Support Instructions Measuring Dial Indicator

Dial Indicator

The dial indicator is an essential tool in precision measurement, especially in machining and quality assurance, where it helps ensure the dimensional accuracy of components and parts. Different types of dial indicators and accessories can meet a wide range of measurement needs.

Types of Dial Indicators

Mechanical Dial Indicator:

  • Uses a mechanical moving needle and gear system to convert linear motion into rotational motion visible on a dial.
  • Equipped with an analog display that shows the measured value.
  • High accuracy and reliability, does not require batteries.

Digital Dial Indicator:

  • Utilizes electronic components and a display for reading measurement results.
  • Can be equipped with additional features like data output and memory.
  • Convenient, easy-to-read display but requires a battery.
  • Wireless data transmission and separate display allow measurement in hard-to-reach places

Lever Dial Indicator:

  • The measuring arm moves laterally in relation to the dial of the indicator.

  • Particularly suitable for measuring in tight spaces and precise measurement of different parts of a component.

Structure of a Dial Indicator

A dial indicator consists of several components:

  • Dial: Displays the measurement result with markings and pointers (mechanical) or a digital display.
  • Needle: In a mechanical dial indicator, it indicates the measured value on the dial.
  • Measuring Arm: Contacts the measured surface and transfers its movement to the measurement mechanism. Exchangeable measuring tips: Ball, cone, flat, etc., allow for various measurements to be performed.
  • Attachment of the body and base: Enables the dial indicator to be attached to different measurement stations.
  • Zeroing Mechanism: Allows the indicator to be zeroed before starting measurement.

Magnetic Base for Dial Indicator Attachment

Dial indicators are typically attached to the magnetic base of the indicator:

  • Magnetic Base: Easy and quick to attach to the measurement platform.
  • Attachment Mechanisms: Magnetic bases usually contain either a mechanical or hydraulic measuring arm, allowing the indicator to be set to the desired position.
  • Enables stability and accuracy in measurements.

Applications

Dial indicators are used in various applications:

  • Calibration of Measurements: Accurate measurement and equipment calibration require a dial indicator to achieve precise values.
  • Geometric Tolerances: Checking geometric tolerances, such as straightness, flatness, and parallelism.
  • Inspection of Parts: A tool for checking parts in the manufacturing process ensures dimensions meet designers' specifications.
  • Rotational Measurement: Determining total runout and other rotational-related measurements.

Accuracy and Measuring Range of the Dial Indicator

  • Accuracy: Typically, the accuracy of a dial indicator is 0.01 mm, but there are "precision dial indicators" on the market that allow for accuracy of 0.001 mm.
  • Stroke of the Measuring Arm: The "stroke" of the measuring arm's movement varies by model from a few millimeters to several tens of millimeters.

Usage of the Dial Indicator

Choosing a Dial Indicator:

  • Select a dial indicator whose measuring range and accuracy match your measurement needs.
  • Ensure the indicator is calibrated and in good condition.

Installation:

  • Securely mount the dial indicator on the measurement base and attach the magnetic base if needed.
  • Adjust the measuring arm to contact the measurement object.

Calibration and Zeroing:

  • Before starting measurement, perform calibration and properly zero the indicator.
  • Ensure the indicator does not move or vibrate during measurement.

Measurement:

Read the measured value from the dial indicator. For a mechanical dial indicator, read the value from the needle, and for a digital dial indicator, the reading is directly on the display.
If using the dial indicator for continuous measurement, ensure that the arm follows the measured surface evenly.

Maintenance and Calibration

To ensure the accuracy and longevity of the dial indicator, it requires regular maintenance and calibration:

  • Cleaning: Keep the indicator clean and free from dust and other impurities.
  • Lubrication: Mechanical parts should be lubricated according to designed usage intervals.
  • Protection: Store the indicator in a protective case when not in use.
    Calibration: Regular calibration with reference instruments ensures accuracy is maintained.

Summary

The dial indicator is a versatile and precise measuring device widely used in technical measurement and quality assurance. Different types of indicators, such as mechanical, digital, and lever indicators, can be chosen for various needs. With interchangeable tips, a magnetic base, and modern data transmission, dial indicators offer a flexible and accurate solution for various measurement needs. Regular maintenance and calibration are essential for ensuring operational accuracy and reliability. The dial indicator enables accurate and repeatable measurement results, which are crucial in manufacturing high-quality products and components.