There are few names in metrology that carry the same authority as Mitutoyo. For those of us working with precision measurement every day, their instruments are not just tools, they are a benchmark. Having the opportunity, as H Roberts & Sons, to visit one of Mitutoyo’s manufacturing facilities in Japan, just outside Hiroshima, was a genuinely valuable experience.

Where Micrometers Are Made

During our visit, we were given an in-depth look at the production of Mitutoyo micrometers and bore micrometers, both analogue and digital. Seeing these instruments at the source gives a completely different appreciation for the level of engineering behind them.

What stood out immediately was the balance between advanced automation and skilled craftsmanship. While modern machinery ensures consistency, many critical stages still rely on experienced technicians. Precision at this level cannot be left entirely to automation. It requires expertise and careful oversight.

Each component is manufactured to extremely tight tolerances. From spindle and anvil faces to ratchet mechanisms, every part is carefully controlled, measured, and verified. It reinforced exactly why Mitutoyo instruments are trusted across industries worldwide.

Analogue and Digital: Built to the Same Standard

One of the most interesting takeaways from our visit was the equal importance placed on analogue and digital micrometers. Despite the continued shift toward digital solutions, analogue instruments remain a vital part of many workshops, and Mitutoyo clearly continues to invest in both.

Both types are produced with the same philosophy:
accuracy, repeatability, and long-term reliability.

It is not about replacing one with the other, but ensuring that whichever tool is used, it performs to the highest standard.

Bore Micrometers: Precision from the Inside Out

The manufacturing of bore micrometers was particularly fascinating. Measuring internal diameters introduces additional complexity, and the design reflects that.

Interchangeable heads, extension rods, and finely calibrated contact points must all work seamlessly together. Seeing the level of inspection and testing involved gave real insight into the consistency these tools deliver in demanding environments.

Visiting the Founder’s Birthplace

As part of the trip, we also visited the temple where Mitutoyo’s founder was born.

Set in a calm and traditional environment, it offered a very different perspective compared to the factory. However, there is a clear connection between the two. The same sense of discipline, attention to detail, and long-term thinking is evident in both the company’s origins and its modern-day operations.

It highlighted that Mitutoyo is not only about manufacturing precision instruments, but also about a philosophy centred on quality, responsibility, and continuous improvement.

Final Thoughts

For H Roberts & Sons, this visit provided a deeper understanding of what goes into every Mitutoyo instrument.

Seeing the manufacturing process firsthand and learning more about the company’s heritage reinforces the confidence we have in the products we supply.

These are not just measuring tools. They are the result of decades of expertise, refinement, and an unwavering commitment to precision.

And it confirms something we already knew:
true precision is engineered into every stage of the process.