How Precision CNC Machining Drives Innovation in Powertrain and Fuel Systems

Ralph RhysonFebruary 23, 20240 comments

In today’s fast-moving automotive and industrial markets, the demand for performance, efficiency, and durability is higher than ever. Whether it’s an engine flywheel, a fuel system fitting, or a powertrain bracket — every component must perform with absolute consistency and precision.

At Sterling Industries, we believe that precision CNC machining isn’t just a manufacturing process — it’s a foundation for innovation. Here’s how our machining capabilities help OEMs and Tier 1 suppliers push the boundaries of what’s possible in powertrain and fuel system design.

🛠 The Modern Manufacturing Challenge

Powertrain and fuel system components are exposed to extreme conditions — high temperatures, pressures, vibrations, and mechanical stress. This means they need to be:

  • Dimensionally exact
  • Made from performance-grade materials
  • Manufactured with tight tolerances
  • Built to integrate seamlessly with other complex parts

Delivering components to these specifications at scale requires not just capable equipment — but the right expertise, inspection systems, and workflows.

⚙️ CNC Precision: The Heart of Our Process

At Sterling Industries, our advanced CNC machining centers are built to deliver the accuracy required for today’s complex applications.

✅ What Sets Our Machining Apart:

  • Vertical & Horizontal Milling (Up to 1000mm Cube)
    Full 4th-axis and 3+1 capabilities let us machine complex part geometries with minimal setups, ideal for housings, brackets, and adapter plates.
  • CNC Turning (Up to 800mm Diameter)
    Live tooling and multi-axis capabilities allow us to produce concentric, high-integrity powertrain components such as pulleys, hubs, and adapters.
  • Swiss Turning (Up to Ø32mm)
    Perfect for fuel system and brake fittings, threaded shafts, and high-speed precision parts with long length-to-diameter ratios.

🔍 Case Example: Fuel System Innovation

One of our long-term clients in the fuel systems sector needed to develop a new high-pressure valve body for a next-gen engine platform. The challenge? Tight dimensional control on multiple internal bores, with zero tolerance for leaks or misalignment.

Using our Swiss turning capabilities, DFM consultation, and prototype testing, we delivered first-article approval within 3 days — and scaled to 2,000 parts per month, holding ±0.0005″ on key features.

The result: Faster time-to-market for the customer, with performance and quality that exceeded spec.

🧪 Quality Assurance: More Than a Checkbox

Precision isn’t just about hitting measurements. It’s about repeatability, traceability, and confidence.

Our ISO 9001:2015-certified facilities use:

  • Dual Dmis Coordinate Measuring Machines (CMMs)
  • Oasis Vision System for small part inspection
  • OGP QL-30 Comparator for profile validation
  • Detailed runout and balance testing for rotational parts

This ensures that every component we produce is 100% verified — whether it’s the first part or the 3,000th.

📈 Driving Innovation Through Partnership

Innovation isn’t just in the parts we make — it’s in how we work with our customers.

Sterling Industries provides:

  • DFM input during design
  • Rapid prototyping using our toolroom and CAM software
  • Custom fixturing for complex part stability
  • Flexible lead times for both prototype and production

We’re not just a supplier — we’re a precision partner.

🏁 Final Thoughts

In fuel and powertrain systems, there’s no margin for error. At Sterling, we combine decades of machining experience with cutting-edge technology to deliver components that keep your systems running — stronger, longer, and more efficiently.

If you’re designing or sourcing precision-machined parts, especially for high-performance systems, let’s talk.

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Travis Watson

Travis Watson is a results-driven business executive with a strong background in strategic growth, operational excellence, and servant leadership. He has led engineering and manufacturing teams across industries such as aerospace, clean energy, and high-performance vehicles, delivering significant improvements in performance, sales, and quality systems. With experience in roles ranging from Account Manager, Plant Manager to Director of Sales and Operations, Travis has overseen ERP implementations, contract negotiations, and cross-functional team development. His leadership has consistently driven efficiency, employee engagement, and profitability. Travis holds dual Bachelor of Science degrees in Marketing and Distribution Management from Indiana University’s Kelley School of Business. He is a Six Sigma Green Belt, CAPM certified, and holds a CPIM designation. Known for developing people and driving strategic execution, he has been a key contributor to multiple high-performing teams.

Joe Johnson

Joe is a highly accomplished engineering and business leader with decades of experience in mechanical engineering, manufacturing, aerospace, and business development. His career began at Delta Faucet Co., where he honed his skills before moving on to Cummins Engine Co. as a Fuel Systems Product Engineer. He further advanced his expertise as an afterburner specialist for Pratt & Whitney Aircraft.

As a seasoned entrepreneur, Joe co-founded ReGin Manufacturing, successfully growing the company into a $10 million enterprise before its acquisition. He later served as the Engineering Manager at Advance Aero Inc..

Recently, Joe transitioned from his role as Director of Operations at Paramount Industrial and Sterling Industries to become the Director of Business Development and Engineering. In this role he is focused on supporting strategic growth and leveraging his extensive background to drive innovation and success in the industry.

Joe Hetzer

Joe Hetzer brings over three decades of extensive experience in the manufacturing sector, with a specialized focus on the aerospace and automotive industries. Throughout his career, Joe has demonstrated a profound commitment to engineering and manufacturing excellence, making significant contributions to various projects and initiatives.

As a team builder, Joe employs a servant leadership approach, fostering an environment where collaboration and growth are paramount. His ability to inspire and empower teams has made him a respected leader in his field, driving innovation and operational improvements.
A recognized change agent, Joe is dedicated to maximizing productivity and efficiency within organizations. His strategic mindset and hands-on experience enable him to implement effective processes that not only enhance performance but also promote sustainability in manufacturing practices.

With a passion for developing talent and a keen eye for industry trends, Joe Hetzer continues to make a meaningful impact in the manufacturing landscape, ensuring that teams are well-equipped to meet the challenges of today and tomorrow.

Peter C. Ariens

Peter C. Ariens is the Chief Executive Officer of NuMA Group, Inc., a private holding company engaged in the automotive, aerospace, defense, recreational, and heavy-duty industries. Under his leadership, NuMA encompasses several companies that manufacture and distribute critical components for some of the world's largest enterprises, with four manufacturing facilities located in Indiana.Before his role at NuMA Group, Peter served as President of Stens Corporation for 18 years, where he led the international parts manufacturing and distribution company until its acquisition by private equity in 2016.In addition to his executive role at NuMA, Peter actively contributes to various for-profit and non-profit boards, including:Two Ladders, Tell City, Indiana
South Central Inc., Evansville, Indiana
Toolsey, Inc., Indianapolis
He is also a member of professional organizations such as Vistage International and the Alliance of Indiana, affiliated with the IU Kelley School of Business. Previously, Peter held the position of Treasurer on the Trieste board.
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Shelia Rossmann

Shelia Rossmann is the Owner and President of Sterling Industries, Inc. and Paramount Industrial, Inc., where she has established herself as an accomplished and results-oriented businesswoman in the manufacturing sector. As a Senior Manufacturing Executive, Shelia leads her woman-owned businesses with a commitment to excellence and innovation.
Her remarkable achievements in the industry were recognized when she won the prestigious Entrepreneur of the Year award in 2013 for Manufacturing in Michigan and North West Ohio, presented by Ernst & Young. This accolade highlights her dedication to driving growth and operational success in her companies, making significant contributions to the manufacturing landscape.
Shelia’s leadership continues to inspire others in the industry, showcasing the impact of women in business and the importance of resilience and strategic vision in achieving success.

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