Thin-wall metal fabrication presents a common design challenge: standard tapping doesn’t leave enough material for strong thread engagement, while secondary fasteners like weld nuts or rivnut inserts add extra labor, potential weld spatter, and spin-out risks. As production scales up, these traditional workarounds often create bottlenecks.
Overcoming these structural limitations requires strategic collaboration between tooling innovators and fabrication engineers. For nearly two decades, Fraser Steel and Formdrill have partnered to create strong, reliable threaded joints without adding secondary hardware.
Here’s how this long-standing partnership brings together process innovation, tooling expertise, and upstream engineering to elevate modern component design.
Overcoming Thin Walls & Secondary Hardware
Design engineers working with thin-walled steel, aluminum, or tubing frequently run into the physical constraint that standard tapping leaves only one or two threads engaged, making joints susceptible to stripping under torque.
Historically, fabricators turned to secondary fasteners like weld nuts or rivnut inserts. While functional, these workarounds introduce secondary labor, heat-affected zones (HAZ) that can weaken parent metal, weld spatter, and the risk of hardware spin-out during final assembly.
“Before adopting friction drilling in 2006 to meet a specific customer requirement, we relied on manual methods like bench drill presses, which made it difficult to scale production or maintain accuracy,” recalls Ian Graziano, Quality Technician at Fraser Steel. “Transitioning to Formdrill allowed us to remove operator variation and achieve consistent, scalable quality across high-volume production runs.”
The Science Behind Friction Drilling
Rather than cutting away material, friction drilling (also known as thermal or form drilling) utilizes rotational speed and axial pressure to plasticize the parent metal. The solid carbide tool creates localized frictional heat, reshaping the metal downward into a smooth, thick bushing that triples the local wall thickness. A roll-form tap then cold-works threads directly into the extended bushing.
The process offers several distinct metallurgical advantages:
- Continuous Grain Flow: Because metal is displaced rather than cut, the continuous grain structure of the parent material remains intact, avoiding the structural weaknesses associated with welded attachments.
- Work-Hardened Strength: The cold-forming action work-hardens the material, delivering superior pull-out strength and torque resistance compared to standard tapped holes or inserts.
- Chipless & Clean: The process produces zero metal shavings or chips, making it ideal for clean-critical and fluid-handling applications.
“Formdrill technology has remained relevant for over 50 years because it addresses core manufacturing hurdles: eliminating secondary steps, improving throughput, and creating high-strength threads directly in parent material,” explains C. Todd Bieri, Vice President of Business & Operations at Formdrill. “When a fabricator standardizes on the tooling across multiple machining centers, it validates that the process has become a true strategic advantage.”
Upstream Engineering & Workflow Synergy
The true value of industry leadership happens when tooling capability meets creative manufacturing engineering. Fraser Steel integrates Formdrill tooling across three CNC machining centers operating nearly 24 hours a day, using Formdrill’s online setup configurators during the initial quoting stage to optimize speed, feed, and lubrication parameters for various alloys.
By integrating friction drilling directly into primary fabrication, such as the laser cutting phase, Fraser Steel eliminates extra part handling, transport, and staging steps.
This collaborative approach lets Fraser Steel tackle complex engineering challenges for demanding industries.
Case Study: Data Centers & Upstream Roll Forming
In high-reliability sectors like data center infrastructure, components for primary and secondary liquid cooling systems require leak-free integrity and zero internal debris. Friction drilling provides the clean, dependable thread strength needed.
Fraser Steel’s team also takes it further by combining friction drilling with upstream forming operations.
“On a recent project for a major OEM, we combined form drilling with radius roll forming by placing the drilling process upstream, performing it before the bending operation,” shares Steve Owens, Vice President of New Business Development at Fraser Steel.
“Because the formed thread geometry holds its shape during bending, we eliminated secondary setups. That upstream innovation lowered production costs for the customer and helped us secure the contract.”
A Shared Commitment to Process Optimization
By pairing Formdrill’s thermal drilling technology with Fraser Steel’s CNC automation and engineering integration, OEM partners get stronger structural joints, streamlined workflows, and repeatable precision.
To explore how thermal friction drilling can optimize your tube assemblies, learn more about Fraser Steel’s CNC milling and form drilling services, or connect with our team to evaluate your part prints.