3–6 mm Internal Bore Gauge Set 0.001 mm Resolution, Includes Setting Rings And Extension, In Case - Metav IndustryLine

Reliable internal measurement for small diameters is achieved with a fine 0.001 mm graduation and a typical accuracy of ±0.004 mm; the compact design, hardened measuring faces and supplied setting rings ensure consistent results in workshop and production inspections — order the set directly via Metav Werkzeuge or consult our advisors for specification checks.

M312.173 Internal Measuring Set — 3–6 mm, 0.001 mm resolution (Metav IndustryLine)

M312.173 is a compact internal measuring set for precise inspection of small bores and blind holes in production and workshop environments

• 0.001 mm graduation for fine resolution
• Accuracy ±0.004 mm for reliable results
• Includes setting rings and extension
• Delivered in protective transport case

Precision where repeatability matters

The M312.173 internal measuring set provides metrology-grade resolution of 0.001 mm combined with a practical industrial accuracy of ±0.004 mm, making it suitable for tight tolerances in small-bore work. The instrument uses an analog vernier on a matt-chromed scale, which offers tactile, dependable readings without dependency on electronics; this is an advantage in harsh workshop conditions and simplifies long-term serviceability. The set’s compact measuring span concentrates stiffness where it is needed, improving repeatability during routine quality checks.

Designed for blind-hole inspection and constrained bores

Engineered specifically for internal diameters and blind-hole applications, the set includes setting rings (4 mm, 5 mm, 6 mm) and an extension to adapt to varying depths. These accessories enable quick on-bench calibration and transfer of reference values, supporting efficient quality control workflows. The geometry of the measuring anvils and the narrow range of the instruments reduce the risk of tilt in small bores, which means fewer re-measurements and a faster inspection loop in serial production.

Robust construction for everyday workshop use

The instruments feature hardened measuring faces and an analog mechanical design that resists shock and contamination compared with delicate electronic alternatives. The transport case supplied protects the set during storage and transit; its form factor is practical for workshop tool trolleys and the bench. The matt-chromed scale and vernier resist glare and are easy to read under typical workshop lighting, helping operators maintain consistent measuring technique and minimising reading error.

Practical set-up and integration into inspection routines

As a three-piece set, this equipment covers the common small-bore range while keeping inventory compact and manageable. The included extension and setting rings allow calibration against a traceable master before measurement, reducing setup time at the machine or inspection bench. Backed by the Metav IndustryLine range, the set fits into broader workshop provisioning strategies that prioritise robust tools and short delivery turnarounds, helping to streamline procurement and spare-part planning.

Contact Metav Werkzeuge to request a technical specification check, a tailored quotation or further detail from our Emmerich team by email or phone

Technical data

• Article number: M312.173
• GTIN: 4054469119809
• Category: Messgeräte / Messschrauben
• Manufacturer: Metav IndustryLine

Facts

• Measuring range: 3–6 mm
• Resolution: 0.001 mm
• Accuracy: ±0.004 mm
• Pieces per set: 3
• Weight: 1.3 kg

Special features

• Analog reading with matt-chromed scale and vernier
• Hardened measuring faces
• Suitable for blind-hole measurements
• Includes setting rings (4, 5, 6 mm) and extension
• Supplied in transport case

FAQ

How precise is the M312.173 internal measuring set?
The M312.173 delivers a reading resolution of 0.001 mm with an operational accuracy around ±0.004 mm, suitable for fine internal diameter control in production environments.

Can this set be used for blind-hole measurements?
Yes, the set is explicitly suitable for blind-hole measurement and includes setting rings and an extension to facilitate accurate checks at depth.

Are the measuring surfaces durable?
The measuring faces are hardened to provide wear resistance and repeatable contact, while the matt-chromed scale improves legibility and corrosion resistance.

What type of reading does the set use and how is it interpreted?
The instruments use an analog vernier on a matt-chromed scale with 0.001 mm graduation; interpretation follows standard vernier-reading technique for fine resolution.

What is included in the delivery of the set?
Delivery comprises three measuring instruments, setting rings (4 mm, 5 mm, 6 mm), an extension and a protective transport case

Manufacturer / Responsible: Metav Werkzeuge GmbH; Parkring 45; 46446 Emmerich; Germany; +49 2822 7131930; info@metav-werkzeuge.com