In CNC machining, achieving dimensional accuracy goes far beyond machining a single part within tolerance. One of the most common—and costly—issues in industrial manufacturing is tolerance stack-up. When multiple machined components are assembled together, even small dimensional variations can accumulate, leading to misalignment, premature wear, vibration, or complete assembly failure.
Understanding tolerance stack-up is critical for manufacturers operating in mechanical, automotive, medical, food, construction, and contractor-based industries. At FIESCO, precision CNC machining and engineering support work together to minimize these risks from the design phase through production.
Learn more about FIESCO’s capabilities at:
👉 https://fiesco.mx/
What Is Tolerance Stack-Up?
Tolerance stack-up occurs when individual dimensional tolerances of multiple parts accumulate in an assembly. Even if every part meets its specified tolerance, the combined variation can cause functional issues.
For example, an assembly consisting of five components—each with a ±0.1 mm tolerance—could result in a total variation of ±0.5 mm. In precision applications, that deviation can compromise performance or safety.
Why Tolerance Stack-Up Is a Major CNC Manufacturing Challenge
Tolerance stack-up affects multiple industries:
- Mechanical Industry: Shaft misalignment, gear wear, vibration
- Automotive Manufacturing: Poor fit, noise, reduced component lifespan
- Medical Devices: Loss of precision in surgical or diagnostic equipment
- Food Industry Equipment: Improper sealing, hygiene risks
- Construction Machinery: Structural misalignment and fatigue
- U.S. Contractors: On-site installation delays and rework
FIESCO supports these sectors with Mechanical Industry CNC Services, delivering precision machining and engineering alignment.
👉 https://fiesco.mx/industries/mechanical-industry/
How CNC Machining Reduces Tolerance Stack-Up
1. Precision Machining with Tight Control
Advanced CNC machining allows tighter tolerances and repeatability, reducing dimensional variation across production runs.
2. Engineering Review & Design Optimization
FIESCO engineers review designs for manufacturability, identifying areas where tolerances can be tightened or redistributed.
3. Datum-Based Machining
Using consistent datum references ensures dimensional consistency across parts.
4. Integrated Finishing Processes
Finishing services such as grinding and surface treatment refine critical dimensions after machining.
Why FIESCO Is the Right Partner
FIESCO combines precision CNC machining, engineering support, and turnkey manufacturing to eliminate tolerance-related failures before they happen.
📩 Request your quote today:
👉 https://fiesco.mx/contact/
