Dial Indicators

Dial indicators are precision measuring tools used to determine the amount of linear or angular displacement. They are typically made of a hardened steel frame with a dial face that is graduated in either inches or millimeters. The indicator is attached to the workpiece by a magnetic base or a clamping screw, and the plunger is then moved against the workpiece until it contacts the desired surface. The amount of deflection of the plunger is then read on the dial face.

Dial indicators are available in a variety of sizes and styles, with different ranges of measurement and accuracy. They are used in a wide range of applications, including machine shop work, precision assembly, and quality control.

Types of Dial Indicators

There are two main types of dial indicators:

• Linear dial indicators: These indicators measure linear displacement, such as the amount of taper in a shaft or the clearance between two parts.
• Angular dial indicators: These indicators measure angular displacement, such as the amount of bend in a shaft or the angle between two parts.

Features of Dial Indicators

Dial indicators typically have the following features:

• A hardened steel frame that is resistant to wear and tear.
• A dial face that is graduated in either inches or millimeters.
• A plunger that is made of a hard material, such as hardened steel or carbide.
• A magnetic base or a clamping screw for attaching the indicator to the workpiece.
• A locking mechanism to prevent the indicator from moving during measurement.

How to Use a Dial Indicator

To use a dial indicator, follow these steps:

1. Attach the indicator to the workpiece.
2. Move the plunger against the desired surface until it contacts the surface.
3. Read the amount of deflection on the dial face.

Advantages of Dial Indicators

Dial indicators offer a number of advantages over other types of measuring tools, including:

• High accuracy: Dial indicators can measure displacements with an accuracy of up to 0.0001 inch or 0.001 millimeter.
• Portability: Dial indicators are small and lightweight, making them easy to transport.
• Versatility: Dial indicators can be used to measure a variety of linear and angular displacements.

Applications of Dial Indicators

Dial indicators are used in a wide range of applications, including:

• Machine shop work: Dial indicators are used to measure the dimensions of parts, such as the taper of a shaft or the clearance between two parts.
• Precision assembly: Dial indicators are used to ensure that parts are assembled correctly.
• Quality control: Dial indicators are used to check the quality of products, such as the dimensions of a manufactured part or the alignment of a machined surface.

Conclusion

Dial indicators are precision measuring tools that are used to determine the amount of linear or angular displacement. They are available in a variety of sizes and styles, with different ranges of measurement and accuracy. Dial indicators are used in a wide range of applications, including machine shop work, precision assembly, and quality control.