20-25mm Three-Point Internal Micrometer For Blind Holes, Matt Chrome Scale And Vernier, Supplied With Setting Ring And Extension In Case - Metav IndustryLine

Take advantage of the combination of 0.005 mm accuracy, three-point centring and included calibration accessories for reliable blind‑hole measurements; order directly via Metav Werkzeuge or consult our specialists for application advice.

Three‑point internal micrometer M312.135.P — analogue 20–25 mm range, high‑precision measurement (Metav IndustryLine)

Three‑point internal micrometer M312.135.P is designed to measure blind‑hole bores with centred contact and repeatable results in precision engineering and quality control.

• Three‑point contact for blind‑hole measurement
• Precision accuracy 0.005 mm
• Range 20–25 mm, analogue scale
• Includes setting ring and extension

Accurate centring for blind‑hole measurement that reduces rework

The three‑point contact principle delivers reliable centring inside blind bores, making the instrument ideal where concentricity and repeatability matter. With a measuring range of 20–25 mm and a mechanical resolution matched to its accuracy, the device performs direct internal measurements without the need for transfer gauges. This reduces handling steps and the risk of cumulative error, which speeds up inspection cycles in small‑bore production and assembly tasks.

Robust analogue construction for professional workshop use

A matt‑chrome scale and vernier provides a clear, low‑glare reading surface and long service life. The measuring faces are hardened, resisting wear and ensuring stable results over prolonged use. Supplied with a setting ring and a depth extension (150 x Ø16.7 mm), the instrument is ready for on‑site verification and deeper blind holes. The analogue design keeps operation straightforward while delivering ±0.005 mm mechanical precision expected in high‑accuracy metrology.

Compact classification and suited applications in precision work

With a maximum measuring range of 25 mm this micrometer falls into the micro category for compact, high‑precision instruments — a format favoured in fine mechanical engineering and detailed component inspection. The combination of three‑point geometry, hardened contacts and included accessories makes it a practical choice for workshops, tool rooms and inspection benches that require dependable internal measurements without complex setup.

Choose the Metav IndustryLine three‑point internal micrometer for dependable blind‑hole measurement; contact Metav Werkzeuge in Emmerich for tailored advice and order support at info@metav-werkzeuge.com or call +49 2822 7131930

Technical data

• Article number: M312.135.P
• GTIN: 4054469158648
• Category: Internal micrometer (three‑point)
• Manufacturer: Metav IndustryLine

Facts

• Measuring range: 20–25 mm
• Accuracy: 0.005 mm
• Reading / resolution: 0.005 mm
• Weight: 1.2 kg
• Overall length: 80 mm
• Setting ring: 25 mm
• Extension: 150 x Ø16.7 mm
• Tariff number: 90173000

Special features

• Three‑point centring contact
• Analogue vernier reading
• Scale and vernier matt‑chrome plated
• Hardened measuring faces
• Suitable for blind‑hole bores
• Supplied with setting ring and extension

FAQ

What types of holes can be measured with this micrometer? The three‑point internal micrometer M312.135.P is specifically suited to blind‑hole bores, providing centred contact on the bore wall for repeatable internal diameter measurements.

What accuracy can be expected in routine inspection? Expect an accuracy of 0.005 mm with this analogue instrument; the mechanical design and hardened faces support consistent results in workshop conditions.

Is a calibration certificate included? The micrometer is supplied with a setting ring for verification; formal calibration status is not indicated in the product data and should be confirmed with Metav Werkzeuge if a certificate is required.

Can deeper blind holes be measured with the supplied accessories? Yes, the supplied extension (150 x Ø16.7 mm) enables measurement of deeper blind bores while maintaining the three‑point contact principle.

Which workshop tasks is this instrument best suited for? This compact, high‑precision instrument is well suited to fine mechanical work, tool‑room inspections and quality checks where internal diameters between 20 and 25 mm must be measured reliably.

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