What is a common method to store a micrometer to ensure its longevity?

Storing a micrometer with a gap between the spindle and anvil is important because it helps prevent wear and deformation over time. When a micrometer is kept in a compressed state, such as with the spindle pressed against the anvil, it can lead to unnecessary stress on the measuring surfaces. This stress can result in wear, affecting the accuracy of the tool. Additionally, environmental factors like humidity and dust can have more of an impact if the micrometer is stored under tension, as they could infiltrate the device and cause corrosion or debris buildup.

By maintaining a gap, the precision surfaces are safeguarded against distortion and contamination, thereby ensuring that the micrometer remains accurate and functional for future measurements. This practice is crucial for preserving the instrument's integrity and extends its operational lifespan.