The hub micrometer is a measuring instrument designed for external measurements in areas where a standard micrometer is impractical or impossible to use. It is intended for components with restricted sections, discontinuous geometries and difficult access areas, in all applications where the challenge is not only reading the value but also correctly reaching the measuring point.
The configuration of this instrument is exactly what makes it useful. The measuring area is designed to work on restricted and irregular sections, allowing access to points that would be more difficult to inspect using a standard micrometer. For this reason it is commonly used in mechanical applications where the geometry of the component limits accessibility and requires an instrument better suited to the real shape of the part.
From a construction point of view, the micrometer features a hardened and ground micrometer screw together with a steel frame. The 0.01 mm resolution makes it suitable for hundredth-millimeter inspections typically required in workshop dimensional checks, with the added advantage of a structure specifically developed for hard-to-reach areas rather than for generic external measurements.
This micrometer is available in the 0-25 mm measuring range, making it suitable for localized dimensional inspections where accessibility is more critical than measuring range. It is particularly useful when inspecting shoulders, recesses, restricted passages and non-linear external geometries.
The purpose of this instrument is to perform inspections where the geometry of the component requires a micrometer different from a standard outside model. In this sense it is especially suitable for mechanical workshops, tool rooms and quality control departments that need to measure external dimensions in awkward or geometrically irregular areas.
Applications
- Measurement on restricted sections
- Inspection of external dimensions in hard-to-reach areas
- Dimensional inspections on irregular surfaces
- Workshop inspections on components with complex geometries
- Use in tool rooms and quality control departments
- Measurements in areas where a standard micrometer is less practical
- Applications requiring a more compact measuring area
FAQ – Hub micrometer
What is a hub micrometer?
It is a measuring instrument designed for checking external dimensions on components with restricted spaces or difficult geometries, where a traditional outside micrometer may be inconvenient to use.
What is a hub micrometer used for?
It is used for measuring external dimensions in restricted, recessed or difficult-to-access areas while maintaining hundredth-millimeter resolution.
Why use this instrument instead of a standard micrometer?
Because its configuration is better suited for working in areas where the size and geometry of a traditional outside micrometer would limit access to the measuring point.
What does irregular or restricted section mean?
It refers to situations where the geometry of the component is not uniform or continuous and where the inspection must be performed in areas that are more difficult to reach with standard instruments.
Is this micrometer suitable for hard-to-access points?
Yes, this is one of the main applications for which the instrument is particularly useful thanks to its compact measuring area.
What resolution does this micrometer have?
The resolution is 0.01 mm, making it suitable for hundredth-millimeter inspections.
What measuring range is available?
This instrument is available in the 0-25 mm measuring range.
What is the purpose of the hardened and ground micrometer screw?
It is an important component because it contributes to smoother movement and better measurement quality during inspection.
In which applications can this micrometer be useful?
It can be useful in workshops, tool rooms and quality control departments when measuring external dimensions on components with complex geometries, recesses or difficult access points.
What is the difference between this instrument and a normal outside micrometer?
The main difference is the shape and intended application. This model is designed for difficult-to-access points, while a standard outside micrometer is more suitable for regular external dimensions on easily accessible surfaces.
What are the most common mistakes in this type of inspection?
The most common mistakes are incorrect positioning of the instrument, dirty surfaces, poor contact management and choosing an unsuitable instrument for the actual geometry of the component.
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| Code | Range (mm) | Accuracy (mm) | Resolution (mm) |
| SA121-25 | 0-25 | 0,004 | 0,01 |
