Analog dial gauge – SA021EZ/SA02140EZ

The analog dial gauge is an instrument used to detect linear displacement and perform comparative dimensional inspections in workshops, fixtures and quality control. It is widely used when the aim is not to read an absolute dimension, as with a caliper or micrometer, but to verify a displacement against a reference, a difference between two positions or a dimensional variation on a component.

The operating principle of the analog dial gauge is simple and effective: the contact point moves linearly when it touches the part, and this movement is transferred to the dial, where the pointer shows the detected variation. In practice, the instrument is not intended to “measure from zero” like a direct measuring instrument, but to check differences, form errors, runout, misalignment and very small dimensional variations.

The 0.01 mm reading places this instrument in the category of analog dial gauges, making it suitable for checks where variations of one hundredth of a millimetre must be detected. For this reason, it is widely used in comparative inspections, machine setup, flatness checks, parallelism, eccentricity, concentricity and runout inspection.

One of the advantages of the analog dial gauge is the immediate reading of variation through the dial. This makes inspection very intuitive, because the operator can directly observe the pointer movement and quickly interpret the measurement trend during the check. The easy-to-read dial further improves readability, making the reading clearer even during repetitive operations or continuous inspection.

From a construction point of view, the instrument is protected by transparent glass with rotating bezel, a useful solution to protect the dial and set the visual reference more conveniently during inspection. The rack spindle with interchangeable threaded tip makes the instrument more versatile, allowing the contact point to be adapted according to the type of check or component to be inspected.

The series is available with 0-5 mm or 0-10 mm travel, both with 0.01 mm reading. The dial diameter is available in 40 mm or 60 mm versions, allowing better adaptation to the type of installation and the required readability. The 8 mm stem diameter also makes this analog dial gauge compatible with the most common supports, magnetic bases and clamping devices used on measuring stations or machine tools.

From an operational point of view, the analog dial gauge is a very versatile instrument. It can be used alone inside inspection fixtures or combined with supports, columns, magnetic bases, bore gauges and special devices. This flexibility makes it a very common solution in mechanical applications, both for quality control and for the adjustment of machines and equipment.

For those looking for reliable analog dial gauges, this instrument represents a practical solution for daily dimensional displacement checks. It is particularly suitable when immediate readability, simple interpretation and a classic dial configuration are required for comparative inspections in workshops and metrology rooms.

Applications

• Comparative inspection of dimensions and deviations
• Flatness and parallelism checks
• Eccentricity and concentricity inspection
• Radial and axial runout measurement
• Adjustment and alignment in workshops
• Use with magnetic bases and supports
• Use on inspection fixtures and bore gauges

FAQ – Analog dial gauge

What is an analog dial gauge?
It is an instrument used to detect linear displacement and check dimensional deviations against a reference.

What is an analog dial gauge used for?
It is used to check dimensional differences, runout, eccentricity, concentricity, flatness, parallelism and other very small deviations.

How does an analog dial gauge work?
The contact point moves when it touches the part, and the movement is transferred to the dial, where the pointer shows the detected variation.

What does 0.01 mm reading mean on an analog dial gauge?
It means that the instrument has a 0.01 mm reading, allowing variations of one hundredth of a millimetre to be detected.

What is the difference between an analog dial gauge and a thousandth dial indicator?
The analog dial gauge reads variations of 0.01 mm, while a thousandth dial indicator is designed to detect even smaller variations.

How do you read an analog dial gauge?
The position of the pointer on the main dial is observed, and the displacement is interpreted against the zero reference set for the inspection.

Does this instrument measure an absolute dimension?
No, it is normally used for comparative measurements, therefore to check displacement against a known dimension or reference.

What is the rotating bezel used for?
The rotating bezel helps set the visual reference on the dial more conveniently during use.

What is the interchangeable threaded tip used for?
It is used to adapt the contact point to the type of inspection to be carried out, making the instrument more versatile according to the application.

Which travels are available?
Versions with 0-5 mm and 0-10 mm travel are available.

What dial diameter is available?
The dial is available in 40 mm or 60 mm versions.

What is the stem diameter?
The stem diameter is 8 mm.

Can the analog dial gauge be mounted on a magnetic base?
Yes, the 8 mm stem makes it suitable for the most common supports and magnetic bases normally used in workshops.

For which applications is it most commonly used?
It is frequently used in comparative dimensional inspections, machine adjustments, runout inspection and equipment alignment.

Who is this analog dial gauge suitable for?
It is suitable for mechanical workshops, fixtures, production departments and quality control areas that need to check dimensional deviations with a simple and immediate instrument.

What are the most common errors when using an analog dial gauge?
The most frequent errors are unstable mounting, incorrect zero setting, inconsistent contact on the part and reading interpreted without the correct reference.