250–275mm Three-Point Internal Gauge For Blind Holes With Carbide Measuring Faces, 140mm Depth, Analog 0.009mm Accuracy, Supplied In Case - Metav IndustryLine

For secure, repeatable interior measurement choose the evident combination of three‑point contact, carbide measuring faces and a ratchet stop for consistent measuring force; order the instrument directly via Metav Werkzeuge or contact our consultants for advice.

M312.152.S — Three‑point internal micrometer, 250–275 mm, carbide measuring faces (Metav IndustryLine)

The M312.152.S is a three‑point internal micrometer designed for precise measurement of blind holes in larger components, suitable for workshop, toolroom and inspection bench use.

• Three-point contact for stable interior measurement
• Carbide measuring faces for wear resistance
• Ratchet stop for reproducible measuring force
• Supplied in transport box for safe storage

Precision that reduces rework and speeds inspection

The M312.152.S delivers an accuracy of 0.009 mm combined with a reading resolution of 0.005 mm, giving a measurable advantage where tight tolerances matter. The three‑point contact geometry centres reliably in cylindrical interiors, which reduces alignment errors and the need for repeat measurements. As an analogue vernier instrument with a matt chrome‑plated scale and vernier, it offers an immediate, maintenance‑light solution for routine dimensional checks while meeting industrial accuracy requirements.

Purpose-built for blind‑hole and deep interior measurement

Engineered specifically for blind‑hole measurement, the instrument features carbide measuring faces that resist wear when used on bore surfaces. With a measuring range of 250–275 mm and a measuring depth of 140 mm, the tool fits the standard size class commonly required in machine and metalworking shops, offering the reach needed for larger bores without sacrificing stiffness. The design ensures contact stability deep inside a workpiece, making it suitable for aligned bores, housings and assemblies.

Consistent handling and reproducible results on the bench

A built‑in ratchet stop guarantees a uniform measuring force, improving reproducibility across multiple operators and batches. The matt chrome‑plated scale and vernier minimise glare under workshop lighting and support quick reading. Note that delivery is without a setting ring, so calibration or reference setting should be performed prior to first use; the instrument is supplied in a protective transport box to safeguard the measuring faces during storage and transit.

Robust construction for regular workshop use

Materials and finishing prioritise longevity: scale and vernier are matt chrome‑plated for robustness, while the carbide measuring faces stand up to abrasive contact surfaces. The analogue mechanism is straightforward to service and avoids dependency on batteries or electronic interfaces. Backed by Metav IndustryLine’s quality control, the instrument offers a practical balance of durability and metrological performance that supports steady throughput and fewer inspection interruptions.

Choose the Metav IndustryLine M312.152.S for reliable, workshop‑grade blind‑hole measurement and contact Metav Werkzeuge in Emmerich for tailored advice by email or phone.

Technical data

• Article number: M312.152.S
• GTIN: 4054469158747
• ECLASS: 21170335
• ETIM: EC003590
• Tariff number: 90173000

Facts

• Measuring range: 250–275 mm
• Measuring depth: 140 mm
• Accuracy: 0.009 mm
• Reading resolution: 0.005 mm
• Weight: 5 kg

Special features

• Three‑point internal measurement
• Carbide measuring faces
• Analogue vernier, matt chrome‑plated scale and vernier
• Ratchet stop for consistent measuring force
• Designed for blind‑hole measurement
• Supplied without setting ring
• Delivered in a transport box

FAQ

How accurate is this internal micrometer?
The M312.152.S achieves an accuracy of 0.009 mm with a reading resolution of 0.005 mm, suitable for routine workshop and inspection tasks where sub‑hundredth‑millimetre precision is required.

Can this instrument measure blind holes?
Yes — the three‑point measuring head and 140 mm measuring depth are expressly designed for blind‑hole measurement, providing stable contact and centred readings inside bores.

Are the measuring faces durable for frequent use?
The M312.152.S uses carbide (hard metal) measuring faces, which provide high wear resistance and long service life even under regular workshop use.

Is a setting ring included for calibration?
No — the delivery is without a setting ring; the micrometer should be set against a suitable reference standard before first use to establish traceable readings.

Is this an electronic instrument and does it need batteries?
This is an analogue vernier instrument and does not require batteries or electronic interfaces, making it immediately usable on the workshop bench.

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