Inside micrometer – SA111H

The inside micrometer is a measuring instrument designed for checking internal diameters, internal widths and dimensions in areas where a more traditional inside micrometer cannot operate as easily. It is especially useful when measurements must be performed in internal seats or recessed areas where the geometry of the component requires contacts better suited to the measuring point.

The main feature of this instrument is the presence of measuring jaws with carbide contacts, specifically designed to correctly reach the internal dimension to be inspected. In these applications, not only the hundredth-millimeter resolution matters, but also the shape of the contact surfaces, because this configuration allows access to internal points that would be more difficult to inspect with standard instruments.

This type of inside micrometer is commonly used for inspections on internal diameters, internal widths and internal dimensions where a bore gauge or another type of inside micrometer may not represent the most practical solution for the geometry of the component.

The instrument can also be used for ovality inspection, by taking measurements at different points of the same diameter and comparing the obtained values. In this way it is possible to identify dimensional variations along the inspected internal section.

From a construction point of view, the instrument is equipped with a friction thimble, locking system and carbide contacts. The friction thimble helps maintain more consistent contact during measurement, while the locking system allows the measured value to be held in position. The 0.01 mm resolution makes it suitable for hundredth-millimeter dimensional inspections in workshops and quality control environments.

The available range covers sizes from 5-30 mm up to 175-200 mm, allowing the instrument to adapt to different internal measurement requirements. In the 5-30 mm and 25-50 mm models, setting rings are included for instrument zero setting and adjustment procedures.

From an operational point of view, the inside micrometer is intended for users who need a dedicated instrument for internal measurements in difficult-to-access areas or on geometries where a standard inside measuring instrument would be less practical. It is particularly suitable for workshops, tool rooms and quality control departments performing internal dimensional inspections.

Applications

• Measurement of internal diameters
• Inspection of internal widths
• Verification of internal seats
• Internal diameter inspection at multiple points
• Dimensional inspections in workshops
• Use in tool rooms and quality control departments

FAQ – Inside micrometer

What is an inside micrometer?
It is a measuring instrument designed for checking internal dimensions using a jaw-style configuration, useful when the geometry of the component requires more suitable contact surfaces than standard inside measuring instruments.

What is an inside micrometer used for?
It is used for measuring internal diameters, ovality, internal widths and internal dimensions where other measuring instruments may be less practical.

Why choose an inside micrometer instead of a bore gauge?
Because in some applications the main issue is not only the internal measurement itself, but also the ability to correctly reach the measuring point. In these cases the jaw-style configuration may be more suitable.

What is the difference between this instrument and a standard inside micrometer?
The main difference is the geometry of the contact surfaces. This model is intended for specific internal measuring points where the shape of the component requires dedicated jaws for correct contact.

Can this micrometer also be used for ovality inspection?
Yes, it can also be used for ovality inspection by taking measurements at different internal points and comparing the obtained values.

What are the carbide contacts used for?
The carbide contacts provide better wear resistance on the measuring surfaces, especially during frequent use.

What is the purpose of the friction thimble?
The friction thimble helps maintain more regular contact during measurement, improving consistency in repetitive inspections.

What is the locking system used for?
It is used to hold the measured value in position so that it can be read or compared more conveniently.

What resolution does this inside micrometer have?
The resolution is 0.01 mm, making it suitable for hundredth-millimeter inspections.

What measuring ranges are available?
The available range covers sizes from 5-30 mm up to 175-200 mm.

Are setting rings included?
Yes, setting rings are included in the 5-30 mm and 25-50 mm models.

In which applications can this instrument be useful?
It can be useful in workshops, tool rooms and quality control departments whenever internal dimensions must be checked on seats or difficult internal areas.

Who is this micrometer intended for?
It is intended for users working on components with particular internal geometries and requiring an instrument better suited to the actual measuring point.

What are the most common mistakes during internal measurements with this instrument?
The most common mistakes are incorrect jaw positioning, dirty surfaces, selecting an unsuitable measuring range and poor contact management during inspection.