Providing gearing solutions for more than a century. Philadelphia Gear: Local service. National support. Global expertise.
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Philadelphia Gear's history in the marine industry dates back to the early-20th century, providing gears, sprockets, and transmissions for U.S. ships during the First World War. Our role in this industry has grown since then, from ring and worm gearing for Navy destroyers in World War II, to our marine gear drives that power the icebreakers, warships and work boats of today.


Philadelphia Gear has been a supplier of main reduction gearing to the U.S. Navy and Coast Guard for over 70 years. The current active programs include the design and manufacture of the main propulsion drives for the San Antonio Class (LPD-17) of ships. In addition, our designs and manufactured couplings are used in the propulsion trains of Virginia Class (SSN774) of submarines. And our Synchrotorque® hyrdoviscous drive has proven to be a versatile addition to our marine efforts, functioning as wet clutches, wet brakes, torque control devices or variable speed drives.


Most recently, Philadelphia Gear has purchased the majority of General Electric Corporation’s non-nuclear marine gear product lines. This acquisition provides the right to intellectual property, equipment, and transition assistance to broaden existing capabilities to manufacture main reduction gear assemblies including the following classes of ships: USS Arleigh Burke (DDG 51), USS Freedom (LCS 1), and USS America (LHA 6).

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In support of the acquisition, Philadelphia Gear has opened a newly renovated, state-of-the-art 120,000 sq. ft. facility in Santa Fe Springs, CA that will serve as the hub for military marine projects. For more details on our newest service and manufacturing center click here.


Click here for more information on Philadelphia Gear’s purchase of General Electric Corporation’s non-nuclear marine gear product lines


Read the case study Philadelphia Gear Services an Existing MRG Installation


Philadelphia Gear provides gearing and service for the following companies and agencies:

USS America - LHA 6 Rendering

USS Arleigh Burke (DDG 51)



Commercial & Military Marine

Bath Iron Works (
Bean Dredging (
China Shipbuilding (
Crowley Marine (
Egyptian Navy (
Great Lakes Dredge (
Halter Marine (
Kvaerner Eureka (
Marine Specialties (
Marinette Marine (
Maritrans (

Navistar International (

Northrop Grumman (
Port Authority of Houston (


Royal Australian Navy (

Royal Canadian Navy (
Rowan Companies (
Sargeant Marine (
Sealand Power (
Trico Marine (
Tyco Submarine (


Government Agencies

Norfolk Naval Shipyard (

Pearl Harbor Naval Shipyard (

U.S. Army (
U.S. Coast Guard (
U.S. Navy (


USS Freedom (LCS1)

USS San Antonio (LPD 17)

Virginia (SSN 774) Attack Submarine


With international offices in Asia, Europe, Latin America, and the Middle East, as well as U.S. regional facilities in the northeast, southeast, Midwest, gulf coast, and west coast, Philadelphia Gear is uniquely positioned to meet the high gearbox repair demands of national and global industrial operations. For more than a century, titans in the petrochemical, refining, pipeline, mining, power generation, water management, and marine industries all over the world have relied on Philadelphia Gear’s gearbox repair services to ensure their domestic and foreign brand power transmission equipment runs consistently at full capacity. Local service, national support, and global expertise, Philadelphia Gear is the choice source for inspection and measurement, engineering evaluation, repairs, spin and load testing, uprating, reverse engineering, and more. Click here for the contact information of the Philadelphia Gear facility nearest you.

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Gearbox Repair and Overhaul | Full Disassembly & Cleaning | Inspection & Measurement | Engineering Evaluation & Recommendations | Upgrading & Modifications | Reverse Engineering

Performance, Spin, and Load Test | Reinstallation & Inspection | Repair of Philadelphia Gear & Subsidiary Gearboxes | Repair of Other Brand Name Gearboxes | RapidGear Emergency Repair Service

Industry Applications for Gearbox Repair | Gearbox Repair for the Pipeline Applications | Gearbox Repair for the Power Generation Industry | Gearbox Repair for Crude Oil Refining

U.S. Coast Guard Gearbox Repair | Gearbox Repair for the United States Navy

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