North American Precision Splines and Gear Manufacturing
Strengthening your supply chain with vertically integrated domestic production of precision gears and splined components.
Overcoming the Hidden Costs of Offshore Sourcing
Offshore precision components often carry "hidden costs" that do not appear on a standard quote sheet. Extended lead times, excess inventory requirements, and the constant risk of global supply disruption are real, quantifiable expenses for North American manufacturers.
In January 2026, Sumitomo Drive Technologies made a strategic move to change that equation for our customers. By acquiring Riverside Spline & Gear, we have expanded access to domestic precision gearing capacity, allowing you to reduce reliance on fragile global supply lines and protect your production schedules.
Specialized Precision Gear Cutting and Spline Manufacturing
Riverside has built an industry reputation on speed and quality. Now a Sumitomo Drive Technologies company, this Michigan-based facility provides:
Precision Spline Manufacturing
High-tolerance splined components across a wide range of industrial specifications.
Custom Gear Cutting
Specialized precision gear production designed for consistent, real-world performance.
Vertical Integration
Domestic production depth that supports Total Cost of Ownership goals without introducing new variables into your sourcing strategy.
Seamless Transition
Transition work from offshore suppliers while maintaining established quality standards and realistic lead time expectations.
Nearshoring for a Resilient, Sustainable Supply Chain
As manufacturers bring more production home, the foundational infrastructure supporting them must evolve. Precision gearing is a cornerstone of that infrastructure. Our nearshoring approach gives you greater control over outcomes—helping you protect schedules, manage risk, and make sourcing decisions that hold up under real operating conditions.
Domestic Capacity Backed by Global Infrastructure
Your precision components are backed by the extensive infrastructure and engineering support of Sumitomo Drive Technologies. We operate a comprehensive network of U.S. facilities to ensure reliability and proximity to your operations:
Chesapeake, Virginia: North American Headquarters.
Verona, Virginia: Large Industrial Gear Unit Manufacturing and Assembly Facility.
Glendale Heights, Illinois: Regional assembly and Midwest inventory hub.
Lufkin, Texas: Specialized manufacturing and service center for the South-Central corridor.
Marine City, Michigan: Specialist center for high-tolerance precision splines and gear cutting.
