30-40mm Three-Point Internal Micrometer With Setting Ring And Extension, Case - Metav IndustryLine

Take advantage of the three‑point contact and 0.005 mm accuracy for dependable blind‑hole measurements; the included setting ring and extension make the instrument ready for immediate workshop use. Order or request advice directly via Metav Werkzeuge for supply and application support.

Three‑Point Inside Micrometer M312.137.P — 30–40 mm range, 0.005 mm accuracy (Metav IndustryLine)

Three‑point inside micrometer M312.137.P is a precision instrument for measuring internal diameters, especially designed for blind‑hole applications in fine mechanical and workshop environments

• Three‑point contact for blind‑hole measurement
• Measuring range 30–40 mm
• Accuracy 0.005 mm industrial grade
• Delivered in protective transport case

Precision where blind holes matter

The three‑point design provides a stable, repeatable contact geometry that centres itself inside blind holes, delivering reliable readings where standard anvil instruments struggle. With a measuring range of 30–40 mm and an accuracy of 0.005 mm, the instrument suits micro‑range tasks that demand fine tolerance control. The matt‑chrome scale and vernier reduce glare for easier reading and resist workshop wear, improving throughput by cutting rework and measurement uncertainty.

Built for workshop reliability and ease of use

Robust construction and an analog vernier format make the tool intuitive for technicians accustomed to mechanical gauges, while the included setting ring (Ø40) and extension (150 × Ø16.7) enable fast adaptation to different blind‑hole depths. Delivery in a protective transport case keeps the device safe during storage and transit. The weighing of components and compact design ensure ergonomic handling during repetitive checks, supporting consistent measurement practice on the shop floor.

Suitable applications and practical benefits

Engineered for internal diameters and blind‑hole bores, this measuring device is ideal for precision maintenance, jig and fixture checks, and assembly control in metalworking and toolmaking. The three contact points produce a centred measurement that reduces eccentricity errors; this is particularly valuable when assessing fit or clearance in tight assemblies. Accessories included with the instrument allow immediate deployment in production or inspection routines, shortening setup time and increasing operational efficiency.

Contact Metav Werkzeuge for tailored advice or to arrange supply of the Metav IndustryLine three‑point inside micrometer (M312.137.P) and receive guidance on application and accessories.

Technical data

• Article number: M312.137.P
• GTIN: 4054469158662
• Tariff number: 90173000
• Category: Messschrauben

Key figures

• Measuring range: 30–40 mm
• Maximum range: 40 mm
• Minimum range: 30 mm
• Accuracy: 0.005 mm
• Reading increment: 0.005 mm
• Length: 90 mm
• Weight: 2.5 kg

Special features

• Three‑point contact for blind‑hole measurement
• Analog vernier scale
• Scale and vernier matt‑chrome plated
• Includes setting ring (Ø40)
• Includes extension 150 × Ø16.7
• Delivered in protective transport case
• Suitable for measuring blind holes
• Category: Messschrauben (inside micrometers)

FAQ

How does the three‑point contact improve blind‑hole measurement?
The three‑point contact in the three‑point inside micrometer (M312.137.P) centres automatically in the bore, reducing eccentricity and providing more reproducible internal diameters than single‑point probes.

Which measuring range does this instrument cover?
This inside micrometer covers the 30–40 mm range and is supplied ready for use with the setting ring and extension included in the delivery.

Is the instrument ready for workshop use straight away?
Yes, the Metav IndustryLine three‑point inside micrometer M312.137.P is supplied with a setting ring and extension and arrives in a protective transport case for immediate deployment.

What reading accuracy can be expected in typical use?
The instrument offers a declared accuracy of 0.005 mm, suited to micro‑range precision tasks and repeatable dimensional checks in production environments.

Can the device be used for depth or step measurements?
The tool is optimised for internal diameter measurements and blind holes; specialised applications such as depth or step measurement are outside its primary design but may be approached using appropriate extensions and fixtures.

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