Kunshan buried Sanfeng three-point internal micrometer

Kunshan buried Sanfeng three-point internal micrometer Kunshan buried Sanfeng three-point internal micrometer

In the fields of mechanical processing, automotive manufacturing, and precision instrument production, the precise measurement of internal dimensions directly affects the assembly accuracy and performance of products, and the three-point inside micrometer is a professional measuring tool that meets this core requirement. With its unique structural design, it effectively solves the problem of being easily affected by workpiece roundness and cylindricity errors in traditional two-point measurement methods, and has become a key equipment in high-precision internal dimension detection scenarios.

The core advantage of this measuring tool comes from its three-point contact measurement structure. Unlike two-point measurement, which can only determine a straight line, three-point measurement can construct a stable geometric reference that is more in line with the actual shape of circular workpieces such as inner holes. It can largely offset the interference of workpiece shape deviation on measurement results and significantly improve the reliability of measurement data. Its structure mainly consists of a measuring head, a differential cylinder, a fixed sleeve, and a ruler body. The measuring head is usually made of high-strength wear-resistant materials to ensure that the measurement accuracy can be maintained after long-term use; The differential cylinder achieves small displacement adjustment through a precision threaded structure, and with the scale on the fixed sleeve, it can achieve micrometer level readings, meeting high-precision measurement requirements.

In practical operation, the usage process is rigorous and standardized. Firstly, it is necessary to clean the measuring head and the surface of the measured workpiece to avoid impurities affecting the measurement accuracy; Then slowly adjust the differential cylinder to open the measuring head slightly smaller than the measured internal size, and smoothly place it into the measured area to ensure that the three measuring heads evenly contact the inner wall of the workpiece without tilting or unilateral force; Finally, a measurement is completed by overlaying the scale of the differential cylinder and the fixed sleeve to read the value. To ensure data accuracy, measurements are usually taken multiple times at different locations and the average is taken.

In addition to conventional internal hole measurements, three-point inside micrometers can also be used to detect the internal dimensions of key components such as bearing inner rings, gear inner holes, cylinder liners, etc. They are widely used in industries such as aerospace and medical equipment that require high precision. Its excellent precision stability and applicability make it an important tool for ensuring product quality in industrial production, providing precise data support for subsequent processing and assembly, and helping to improve overall production efficiency and product qualification rate.