Looking to learn more about dial indicators to measure different structures? Continue reading this article till the end to know the inside-out of using dial indicators.

Dial indicators, popularly known as dial gauges, are measuring tools used for precisely measuring or comparing different objectives, linear dimensions, part tolerances, alignment of machine components, and more.

Having accurate and correct measurements for different construction or manufacturing projects can significantly affect your efforts. Precise and unerring measurement reduces the possibilities of risk, project failure, and other measuring mistakes leading to project delays and unwanted situations.

But how to read a dial indicator?

• Start by aligning the zero mark on the dial indicator with the reference point.
• Next, rotate the dial indicator's spindle until it touches the object you want to measure. Once the spindle is in contact with the object, observe the measurement displayed on the dial.
• Take note of the numbers and any additional markings on the dial. Consider any scale divisions or graduations to obtain a precise reading.
• Finally, record the measurement for future analysis or use.

However, it’s important to understand that the method to measure a dial indicator may differ based on the type and advanced features of a dial indicator. Therefore, it is vital to determine the type of dial indicator you are using to measure unique dimensional surfaces or structures.

Before getting deeper into the article, let us first understand:

What is a dial indicator?

A dial indicator is a versatile measuring device that can measure a wide range of applications across various construction or manufacturing industries. Dial indicators help accurately measure angles and distances between two flat surfaces, which is impossible to measure with the naked eye or other measuring tools.

A dial indicator is mounted on a stand or a magnetic base allowing the device to stay in one position throughout the measurement process. It consists of a clock dial with a needle or a pointer that moves to and fro in response to a change in position. 

What are the types of dial indicators?

To determine the suitable type of dial indicator, here is a list of the most commonly used types of dial indicators in the construction or manufacturing industries.

1. Plunger dial indicator

Plunger dial indicators are typically heavier and larger than most dial indicators. This type of dial indicator is most suited for repetitive and comparative-based measurements. Plunger dial indicators are also commonly used in machine setups to monitor the differences or changes in the alignment of machine parts and components. 

2. Lever dial indicator

The lever dial indicator is another popular and commonly used dial indicator. This type of indicator is perfect for measuring small measurements such as linear and geometric features on a component. Lever dial indicators are also used to measure the amount of material removed during grinding or milling.

3. Digital dial indicator

Digital dial indicators feature digital displays that offer much more feasible and faster reading than traditional dial indicators. They offer a precise and advanced digital reading experience with unique features like data output and tolerance settings. Digital dial indicators are more user-friendly and offer enhanced accuracy.

4. Test dial indicator

Test dial indicators have a highly sensitive mechanism and small measuring range that are designed to measure small linear deviations and runouts. This dial indicator type is suitable for projects requiring precise alignments or checking for concentricity.

5. Dial bore gauge

Dial bore gauges are specially designed to measure the internal diameters of bores or holes of a structure or boreholes. Dial bore gauges consist of a dial indicator mounted on a telescopic arm, allowing for precise readings within cylindrical openings of a structure or boreholes.

At Penn Tool Co., we offer an extensive range of dial indicators to help you discover the most suitable and affordable measuring tool for your business or personal projects. Explore our website to learn more about our products and find the best measuring tool at relatively lower prices.

What are the primary parts of the dial indicator?

A dial indicator consists of several parts, including:

• A dial face or bezel: To rotate with zero point to align with the needle and read the measurements.
• Needle: Used to offer precise readings based on the changes in position or measurements.
• Plunger: Used to transfer the point movement to the indicator.
• Others: Other parts such as markers, a contact point, spindle, bezel lock, and more.

What are the basic dial indicator reading terms?

Understanding the basic terms can help effectively use a dial indicator to get accurate and reliable readings and interpret small distances or variations in different applications. Common terms associated with dial indicators include dial face and reading, graduations, needle or pointer, zero position, resolution, tolerance, and range.

How to read a dial indicator to measure runout along a shaft?

You can easily measure runout along a shaft by setting the point on the shaft and slowly turning the shaft by hand to determine the highest or lowest points. Set the zero to the point and turn the shaft again to get the largest readings called the Total Indicator Runout (TIR). 

How to read a dial indicator to measure the height of a structure?

Begin by determining the required height of the workpiece or structure and using a gauge block to stack up to the required height. Mount your indicator to ensure that the indicator slides seamlessly on the surface plate or table. Set your indicator to zero and carefully slide the gauge block out to get precise and accurate readings. 

How to read a 0.001 dial indicator?

To read a 0.001 dial indicator, note the zero position where the needle aligns with the reference point. Each graduation on the dial face represents 0.001 units. Observe the needle's position to carefully interpret the smallest increments and identify the corresponding number on the dial face for accurate measurement. 

How to read a dial indicator in inches?

Always begin by locating the zero position where the needle aligns with the reference point. Each graduation on the dial face corresponds to a specific inch increment. Hence, you should carefully observe the needle's position and identify the corresponding number on the dial face for precise inch measurements. Pay utmost attention to the details to get accurate and correct readings.

Selecting the right dial indicator type can be challenging, especially if there are various options. At Penn Tools, we offer simply the best and most flexible measuring tools to help you get the most convenient and accurate results. Get in touch with us or browse our website to learn more about our products or services.