Custom Gear Manufacturing & Services
Riverside Spline & Gear provides custom gear manufacturing, reverse engineering, and repair services for industrial applications that demand accuracy and durability.
Our team works from your drawings, samples, or existing components to produce gears that meet your specifications and performance requirements.
From planned production to urgent replacement, we support projects at every stage. All core processes are handled in-house, giving you better control over lead times, quality, and consistency.
Gear Manufacturing Capabilities
- Custom gear manufacturing based on drawings, prints, or physical sample
- Reverse engineering for worn, damaged, or discontinued gears
- Gear repair services to restore existing components
- Emergency gear replacement for unplanned downtime
- Gear cutting, hobbing, shaping, and precision grinding
- Internal and external spline manufacturing
- Heat treatment coordination based on application requirements
- Assembly support for complete gear components
- Inspection and quality verification throughout production
If you’re working through a failure, sourcing a replacement, or planning a new build, share your project details through the form. Our team will review your request and follow up with next steps.
Request Support
Please fill out the form below or contact us at
(810) 643-2480
[email protected]
Want To See How We Handle It?
Review our capabilities, equipment, and process details below to understand how we support custom gear manufacturing and repair projects.
In-House Manufacturing Capabilities
Riverside’s manufacturing operations are structured to support custom gears and components across a wide range of sizes and applications. All primary machining, cutting, and finishing processes are performed internally to maintain accuracy, repeatability, and scheduling control.
Turning
Eight CNC Mazak turning centers
Multiple large capacity vertical turning centers
Produces precision blanks and turned components
Operates day and night shifts
Machinists program directly at the machine, allowing immediate adjustments and multiple programs per shift
Milling
CNC and manual milling machines
Used for blank preparation, features, and custom geometries
Supports pre-cut machining prior to hobbing, shaping, or grinding
On-machine programming enables fast setup changes and flexibility
Hobbing
CNC and manual gear hobbing machines
Operates up to 18 hours per day
In-house inventory of metric and standard hobs
Includes pre-grind depth hobs to accelerate downstream grinding
Equipment includes large-format manual hobbers such as Phauter and G&E machines
Shaping
Fellows gear shapers, including 36-inch machines with extended stroke and riser capacity
Supports internal and external gear profiles
CNC Fellows FS400-125 Hydrostroke shapers added for higher-quantity production
Precision Grinding
OD, ID, cylindrical, and surface grinding performed in-house
Precision grinding capability has been maintained internally since the late 1960s
Used to control blank geometry and surface quality prior to final gear grinding
Gear Grinding
Dedicated Gear Grinding Center
HÖFLER gear grinders equipped with on-board checking
Capable of grinding large-diameter gears
Operates extended hours to support throughput and emergency work
Supports AGMA Q15, DIN 2, and AGMA A2 quality requirements
EDM
CNC wire Electrical Discharge Machining is used for cutting keyways in gears and components
Produces accurate feature size, bottom radii, and timing alignment
Enables precise keyway placement relative to other part features
Used where traditional broaching or pulling methods are not suitable
Material Inventory
Riverside Spline & Gear maintains a broad on-site inventory of steel to support fast production starts and dependable lead times. Keeping materials in-house eliminates delays from external sourcing and allows work to begin quickly once an order is released.
Stocked materials include hardening alloys and carburizing grades commonly used in gear manufacturing, such as 4140, 4150, 4340, 8620, and 4320. A wide range of bar sizes is available to support both standard production and emergency replacement needs, helping reduce downtime when time is critical.
Precision, Inspection, and Quality Control
Inspection is integrated throughout Riverside’s manufacturing process and finalized prior to shipment or assembly. Verification focuses on critical-to-quality features to ensure each part meets customer specifications.
Inspection capabilities include on-board gear checking, off-line gear checkers, precision centers, profilometers, Rockwell hardness testing, granite inspection plates, and a wide range of calibrated measuring tools. Inspection results are recorded and retained, with certifications available upon request.
This process supports tight tolerance requirements, including AGMA and DIN standards, and ensures consistency across custom and replacement components.
Gear Assembly Services
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
Riverside Spline & Gear has supported emergency gear replacement since 1963. When equipment is down or at risk of failure, Riverside responds with short lead times designed to minimize downtime and restore operation quickly.
Material inventory, experienced machinists, and multi-shift operations allow production to begin rapidly. In many cases, machining starts within hours of receiving a purchase order. Parts often move directly from turning to heat treatment and gear cutting without delay, providing a critical advantage in breakdown situations