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What is the Tightest Tolerance for a Precision Machining Company?
Precision machining is a critical field where the ability to produce parts with extremely tight tolerances can make all the difference. But what exactly defines the "tightest" tolerance, and how close can manufacturers get? Let’s explore the limits of precision machining and what it takes to achieve them.
Tolerances are typically measured in microns (μm) or thousandths of an inch (0.001"). While standard machining operations often operate within +/- 2-5 thousandths of an inch, the most advanced precision machining pushes these limits to just a few microns. In fact, anything under 10 microns is considered extremely tight, and top-tier machine shops routinely hold tolerances of 5 microns or less on complex components.
The medical device industry is one of the biggest users of ultra-precise machining. Implants, surgical tools, and diagnostic equipment require tolerances at the micron level. Even the smallest deviation can lead to failure in a life-critical application. For example, in laser eye surgery, parts must be machined to 1–3 microns to ensure perfect alignment and performance.
Similarly, the aerospace sector demands some of the strictest tolerances in the world. Components used in spacecraft, jet engines, and other high-performance systems often need tolerances as tight as 2 microns or less. These precise dimensions are essential for weight reduction, aerodynamics, and overall system reliability.
While achieving tolerances below 1 micron is possible, it requires specialized equipment, controlled environments, and highly refined processes. Factors like thermal expansion, vibration, and tool wear can all affect accuracy, even on the most advanced CNC machines. For most applications, 2–5 microns remains the practical limit that can be consistently achieved.
At Cheetah Precision Machining, we specialize in pushing the boundaries of precision. With advanced 5-axis milling, rigorous quality control, and years of experience, we’re equipped to handle even the most demanding tolerance requirements. Whether you need prototypes or full-scale production, we provide reliable, high-precision solutions tailored to your needs.
Contact us today at (651) 633-4566 to learn more about our capabilities and how we can help meet your toughest tolerance challenges. Click here to discover more about our services and commitment to excellence.