Gear Manufacturing can repair and manufacture any size Gear & Pinion, including Helical, Double Helical, Herringbone, Split Herring bone, Bevel, Spiral Bevel, Spur Gears, Ring Gears, Eternal Ring Gears, Rack & Pinion, Worm Gears, Double Enveloping Worm Gears, Hypoid Gears, Screw Gears, Plus More!

We can cut Gears up to 20 feet in Diameter, at a considerable savings over OEM Manufacturer's pricing, with a 24 Month Warranty and the Quickest Turn Around Time in the Nation.

Once National Gear Repair Manufactures a Gear set for you, we will provide you with all Certifications for Heat Treating and Carburization.

Gears from 1/2 Inch to 20 Feet in Diameter

Gear Types

Key Equipment:

  • Worm and Worm Gears
  • Helical
  • Bevel
  • Spur
  • Herringbone
  • Sprocket
  • Double Helical
  • Rack
  • Internal
  • Spline
  • And many more
  • MAAG 350/500 Shaper
  • Scheiss 20’ VBM
  • Various Hobs
  • Hofler Klingelnberg Rapid 2000k
  • MAAG SH100/140 Shaper
  • MAAG SH180/300 Shaper
  • MAAG SH600/735 Shaper
  • MAAG SH450/5000 Shaper

Gear Grinding for AGMA Q12 Qualification

Our in-house gear-grinding capabilities are complemented by our Hofler Klingelnberg Rapid2000k 2M Gear Grinder and a computerized Klinglinberg gear checker for quality assurance.

Gearbox Repairs & Upgrades

From simple bearing change outs to complete rebuilds, National Gear Repair engineers and technicians are ready to assist you with a complete rebuild and repair analysis proposal prior to the rebuild. Our state-of-the-art 9,600 sq. ft. reducer repair facility meets OEM clean room requirements for both disassembly and assembly requirements. For maximum control and flexibility, we manufacture our own quality replacement gearing and components in house.

With expertise built over four decades, we’re well versed in OEM boxes including but not limited to:

  • Babcock & Wilcox
  • Boston
  • Danieli
  • Dodge
  • Ecodyne
  • Elliott
  • Falk
  • Farrel
  • Flender
  • Foote Jones
  • General Electric
  • Hansen
  • Horsburgh & Scott
  • D.O. James
  • Link Belt
  • Lufkin
  • Marley
  • Philadelphia Gear
  • Pomini
  • Santasalo
  • Terry
  • Western
  • Westinghouse
  • Winsmith
  • Custom Designs
  • And many others

Precision Gear Engineering and Design

National Gear Repair's engineers help you save time and cost through exacting modifications to your gearing and gearboxes.

Armed with portable coordinate measuring machines and hardness testers, as well as an extensive gear software library, our design staff can:​​

  • Reconstruct your gearing and manufacture OEM quality replacement gear, shafts, housings, and other related components
  • Assist you with gearbox modifications from simple ratio changes to gearbox upgrades
  • ​​
  • Reverse engineer complete gearbox applications, providing a complete drop-in replacement unit


National Gear Repair machining capabilities support large components with horizontal turning capabilities up to 260’ in length and 32" swing, and our large Scheiss VBM has the ability to turn 20’ diameter. For larger volume and smaller turning requirements, our Mori Seiki CNC lathe is able to efficiently handle these production needs.

Key Equipment:

  • Sharp CNC Lathe
  • Various Engine Lathes
  • Mori Seiki NL2400Y/1250 CNC Lathe
  • Scheiss VBMs
  • Super Mill HBM
  • Various Key Seaters, Grinders, Thread Mills, and Horizontal Broaches