Depth threads measurement – SAFIL

The depth threads measurement instrument is a measuring tool designed to verify the usable depth of threaded holes in a practical and reliable way, especially when the threaded depth must be checked repeatedly in workshops, production departments or during inspection operations.

Unlike a generic depth measurement carried out with non-dedicated instruments, this tool is designed to work directly on the internal thread through a dedicated threaded tip. In this way, the inspection is performed more consistently with the real geometry of the hole, making it particularly useful when threaded seats must comply with a specific depth and pitch according to drawing requirements or machining cycles.

The structure is simple, robust and intended for everyday use. The reading is performed through a 1/20 vernier scale, with a resolution of 0.05 mm, making the instrument suitable for rapid and repeatable inspections without electronic components. The maximum inspection depth is 65 mm. This makes the instrument particularly suitable for production environments where a direct, reliable and immediately usable measuring solution is required.

The operating principle is practical: the threaded tip is selected according to the diameter and pitch of the thread to be inspected, then the instrument is used to verify the usable depth of the threaded hole. In this way, the inspection is not limited to the geometric depth of the hole, but specifically concerns the usable threaded section.

The maximum inspection depth is 65 mm, making the instrument suitable for a wide range of internal threaded hole applications, especially when a rapid and dedicated inspection of the usable thread depth is required.

This instrument is particularly suitable for inspections on blind threaded holes or components where thread depth is a functional dimension, because it allows moving from a generic evaluation to a dedicated and more accurate inspection. In mechanical machining this type of inspection is important, for example, when the correct engagement of a screw or male threaded component depends directly on the usable threaded depth.

The instrument is available in different versions according to the diameter and pitch of the thread to be inspected. The correct configuration must therefore be selected according to the specific customer application.

For machine shops, quality departments and production environments where threaded holes must be checked regularly, it represents a useful solution for making inspections faster, more consistent and easier to repeat between different operators.

Applications

• Inspection of threaded hole depth
• Verification of blind internal threads
• Dimensional inspection on threaded seats
• Use in workshops, production and quality control
• Verification of usable thread depth according to diameter and pitch

FAQ – Depth threads measurement

What is a depth threads measurement instrument used for?
It is used to verify the usable depth of a threaded hole, meaning the actual available threaded section inside the component.

When should a dedicated instrument be used instead of a normal depth gauge?
When the inspection must be carried out directly on the thread itself and not only on the geometric depth of the hole.

Why is it useful for blind threaded holes?
Because in blind holes it is important to know where the thread is actually usable, especially when screw engagement depends on the available threaded depth.

What is the advantage compared to a non-specific depth measurement?
It allows the dimension to be checked more consistently with the actual thread geometry instead of performing only a generic depth measurement of the hole.

How is the correct version of the instrument selected?
It is selected according to the diameter and pitch of the thread to be inspected, which must be specified when requesting the instrument.

Is this instrument universal for all threads?
No, it is available in different versions dedicated to different thread types in order to work correctly with the required thread profile.

What type of reading does the instrument have?
It features a mechanical 1/20 vernier reading with a resolution of 0.05 mm.

Why can it be useful in quality control?
Because it helps standardize threaded depth inspections and reduces approximate evaluations between different operators.

In which industrial environments is it most commonly used?
It is commonly used in machine shops, quality control departments and production environments whenever thread depth is a functional dimension of the component.

Can it also be useful in production and not only during final inspection?
Yes, especially when rapid inspections must be carried out directly during the machining process.

Why choose a dedicated instrument for thread depth inspection?
Because it allows a specific dimension to be checked in a more direct, consistent and application-oriented way compared to generic measuring instruments.