L-shaped dial bore gauge – SA7102/3L

The L-shaped dial bore gauge is a measuring instrument designed for checking internal diameters when the measuring point is positioned orthogonally to the axis of the instrument. This configuration makes it particularly useful for inspecting bores, internal diameters and bearing seats when frontal access is not convenient or when the geometry of the component requires a lateral reading position.

The distinctive feature of the L-shaped stem lies in its geometry. Compared to a traditional straight dial bore gauge, this solution allows easier operation in situations where the dial gauge and the operator’s grip must remain outside the area of obstruction around the part, while the measuring point is positioned laterally or in a less accessible area in line with the axis. It is therefore especially suitable for components with shoulders, machine frames, housings and bearing seats where lateral internal measurements are easier to perform.

The operating principle remains the same as that of a comparative dial bore gauge. The instrument is first zeroed against a known reference, then inserted into the bore and oscillated until the reversal point of the dial gauge is found. At that point the deviation from the preset reference value is read. This method not only allows diameter verification, but also provides a clearer evaluation of the actual geometry of the bore during inspection.

The series is supplied without dial gauge, allowing the configuration to be adapted to the required inspection type. Depending on the application, it can be fitted with dial gauges or digital indicators, in 0.01 mm or 0.001 mm resolution, selecting the most suitable solution according to the required level of detail and the instrumentation already available in the workshop.

From a construction standpoint, the L-shaped dial bore gauge is available with either hardened steel contacts or carbide contacts. The steel-contact version is suitable for general technical use, while the carbide-contact version is particularly advantageous where higher wear resistance is required during repetitive inspections.

The available range covers measuring spans of 30-100 mm and 50-160 mm. This configuration makes the instrument suitable for inspections on relatively large internal diameters where lateral access offers a real operational advantage. In these applications, the L-shaped stem is not simply a different construction style, but a practical solution that improves accessibility during measurement.

For setting, inspection and calibration operations, the gauge block packers are particularly useful. They allow stable combinations of gauge blocks to be assembled in order to create reliable dimensional references, especially when checking dial bore gauges over different measuring ranges before use on the component.

From an application standpoint, this L-shaped dial bore gauge is intended for machine shops, toolrooms and quality control departments requiring an instrument suitable for lateral internal measurements, especially on housings and seats where axial access is less practical. It is a highly versatile technical solution for users looking for configuration flexibility, ease of operation and more convenient inspection on complex internal geometries.

Applications

• Measurement of internal diameters in positions orthogonal to the instrument axis
• Inspection of bores and housings with lateral access
• Verification of bearing seats
• Internal measurements on components with frontal obstructions
• Workshop, toolroom and quality control inspections

FAQ – L-shaped dial bore gauge

What is an L-shaped dial bore gauge?
It is a comparative measuring instrument designed for checking internal diameters when the measuring point is positioned orthogonally to the axis of the instrument.

What is an L-shaped dial bore gauge used for?
It is used for inspecting internal diameters on bores, housings and bearing seats when a traditional straight configuration is less convenient.

What is the advantage of the L-shaped stem?
The L-shaped stem facilitates inspection in lateral or orthogonal positions, keeping the grip and dial gauge outside the obstruction area of the component and making measurements easier to perform.

When should an L-shaped dial bore gauge be preferred over a straight model?
It is recommended when the measuring point is difficult to access in line with the axis or when the geometry of the component makes lateral inspection more practical.

Is this instrument suitable for checking bearing seats?
Yes, it is particularly suitable for inspecting bearing seats thanks to the configuration that simplifies measurements on lateral internal points.

Why is the instrument supplied without a dial gauge?
Because it can then be configured according to the specific application by selecting the most suitable indicator for the required inspection level.

Which dial gauges can be fitted?
Analog or digital indicators can be fitted, in either 0.01 mm or 0.001 mm resolution, depending on the required level of accuracy.

Is it available with both steel and carbide contacts?
Yes, the series is available in both versions in order to better suit the application type and inspection frequency.

What is the difference between steel contacts and carbide contacts?
Steel contacts are suitable for general-purpose use, while carbide contacts are particularly advantageous where increased wear resistance is required.

Which measuring ranges are available?
The series is available in the ranges 30-100 mm and 50-160 mm.

How is an L-shaped dial bore gauge correctly set and checked?
The instrument must be set against a known dimensional reference before use in order to correctly read deviations during bore inspection.

What are gauge block packers used for in this application?
They help create reliable dimensional references using gauge blocks and are particularly useful for setting, checking and calibrating dial bore gauges before measurement.

Who is this L-shaped dial bore gauge intended for?
It is intended for machine shops, toolrooms and quality control departments performing internal measurements on geometries where axial access is less favourable.