What is a micrometer?

A micrometer, also known as a micrometer, is a high-precision measuring instrument for determining small distances and diameters. It is used in particular for measuring shafts, bolts, pipes and other cylindrical objects. Unlike an ordinary ruler or tape measure, the micrometer allows measurements in the range of a few hundredths to thousandths of a millimetre - ideal for situations where exact measurements are crucial.

Who needs a micrometer?

A micrometer is not only important in industrial production, but is also a useful tool for hobby craftsmen and semi-professional users who value precision. Anyone working in model making, for example, working on engines or wanting to produce precision-fit components will quickly appreciate the advantages of a micrometer. A micrometer is particularly indispensable for testing materials and for the final inspection of workpieces.

What are the advantages of a micrometer compared to a caliper gauge?

A frequent comparison partner of the micrometer is the caliper gauge - also a popular tool for length measurements. However, in a direct comparison, the micrometer scores with its higher measuring accuracy. While a good caliper gauge measures to an accuracy of around 0.05 mm, a micrometer easily achieves measuring accuracies of 0.01 mm or better. In addition, the micrometer offers a very even measuring force thanks to its spindle mechanism, which leads to more consistent and reliable results - especially with sensitive workpieces.

What should you look for when buying a micrometer?

There are a few important points to consider when buying a micrometer. Firstly, you should consider whether you prefer an analogue or digital model. Digital micrometers offer the advantage of easier readability and often also additional functions such as data transmission. Also important are

• Measuring range: Standard micrometers usually cover 0-25 mm. There are variants with extended ranges for larger objects.
• Accuracy: Ensure certified accuracy, ideally in accordance with DIN standards.
• Workmanship: High-quality materials and solid construction ensure durability and reliable measurements.
• Ratchet or friction drive: These mechanisms ensure a uniform measuring force and prevent measuring errors.
• Accessories: A case, calibration gauge and possibly spare batteries for digital versions are useful extras.

Conclusion

A micrometer is a precise, reliable tool for anyone who wants to work with maximum accuracy. Hobby craftsmen and semi-professional tinkerers in particular benefit from the ability to recognise even the smallest deviations in diameter. Compared to calipers, the micrometer offers superior precision and is therefore the better choice for many applications. If you pay attention to quality, suitable features and ease of use when selecting a micrometer, you will enjoy using it for a long time.

Read measured values correctly

Micrometers are used to measure the diameter of shafts, pipes, bolts, etc. The correct reading of the measured value requires a little practice as well as an understanding of the structure and the associated measuring principle of a micrometer. In our guide, we show you how to read the measured values from a micrometer correctly.