What is a Inside diameter measuring instrument?

An internal diameter measuring device is a device that measures the internal diameter of a hole. Among these, the hole test is one of the most representative. The hole test measures the inner diameter by inserting two or three probes into a hole. By turning the dial, the probe expands and stops when it hits the inside of the hole. By measuring that position, you can find the inner diameter. The advantage of this method is that measurements can be made with high precision and low variation. However, the equipment itself is expensive and requires calibration. Additionally, because the measurement range is narrow, multiple devices may be required depending on the target.

In addition to the hole test, there are other types of internal diameter measuring instruments such as internal micrometers and cylinder gauges. The inside micrometer measures the length of the diameter by touching both ends of the hole. On the other hand, cylinder gauges are suitable for measuring deep holes with small inner diameters, and have a structure in which only the probe goes into the hole and the measured value is read externally.

Application of Inside diameter measuring instrument

The inner diameter measuring instrument is a device used in various situations. In particular, it is used to measure the inner diameter of products manufactured or processed in the factory. Holes of various sizes are required in the manufacturing process of the product. This is because it is necessary to connect the parts together and pass the wiring. Accurate measurement is required because even a slight deviation in the size of the hole may prevent the parts from joining, causing failures or defects. The hole test can measure finely up to several μm, and is suitable for measuring the accurate inner diameter of holes and pipes. It is also used to improve safety by accurately measuring screw holes to enable strong coupling.

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