Obsolete Gearbox? Repair & Replace It Without Slowing Down Your Operation
Repairs, drop-in and retrofit solutions backed by engineering support to keep your operation running.
Built to Replace Discontinued Gearboxes
When OEM parts or complete gear units are no longer available, replacing existing equipment can become a challenge...
Riverside Spline & Gear, a Sumitomo Drive Technologies company, supports obsolete gearbox replacement with engineered solutions that match your existing system requirements. From drop-in replacements to reverse-engineered units, each solution is built to align with your application, mounting configuration, and performance needs.
What this means for your team:
- Replace units without major system modifications
- Maintain fit, function, and operating requirements
- Move forward even without original documentation
- Reduce delays tied to sourcing or redesign
Review our sections that outline a key part of replacing obsolete gearboxes, including compatibility, manufacturing, material readiness, inspection, and emergency response.
Engineered to Match Existing Gearbox Specifications
Replacement solutions aligned with dimensional, mechanical, and performance requirements.
Replacing an obsolete gearbox requires more than matching a part number. Key factors such as center distance, shaft alignment, ratios, and load conditions must be evaluated to ensure proper fit and performance. Each replacement is developed to integrate with your existing system without introducing misalignment or the need for major modifications.
In-House Manufacturing Capabilities
Manufacturing is handled in-house to maintain control over quality, scheduling, and turnaround. Core processes are performed within a single workflow, reducing delays and ensuring consistency from start to finish.
Turning
- Multiple CNC turning centers with large capacity capability
- Produces precision blanks and finished components
- Supports continuous operation for high-priority jobs
Milling
- CNC and manual milling for custom geometries and features
- Supports pre-cut machining prior to hobbing, shaping, or grinding
- Enables fast setup changes for varying part requirements
Hobbing
- CNC and manual gear hobbing operations
- Supports internal and external gear profiles
- In-house tooling helps accelerate downstream processes
Shaping
- Gear shaping for internal and external profiles
- Extended stroke capacity for larger components
- Supports higher-volume and complex geometries
Precision Grinding
- OD, ID, cylindrical, and surface grinding performed in-house
- Controls final geometry, surface finish, and tolerance alignment
- Supports preparation and finishing prior to gear grinding
Gear Grinding
- Dedicated gear grinding center with on-board checking
- Capable of handling large-diameter gears
- Supports AGMA Q15, DIN 2, and AGMA AA2 quality levels
EDM
- CNC wire EDM used for precision keyways and internal features
- Maintains alignment between critical interfaces and components
- Used where traditional broaching or pulling is not suitable
Gear Assembly Services
Assembly reduces the need for on-site fitting and adjustment, allowing components to be installed with greater confidence.
Riverside provides assembly of gears on shafts and shaft pinions to improve accuracy and reduce downstream handling. Assembly services include controlled shrink-fit processes using heat and, when required, shaft cooling.
Shrink-fit assembly is supported up to .002 inches per inch of shaft diameter. Assembly prior to final tooth grinding ensures accurate alignment of the pitch cylinder to the shaft axis, reducing issues such as gear wobble or orientation errors. This process improves finished gear quality and simplifies installation for the customer.
Emergency Gear Replacement
We Work Across a Wide Range of Gearbox Manufacturers
Sumitomo supports repair, rebuild, and replacement of gearboxes across a wide range of OEM manufacturers. Experience with legacy and discontinued units allows us to evaluate and support applications regardless of original supplier.
- Amarillo
- Baulmuller
- Black Clawson
- Bonfiglioli
- Brevini
- Browning
- California Pellet
- Camco Ferguson
- Cincinnati
- Cone Drive
- David Brown
- Davis Standard
- Dodge
- De’Ran
- Dover
- Drive All
- Eagle Iron Works
- Extruder Gearbox Repair
- Falk Gearbox Repair
- Flender
- Foote Jones
- GE
- Gloucester
- Hansen
- Horsburgh Scott
- Jupiter
- Kissling
- Keller
- Koellmann
- Kone Crane
- Krauss Maffei
- Liebherr
- Lightnin
- Link Belt
- Lohmann
- Lufkin
- Marley
- Mclanahan
- Neptune
- Nord
- NRM
- Nuttall
- Philadelphia
- P&H
- Piv Drive
- Planetary
- Raymond Mill
- Rexnord
- Santasalo
- Saturn
- SEW Euro Drive
- Sterling
- Symetro
- Terex Comedil
- Titan
- Toshiba
- Thyssen
- Voeller
- Werner Pfleiderer
- Westech
- Western
- Winsmith
- Zambello
Connect With Riverside Spline & Gear
Outdated gearboxes create production risk. When replacements are difficult to source, downtime stretches longer and output suffers. Riverside delivers fit-ready replacement solutions that help you get back online without redesigning your equipment.