50-100mm Three-Point Internal Micrometer Digital With Measuring Drum Scale, IP65 - Metav IndustryLine

Take advantage of the combination of three‑point internal measurement, a digital readout with 0.005 mm readability, and robust shop‑floor protection for reliable blind‑hole inspection — order the instrument directly via Metav Werkzeuge or contact our consultants for specification advice.

M312.277.M – Three‑point internal micrometer set, digital, IP65 (50–100 mm) by Metav IndustryLine

The M312.277.M is a digital three‑point internal micrometer set designed for precise measurement of confined bores and blind holes in precision engineering and quality‑control environments.

• Digital display with ABS/INC/UNIT functions
• Three‑point jaws for reliable blind‑hole measurement
• IP65 protection for industrial shop floors
• Includes setting ring and 150×Ø23.4 extension

Precise internal measurement where space is tight

The three‑point measuring principle provides a stable contact geometry that centres automatically in the bore, reducing eccentricity and improving repeatability when measuring blind holes. With a measurement range of 50–100 mm and a readability of 0.005 mm, this instrument sits in the micro class for fine mechanical work, offering the stiffness required for short, resistance‑free measuring strokes. The integrated measuring drum with scale supports quick visual checks while the digital readout removes interpolation errors common to manual reading devices.

Designed for repeatable shop‑floor performance

Built to withstand workshop conditions, the set features an IP65 rating that shields electronics from dust and low‑pressure water jets. The matt chrome‑plated scale and vernier resist glare and preserve legibility over prolonged use, while hardened measuring faces ensure wear resistance and long service life. Compliance with DIN 863 underlines manufacturing tolerances; the robust construction and calibrated mechanics reduce downtime and extend intervals between servicing.

Simple operation and secure data handling

The electronic module offers ON/OFF/SET and ABS/INC/UNIT keys for straightforward switching between absolute and incremental modes and for unit selection. A dedicated data output (RB 4.1) enables connection to inspection systems or data loggers for traceable records and process control. The package includes a setting ring and an extension (150×Ø23.4) for deep or recessed bores, so the instrument is ready for immediate use in measurement routines without additional accessories.

Practical benefits for inspection and assembly processes

Supplied as a purpose‑built set, the instrument reduces instrument changeover time and simplifies handling during serial inspection or assembly checks. The three‑point geometry is particularly effective for eccentricity‑sensitive parts and interrupted bores, delivering consistent centre alignment and minimised operator influence. The digital display and output capability support quality documentation and integrate with established metrology workflows, increasing throughput while preserving measurement confidence.

Contact Metav Werkzeuge for a tailored quote or technical consultation on the M312.277.M three‑point internal micrometer set and ensure the instrument matches the specific bore inspection tasks in your workshop

Technical data

• Article number: M312.277.M
• GTIN: 4054469162478
• Manufacturer: Metav IndustryLine

Facts

• Measurement range: 50–100 mm
• Readability: 0.005 mm
• Weight: 5.6 kg
• Standard: DIN 863
• Tariff number: 90173000

Special features

• Three‑point internal measurement for blind holes
• Digital display with ON/OFF/SET and ABS/INC/UNIT
• Data output: RB 4.1
• IP65 protection class
• Measuring drum with scale
• Matt chrome‑plated scale and vernier
• Hardened measuring faces
• Includes setting ring and extension 150×Ø23.4
• Supplied as a set

FAQ

How accurate is the measurement on this set?
The M312.277.M delivers a readability of 0.005 mm and, as a three‑point internal micrometer set, offers high repeatability for internal diameters within the 50–100 mm range.

Can the instrument measure blind holes reliably?
Yes; the three‑point jaw geometry of this set is specifically designed for blind‑hole measurement, ensuring automatic centring and consistent contact across the bore.

Is the display suitable for integration into data systems?
The digital module on the M312.277.M provides a data output (RB 4.1) for connection to data loggers or inspection software to support traceable measurement records.

What accessories are supplied with the set?
The instrument is supplied with a setting ring and an extension 150×Ø23.4, enabling immediate use for recessed or deep bore inspection tasks.

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