The magnetic base for the dial indicator is an essential accessory of the dial indicator. Its stability directly affects the
measurement accuracy. This article will deeply explore the working principle of the magnetic base for the dial indicator
and how to achieve stable fixation, thereby ensuring the accuracy and reliability of the measurement results.
I. Working Principle of the Magnetic Base for the Micrometer
1. Magnets have north and south poles. Like poles repel each other, while opposite poles attract each other. The core
component of the magnetic base for the dial indicator is a permanent magnet, which can generate a powerful
magnetic force.
2. This permanent magnet is usually enclosed within a metal casing. At the bottom of the casing, there is a switch
device which is used to control the strength of the magnetic force, or to control whether the magnetic force acts
on the adsorption surface.
3. When we turn on the switch, the magnetic force will pass through the metal casing and firmly adhere to the surface
of ferromagnetic materials, such as steel parts, etc. This ensures the stable fixation of the dial indicator.
II. How to achieve stable fixation?
1. Select the appropriate adsorption surface: The adsorption force of the magnetic base plate is closely related to
the material of the adsorption surface, the surface smoothness, and the size of the contact area. Choose a flat, smooth,
and large-area ferromagnetic material as the adsorption surface.
2. Clean the adsorption surface: The oil stains, iron filings, and other impurities on the adsorption surface can affect
the strength of the magnetic force. Therefore, before use, it is essential to clean the adsorption surface
to ensure it is clean and dry.
3. Correct operation of the switch: Before use, make sure the switch is in the open position to ensure that the magnetic
force functions fully. After use, close the switch to prevent the magnetic base from attracting other ferromagnetic
substances, which could affect its service life.
4. Adjusting the angle of the table base: Some magnetic table bases have a universal adjustment function,
allowing you to adjust the angle of the table base as needed to accommodate different shapes of workpieces.
After adjusting the angle, make sure the locking device is securely fastened to prevent the table base from moving
during the measurement process.
III. Different Types of Magnetic Stand
1. Basic Magnetic stand: This is the most common type. It has a simple structure and is easy to operate,
suitable for general measurement scenarios.
2. Fine adjustment magnetic base: This table base is equipped with a fine-tuning mechanism, allowing for precise
adjustments to the position of the micrometer, thereby enhancing measurement accuracy.
3. Powerful-lock Magnetic Base: This base is equipped with a powerful magnet, offering greater adhesion force.
It is suitable for measuring heavy workpieces.
IV. Maintenance and Care of Magnetic Base Plates
1. Avoid Collisions: The permanent magnets inside the magnetic base plate are quite fragile. To prevent damage
to the magnets and loss of their magnetic attraction, collisions should be avoided.
2. Maintain cleanliness: Regularly clean the magnetic base to prevent iron filings, oil stains, and other impurities
from adhering to the surface of the magnet, which could affect its performance.
3. Stay away from high temperatures: High temperatures can affect the magnetic properties of the permanent magnet.
Therefore, it is necessary to avoid leaving the magnetic base for a long time in a high-temperature environment.
V. Tips for Selecting Magnetic Stand
1. Choose the appropriate type based on measurement requirements: For example, if high-precision measurement
is needed, a micro-adjustable magnetic table socket can be selected; if measuring heavy workpieces is required,
a strong magnetic table socket can be chosen.
2. Pay attention to the strength of the magnetic force: The strength of the magnetic force determines the adhesion
force of the table base. You should select an appropriate magnetic force based on the weight and shape
of the workpiece to be measured.
