Planetary Gears
Ring Gears
Spur Gears
Precision Machining Gear Manufacturing Services
Precision Gear Manufacturing Services
Custom Gears
Turn-Key Gears
Turn-Key Gears
Turn-Key Gears
Turn-Key Gear Shafts
AGMA Quality Standards certified

AGMA Quality Standards

50 Years Manufacturing Excellence certified

50 Years Manufacturing Excellence

Internal Spur Gears High-Performance Gear Solutions

Browse our comprehensive line of internal spur gears and high-performance gear solutions, including planetary gears, ring gears, and custom gear manufacturing. Engineered for industrial, aerospace, and heavy equipment applications with AGMA 10-13 quality ratings. Over 50 years of precision manufacturing excellence since 1973.

Our Range of Products
Planetary Gears

Planetary Gears

  • Ring gears up to 10" diameter
  • Face width capacity up to 5 inches
  • Epicyclic gear system design
Ring Gears

Ring Gears

  • AGMA 10-13 quality ratings
  • Planetary gear system capacity
  • Turn-key manufacturing capability
Spur Gears

Spur Gears

  • AGMA 13 ground gear quality
  • Profile grinding up to 15.75"
  • Multiple manufacturing processes
Precision Machining Gear Manufacturing Services

Precision Machining Gear Manufacturing Services

  • Advanced grinding technology
  • Full-service job shop
  • In-house nital-etch testing
Precision Gear Manufacturing Services

Precision Gear Manufacturing Services

  • AGMA 13 precision grinding
  • Grinding capacity up to 400mm
  • Custom gear modifications
Custom Gears

Custom Gears

  • Turn-key manufacturing solution
  • Reverse engineering services
  • 50 years manufacturing experience

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Frequently Asked Questions

What is the standard internal spur gear?

A standard internal spur gear has teeth cut on the inside of a cylinder or ring, meshing with external gears in planetary gear systems.

What is an example of an internal gear?

What AGMA quality ratings do you offer for internal spur gears?

What is the maximum diameter for internal spur gears?

Can you manufacture custom internal spur gears?

What industries use internal spur gears?

What is the lead time for custom internal spur gears?

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

Industries We Serve

Aerospace & Defense

Aerospace & Defense

Precision ground gears for aerospace and defense applications requiring AGMA 13 quality and exacting standards.

Industrial Machinery

Industrial Machinery

Custom gear solutions for industrial equipment, mining machinery, and power transmission systems with AGMA 10-13 ratings.

Transportation & Rail

Transportation & Rail

Durable planetary and spur gears for transportation systems, rail applications, and construction equipment drivetrains.

Agricultural Equipment

Agricultural Equipment

Robust turn-key gears and planetary gear systems for agricultural machinery requiring reliable power transmission.

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

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Spur Gears | Precision Industrial Spur Gears

Precision Industrial Spur Gears

Precision Industrial Spur Gears manufactured by Carnes-Miller Gear deliver AGMA 10 and AGMA 13 quality ratings for demanding power transmission applications. Our spur gears are produced through hobbing, shaping, and grinding processes with capabilities up to 20 inches diameter. With 50 years of expertise, we serve industrial, mining, transportation, and manufacturing sectors requiring reliable gear solutions with superior surface finish and exacting dimensional tolerances.
Precision Gear Manufacturing Services | CNC Gear Cutting Machines with High Performance

CNC Gear Cutting Machines with High Performance

Carnes-Miller Gear specializes in high-performance CNC gear cutting machines and precision gear manufacturing services. With over 50 years of experience, we deliver AGMA 10 and AGMA 13 rated gears through advanced hobbing, shaping, grinding, and broaching processes. Our comprehensive capabilities include spur gears, helical gears, planetary gears, worm gears, and custom splines up to 400mm diameter. Serving aerospace, defense, industrial, and OEM sectors with turn-key solutions and expert reverse engineering.
Planetary Gears | Internal Helical Gears: Precision Engineering Components

Internal Helical Gears: Precision Engineering Components

Internal helical gears are precision-engineered components designed for high-performance power transmission applications. These gears feature helical teeth cut on the interior surface of a ring, enabling smooth, quiet operation with superior load distribution. Manufactured using advanced hobbing and grinding processes, internal helical gears achieve AGMA quality ratings up to Class 13, making them ideal for planetary gear systems, industrial machinery, and demanding mechanical applications requiring exceptional reliability and precision.

Why Industrial & Aerospace Manufacturers Choose Carnes-Miller Gear

50 Years of Gear Manufacturing Excellence

Since 1973, we've delivered precision gears for aerospace, defense, medical, and industrial sectors with unwavering quality and reliability standards.

Complete In-House Manufacturing Control

Full-service capabilities from gear blanking to grinding in our 18,000 sq ft facility ensures precise control over production, cost-effectiveness, and timely delivery.

AGMA 10-13 Quality Ratings

Superior surface finish and exacting standards with AGMA 10 on shaped/hobbed gears and AGMA 13 on ground gears for high-performance applications.

Request a Quote for High-Performance Internal Spur Gears

Connect with our gear specialists for custom solutions. Receive expert guidance on specifications, materials, and manufacturing processes within 24 hours.

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