välismikromeetrid

Välismikromeetrid are a type of measuring instrument used to determine external dimensions. The name "välismikromeetrid" is derived from Estonian, meaning "external micrometers." These precision tools are essential in manufacturing, engineering, and scientific fields for accurate measurements of length, diameter, and thickness.

The basic principle of a välismikromeeter involves a screw mechanism. A precisely machined screw thread allows for very fine adjustments. The instrument typically consists of a C-shaped frame, a spindle, an anvil, a sleeve, and a thimble. The spindle moves in and out when the thimble is rotated. The sleeve contains a graduated scale, and the thimble also has markings, allowing for readings to be taken with high accuracy, often to hundredths or thousandths of a millimeter or inch.

To use a välismikromeeter, the object to be measured is placed between the anvil and the spindle. The thimble is then rotated until the spindle just touches the object. A ratchet mechanism is often incorporated to ensure consistent pressure, preventing over-tightening and thus maintaining measurement accuracy. The measurement is then read from the scales on the sleeve and thimble.

Välismikromeetrid are available in various sizes and configurations to suit different measurement ranges and applications. They are crucial for quality control, ensuring that manufactured parts meet precise specifications and tolerances. Their accuracy makes them indispensable for tasks requiring meticulous dimensional checks.