The dial bore gauge is a commonly used tool for precisely measuring the dimensions of inner holes.
Different models of dial bore gauge have different measurement ranges and usage characteristics. Choosing the
appropriate model is crucial for ensuring measurement accuracy and efficiency. This article will provide a detailed
analysis of the measurement range of dial bore gauge and introduce the usage features and advantages of different
models to help you make better choices and use dial bore gauge more effectively.
I. Measurement Range: Select the appropriate range to avoid measurement errors
1. The measurement range of dial bore gauge is determined by its range. The range refers to the difference
between the maximum and minimum dimensions that the micrometer can measure. Selecting the appropriate range
is crucial. An insufficiently large range will result in measurements exceeding the range, while an excessively
large range will reduce the measurement accuracy.
2. The common range of dial bore gauge varies from a few millimeters to several tens of millimeters, such as 5mm,
10mm, 25mm, 50mm, etc. When choosing the range, it should be based on the internal diameter size of the measured
workpiece to ensure that the measured size is within the range and there is a certain margin.
3. Besides the measurement range, it is also important to pay attention to the resolution of the dial indicator.
Resolution refers to the smallest size change that the dial indicator can detect. A high-resolution dial indicator
can provide more accurate measurement results.
II. Different Models: Each has its own characteristics and can meet different needs
1. Standard dial bore gauge: Simple structure, easy to operate, suitable for general precision inner diameter
measurements. The measuring rod is usually of a three-jaw structure, which can self-center and is convenient
for measurement.
2. Small range dial bore gauge: Specifically designed for measuring small-diameter workpieces, such as inner holes
smaller than 5mm. The measuring rod of this type is usually of a two-jaw structure, which is more precise.
3. Long-range dial bore gauge: Suitable for measuring workpieces with larger internal diameters, such as inner holes
larger than 50mm. The measuring rod of this type is usually longer and more sturdy to ensure measurement accuracy.
4. Dial bore gauge with fine-tuning device: It can be fine-tuned to enhance measurement accuracy.
The fine-tuning device enables us to precisely adjust the position of the measuring rod, thereby obtaining
more accurate measurement results.
5. Digital dial bore gauge: It can directly display the measurement results, eliminating the errors caused by manual
reading and enhancing the measurement efficiency. Some digital inner diameter micrometers also have data storage
and output functions, facilitating data processing and analysis.
III. Usage Characteristics and Advantages:
Choosing the Right Tool Leads to Double the Effort with Half the Work
1. High Precision: The internal diameter gauge can perform high-precision internal diameter measurements,
with an accuracy of up to 0.01mm or even higher, meeting the requirements of various precision processing.
2. Simple operation: The usage method of the internal diameter micrometer is simple and easy to learn. Even beginners
can quickly get the hang of it. Just insert the measuring rod into the inner hole of the measured workpiece,
and you can directly read the measurement result.
3. Wide application range: The dial bore gauge can measure various shapes and sizes of internal holes,
including round holes, square holes, and other irregularly shaped holes. Different models of internal diameter gauges
can cover different measurement ranges to meet various measurement requirements.
4. Relatively low price: Compared to other precision measuring instruments, the price of dial bore gauge
is relatively lower, making it an economical and practical measuring tool.
IV. Measurement Techniques: Mastering Techniques to Enhance Accuracy
1. Before measurement, clean the inner holes of the workpiece being measured and the measuring rod of
the dial indicator to prevent impurities from affecting the measurement results.
2. During the measurement process, rotate the dial indicator slowly to locate the maximum reading, which represents
the inner diameter size of the measured workpiece.
3. Taking the average of multiple measurements can reduce measurement errors and improve measurement accuracy.
V. Maintenance and Care: To extend lifespan and ensure accuracy
1. After use, wipe the dial gauge clean and apply anti-rust oil. Store it in a dry and ventilated place.
2. Avoid allowing the dial indicator to collide with hard objects or to fall, as this could damage
the measuring rod or other components.
3. Regularly check and calibrate the accuracy of the micrometer to ensure it is in optimal working condition.
