Ensure precise bore diameter inspection for ballistic and industrial applications
Specialised internal fine-measurement systems are designed to capture bore diameters from 10.4 mm up to 155 mm with process-safe reproducibility, enabling reliable assessment of straightness, roundness and cylindricity for both small-arms and large-calibre barrels. These modular systems combine extendable measurement rods and stiff guiding units to reach measurement depths up to 6000 mm, supporting full-length drift and rifling profile checks and field and groove measurements. By integrating high-resolution sensor technology with mechanically rigid guidance, the solution delivers precision measurement, reproducible quality assurance and comprehensive depth capability in demanding metalworking and inspection environments.
Reliable bore diameter inspection for extreme length-to-diameter ratios
Bore diameter measurement describes the quality-assured inspection of internal bores using specialised internal fine measuring devices and multipoint measuring mandrels. These systems cover a very wide size spectrum, from approximately 10.4 mm up to 155 mm, and are designed for process-safe capture of bores across small firearms barrels up to large-calibre gun tubes.
How the system works and where it is essential
The inspection architecture is modular: interchangeable calibres and extendable measuring rods allow a single measurement system to handle multiple bore sizes. High-resolution sensor arrays, combined with a mechanically torsionally stiff guiding assembly, enable reproducible readings even when the length-to-diameter ratio is extreme. Typical applications include rifling and twist-profile analysis, lands-and-groove measurements and full-length straightness checks in production, overhaul and ballistic testing environments.
Tangible production benefits that matter
- Modular calibre coverage reduces the need for multiple specialised gauges and lowers changeover time.
- Measurement range 10.4–155 mm supports work from small pistol barrels to large gun tubes.
- Measurement depth up to 6000 mm permits continuous inspection of the entire bore, including rifling zones.
- Detection of geometric deviations such as straightness, roundness and cylindricity (conicity) ensures compliance with ballistic and safety requirements.
- Mechanically robust guidance plus high-resolution sensors deliver reproducible results, reducing rework and supporting traceable quality assurance.
Why partner with Metav for bore diameter tasks
Metav acts as an experienced precision partner that democratises high-accuracy measurement for the workshop. Based in Emmerich, Metav combines decades of expertise with a comprehensive product range and a proven logistics and quality filter for the European market. With over 48,000 customers and more than 250,000 products, Metav offers a one-stop source for measurement systems, accessories and modular supplies that keep inspection programmes reliable and simple to manage.
The core message in one line
Bore diameter inspection systems provide modular, deep-reaching and highly reproducible measurement for demanding internal-bores, ensuring component integrity and compliance across the full size range.
FAQ
What measurement range does a bore diameter system cover?
A bore diameter system typically supports the modular calibre coverage described above, spanning roughly 10.4 mm to 155 mm, which allows inspection of both small arms barrels and large-calibre tubes with a single system architecture.
How deep can inspections be performed with these systems?
Inspections can reach depths of up to 6000 mm thanks to extendable measuring rods and high-stability guidance units, enabling continuous measurement along the entire bore length.
Which geometric deviations can be detected reliably?
These systems are designed to detect minute deviations in straightness, roundness and cylindricity (conicity), meeting the strict demands of ballistic performance and safety standards.
Is one modular system sufficient for multiple bore sizes?
Yes. The modular design and interchangeable calibre modules mean a single bore diameter system can be adapted for a wide range of internal diameters, reducing equipment redundancy while maintaining process safety.
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