25-30 mm Three-Point Internal Measuring Gauge With Carbide Measuring Faces, Setting Ring, DIN 863 - Metav IndustryLine

Take advantage of the combination of 0.005 mm measurement accuracy, carbide measuring faces and a compact 25–30 mm measuring range for reproducible internal inspections; order the M312.136 directly via Metav Werkzeuge or consult our specialists for application advice

Three-point internal micrometer M312.136 — 25–30 mm range, carbide measuring faces (Metav IndustryLine)

The Three-point internal micrometer M312.136 is an analogue internal measuring instrument designed for precise bore and blind-hole inspection in workshop and production environments

• Three-point internal measuring geometry
• Carbide measuring faces (HM) for long wear life
• High accuracy: 0.005 mm
• Delivered in a protective transport case

Precision where repeatability saves time

The three-point measuring system provides a stable contact around the bore, ensuring concentric support and a consistent measurement axis; this geometry reduces the influence of lateral play and gives reproducible internal diameters on cylindrical bores. With a declared 0.005 mm accuracy the instrument suits fine checking tasks in toolrooms and quality control stations where small deviations matter. The analogue vernier is matt chrome-plated for readable contrast and long-term legibility, while the carbide measuring faces resist wear and preserve measurement integrity over many cycles.

Built for blind-hole and confined-space inspection

The compact 25–30 mm measuring span and the included setting ring make the gauge particularly useful for blind-hole measurements, where standard internal callipers are difficult to position. The instrument’s design concentrates contact forces at three equidistant points, which simplifies centring in short or stepped bores and reduces measurement scatter. As an analogue tool conforming to DIN 863, it allows quick checks without reliance on batteries or electronics, improving uptime and simplifying traceable routine inspections.

Workshop-ready durability and practical handling

Materials and finish are chosen for everyday industrial use: the scale and vernier are matt chrome-plated for corrosion resistance and clear reading, and the carbide faces provide wear resistance on repeated contact with steel or cast surfaces. Supplied in a protective transport case, the gauge is easy to store and move between machines or inspection benches. For assembly, jig and fixture inspection or maintenance rounds the instrument shortens decision time by delivering fast, reliable measurements that integrate well into existing quality workflows.

Contact Metav Werkzeuge today for tailored application advice and to secure the Metav IndustryLine Three-point internal micrometer M312.136 with carbide measuring faces and 0.005 mm accuracy

Technical data

• Article number: M312.136
• GTIN: 4054469119496
• ECLASS: 21170335
• ETIM: EC003590
• Tariff number: 90173000
• Standard: DIN 863

Facts

• Measuring range: 25–30 mm
• Accuracy: 0.005 mm
• Type: Analogue, vernier scale
• Setting ring: 25
• Length: 90 mm

Special features

• Carbide measuring faces (HM)
• Suitable for blind-hole measurements
• Delivered in a protective transport case
• Scale and vernier matt chrome-plated
• Extensions: 150xØ16
• Analogue three-point internal measuring geometry

FAQ

How does the three-point measuring principle improve internal measurements?
The three equidistant contact points centre the gauge in the bore and reduce lateral play, so the M312.136 achieves more consistent readings than two-point designs for short and stepped bores.

Is the instrument suitable for blind-hole inspection?
Yes, the tool is specifically prepared for blind-hole measurements; the geometry and compact measuring range facilitate reliable checks in restricted-depth bores.

What accuracy can be expected in routine use?
The instrument is specified with an accuracy of 0.005 mm; stable handling, correct seating and the carbide faces help maintain this level of performance in workshop conditions.

Does the gauge comply with recognised standards?
The analogue instrument is produced in accordance with DIN 863, providing a familiar standard basis for workshop verification and documentation.

Are replacement or extension accessories available?
Extensions listed for the item include 150xØ16; consult Metav for compatible extensions and handling accessories to suit specific fixtures.

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