Außenmikrometers

Außenmikrometers, often shortened to Mikrometer, are precision measuring instruments used to determine the external size of an object. They are designed to achieve very high accuracy, typically in the range of micrometers. The basic principle of operation involves a precisely machined screw thread. As the thimble rotates, it moves the spindle closer to or further from the anvil, allowing for the measurement of the gap between them.

The main components of an Außenmikrometer include a fixed anvil, a movable spindle, a graduated sleeve, and a thimble with a vernier scale. The sleeve contains the main scale, usually marked in millimeters or inches, while the thimble has finer divisions that indicate fractions of the smallest division on the sleeve. A ratchet stop is often incorporated to ensure consistent measuring pressure, preventing damage to the instrument or the workpiece and ensuring repeatable measurements.

Außenmikrometers are widely used in manufacturing, engineering, and quality control for applications such as measuring the diameter of shafts, the thickness of materials, and the dimensions of machined parts. They are favored for their accuracy and reliability when precise measurements are required. Different types of Außenmikrometers exist, including those for general-purpose measurements, specialized applications like screw thread measurement, and those with digital readouts for easier data acquisition. Regular calibration and proper handling are essential to maintain the accuracy of an Außenmikrometer.