The dial indicator is a commonly used precision instrument in industrial measurement. However, it may occasionally
get stuck, which affects the measurement process. This article will explain in a professional manner the reasons for
the dial indicator getting stuck and the corresponding repair methods in detail. It will help you quickly restore the normal
function of the dial indicator and provide some suggestions for daily maintenance to extend its service life.
I. Understanding the causes of the dial indicator getting stuck
1. Before repairing the dial indicator, we need to understand why it gets stuck. Common causes of sticking include:
dust or dirt entering the indicator; insufficient or aged lubricating oil; wear or deformation of parts; impact
or vibration;improper operation, etc.
2. There are many reasons for the jamming of the dial indicator. We need to carefully observe and analyze to identify
the real cause and carry out targeted repairs. For instance, if it is due to dust entering the instrument, cleaning
is required; if it is because of insufficient lubricating oil, adding lubricating oil is necessary; if it is due to damaged
parts, replacing the parts is needed.
3. Different types of dial indicators have slightly different internal structures and working principles, so the causes
of jamming may also vary. For instance, digital dial indicators and mechanical dial indicators have significant
structural differences, and their maintenance methods may also be different.
II. Common Maintenance Methods for Stuck Dial Indicator
1. Cleaning the dial indicator: Use a clean soft cloth or professional cleaning tools to remove dust and dirt from
the surface of the micrometer. For internal cleaning, use professional cleaning agents and air blowers for the process.
Be careful not to damage the internal parts.
2. Adding lubricating oil: If the lubricating oil is insufficient or has deteriorated, it is necessary to add or replace it
with new oil. Choosing the right lubricating oil is crucial. Generally, it is recommended to use professional watch oil,
which has a lower viscosity and can effectively reduce friction.
3. Inspection and Replacement of Parts: If any parts are found to be worn or deformed, they must be replaced promptly.
For instance, components such as measuring rods and gears are prone to wear and thus require regular inspection
and replacement.
III. Daily Maintenance of the Dial Indicator
1. Regular Cleaning: Regularly cleaning the dial indicator can effectively prevent dust and dirt from entering the device,
reducing the likelihood of jamming. It is recommended to clean it once a week, or adjust the frequency based on
the usage frequency.
2. Correct Usage: When using a dial indicator, handle it with care and avoid any collisions or vibrations.
When measuring, apply appropriate force but do not exert excessive pressure to prevent damage to the measuring rod
or other components.
3. Storage environment: Store the dial indicator in a dry, ventilated, and dust-free place to effectively extend its
service life. Avoid storing it in a humid or hot environment.
IV. Special Maintenance Techniques for Different Types of Micrometers
1. Mechanical Dial Indicator: For mechanical micrometers, the outer casing can be disassembled.
Carefully inspect the internal components, such as gears and springs, and perform cleaning and lubrication.
2. Digital Dial Indicator: The internal structure of the digital micrometer is quite complex. In case of any malfunction,
it is recommended to contact professional maintenance personnel for repair to prevent further damage caused
by unauthorized disassembly.
3. Dial-mounted Dial Indicator: If there is any problem with the dial, such as looseness or deformation, it should be
repaired or replaced promptly to ensure the stability of the measurement.
V. How to Determine Whether a Micrometer Requires Professional Repair
1. If the dial indicator still fails to function properly after simple cleaning and lubrication, it is necessary to consider
sending it to a professional repair facility for inspection and repair.
2. If the dial indicator shows severe deformation or damage, such as a bent measuring rod or a cracked dial,
it must be sent to a professional repair facility for repair.
3. Do not attempt to disassemble and repair the complex internal structure of the micrometer by yourself
unless absolutely necessary, as doing so may cause even greater damage.
Here are some questions you might be interested in and their answers:
Q: What should I do if the measuring rod of the dial indicator is bent?
A: If the measuring rod is bent, it will affect the measurement accuracy. Therefore, a new measuring rod
needs to be replaced.
Q: How to deal with unstable readings on a dial indicator?
A: The unstable readings could be caused by worn parts, insufficient lubricating oil, or other factors.
Therefore, it is necessary to conduct an inspection and carry out repairs.
Q: How to choose the appropriate lubricant for the dial indicator?
A: It is recommended to use professional watch oil, which has a lower viscosity and can effectively reduce friction.
The dial indicator is a precise measuring tool and requires our careful care. By learning the maintenance methods
and daily maintenance skills, I believe everyone can easily solve the problem of the micrometer getting stuck
and extend its service life, ensuring the smooth progress of the measurement work.
