solved and cost-effective."

Robert E. Vasquez

"As an internal gear manufacturer, Carnes-Miller Gear delivers unmatched expertise. Their reverse engineering and custom solutions helped us compete effectively in the defense sector."

Dr. Sandra Chen

"We needed helical gears with custom helix angles and specific tolerances. CMG turned around the job in two weeks without compromising quality. Incredibly responsive team."

Michael A. Patterson

"CMG's competitive pricing combined with their AGMA 10 shaped gear capabilities gave us exceptional ROI. Their full-service job shop approach reduced our total manufacturing costs significantly."

Linda Torres

"Over 15 years partnering with CMG for our spline manufacturing needs. Their broaching and shaping expertise, combined with their reliability and professionalism, makes them invaluable."

David W. Foster

"The gear grinding capability up to 400mm diameter with profile modifications and tip relief per specs was exactly what our medical device required. Exceptional technical execution."

Dr. Katherine M. Reeves

"When evaluating internal gear manufacturer options, CMG's 50-year track record, full in-house capabilities, and AGMA 13 rating on ground gears positioned them as our premier supplier."

Gregory L. Hutchins

"CMG's spur gear manufacturing exceeded our expectations. The AGMA 13 rating on ground gears delivered the precision and reliability our aerospace applications demanded. Outstanding quality."

James H. Mitchell

"We had gears failing due to heat treat distortion. CMG salvaged them through their in-house nital-etch testing and grinding services. Problem solved and cost-effective."

Robert E. Vasquez

"As an internal gear manufacturer, Carnes-Miller Gear delivers unmatched expertise. Their reverse engineering and custom solutions helped us compete effectively in the defense sector."

Dr. Sandra Chen

"We needed helical gears with custom helix angles and specific tolerances. CMG turned around the job in two weeks without compromising quality. Incredibly responsive team."

Michael A. Patterson

"CMG's competitive pricing combined with their AGMA 10 shaped gear capabilities gave us exceptional ROI. Their full-service job shop approach reduced our total manufacturing costs significantly."

Linda Torres

"Over 15 years partnering with CMG for our spline manufacturing needs. Their broaching and shaping expertise, combined with their reliability and professionalism, makes them invaluable."

David W. Foster

"The gear grinding capability up to 400mm diameter with profile modifications and tip relief per specs was exactly what our medical device required. Exceptional technical execution."

Dr. Katherine M. Reeves

"When evaluating internal gear manufacturer options, CMG's 50-year track record, full in-house capabilities, and AGMA 13 rating on ground gears positioned them as our premier supplier."

Gregory L. Hutchins

"CMG's spur gear manufacturing exceeded our expectations. The AGMA 13 rating on ground gears delivered the precision and reliability our aerospace applications demanded. Outstanding quality."

James H. Mitchell

"We had gears failing due to heat treat distortion. CMG salvaged them through their in-house nital-etch testing and grinding services. Problem solved and cost-effective."

Robert E. Vasquez

"As an internal gear manufacturer, Carnes-Miller Gear delivers unmatched expertise. Their reverse engineering and custom solutions helped us compete effectively in the defense sector."

Dr. Sandra Chen

"We needed helical gears with custom helix angles and specific tolerances. CMG turned around the job in two weeks without compromising quality. Incredibly responsive team."

Michael A. Patterson

"CMG's competitive pricing combined with their AGMA 10 shaped gear capabilities gave us exceptional ROI. Their full-service job shop approach reduced our total manufacturing costs significantly."

Linda Torres

"Over 15 years partnering with CMG for our spline manufacturing needs. Their broaching and shaping expertise, combined with their reliability and professionalism, makes them invaluable."

David W. Foster

"The gear grinding capability up to 400mm diameter with profile modifications and tip relief per specs was exactly what our medical device required. Exceptional technical execution."

Dr. Katherine M. Reeves

"When evaluating internal gear manufacturer options, CMG's 50-year track record, full in-house capabilities, and AGMA 13 rating on ground gears positioned them as our premier supplier."

Gregory L. Hutchins
The CMG Difference

Why Choose Carnes-Miller Gear?

Five decades of precision gear manufacturing excellence with comprehensive in-house capabilities.

50+ Years Expertise

Since 1973, we've refined our internal gear manufacturing processes to deliver unmatched precision and reliability.

Full In-House Control

Complete manufacturing capabilities from blank machining through grinding ensure quality control, competitive pricing, and on-time delivery.

AGMA Quality Standards

Achieve Class 10 tolerances on shaped gears and Class 13 on ground components with validated gear chart documentation.

Reverse Engineering

Recreate obsolete internal gears when original manufacturers no longer support legacy equipment or aftermarket needs.

Carnes-Miller Gear: 50 Years of Manufacturing Excellence

Your trusted partner for precision internal gear manufacturing.

Founded in 1973, Carnes-Miller Gear has evolved from a specialized gear shaping and hobbing shop into a comprehensive full-service manufacturer. Over five decades, we've navigated economic challenges while consistently delivering precision gears to aerospace, defense, medical, industrial, mining, transportation, construction, agricultural, and rail sectors. Our dedicated 18,000-square-foot facility in Locust, NC houses advanced equipment and experienced craftsmen who understand gear tooling, equipment, nomenclature, and tolerancing. We've built our reputation on reliability, expertise, and delivering quality components that keep critical machinery running smoothly across diverse industries.

Class 13AGMA tolerances on ground gears
50+ YearsManufacturing precision gears since 1973
18,000 sq ftDedicated facility in Locust, NC

Frequently Asked Questions

What is the maximum size internal gear you can manufacture?

We can produce internal ring gears up to 10 inches in pitch diameter with face widths up to 5 inches. For internal splines, our broaching and shaping capabilities accommodate a wide range of sizes with proper tooling selection.

What manufacturing processes do you use for internal gears?

Can you reverse engineer internal gears from samples?

What quality standards do your internal gears meet?

What materials can you work with for internal gears?

Do you offer turn-key internal gear manufacturing?

How long does internal gear manufacturing typically take?

Can you manufacture internal gears for aerospace and defense applications?

Have Questions About Your Internal Gear Project?

Our gear manufacturing experts are ready to discuss your specifications and provide guidance.

Ready to Start Your Internal Gear Manufacturing Project?

Contact Carnes-Miller Gear today for expert consultation, competitive quotes, and precision manufacturing solutions.

Contact Us Today

For immediate assistance, feel free to give us a direct call at +1 704-888-4448 You can also send us a quick email at dan@cmgear.us