12-20mm Three-Point Internal Micrometer Digital With Measuring Drum Scale, IP65 - Metav IndustryLine

Take advantage of precise blind‑hole inspection and robust workshop operation thanks to the combination of a digital readout with ABS/INC functions, IP65 protection and carbide measuring faces for long service life; order the set directly via Metav Werkzeuge or ask the consultants for application advice.

Three-point internal micrometers M312.275.M — Digital set for blind‑hole and small‑bore measurement, 12–20 mm, Metav IndustryLine

Three-point internal micrometers M312.275.M provide a compact, workshop‑ready solution for accurate measurement of small bores and blind holes in production and maintenance environments.

• Digital display with ABS/INC/UNIT keys
• IP65 dust and splash protection
• Carbide measuring faces for wear resistance
• Includes setting ring and extension

Precision tailored to miniature bores for consistent quality control

The three‑point measuring principle delivers concentric contact around the bore, which stabilises readings and reduces positioning error compared with single‑point probes. In the 12–20 mm range this instrument classifies as a micro measuring tool, ideal where compactness and high repeatability matter — for example in watchmaking, valve seats and small hydraulic components. The carbide measuring faces resist wear, so calibration intervals extend and measurement costs fall; conformity with DIN 863 ensures the mechanical design meets recognised workshop standards.

Clear digital readout and industrial connectivity for faster throughput

A digital display with ON/OFF/SET and ABS/INC/UNIT keys gives unambiguous readings and quick switching between absolute and incremental modes, reducing transcription errors during batch inspection. The measuring drum includes a dedicated scaling feature for tactile fine adjustment, while the RB 4.1 data output provides a direct interface for data collection and SPC logging — enabling immediate traceability and integration into existing quality workflows. The IP65 protection rating keeps electronics safe from chips and coolant mists, supporting reliable use at the bench or on the shop floor.

Practical set‑up and accessories to streamline measurement tasks

Delivered as a two‑piece set with a setting ring and a 150 × Ø11.7 mm extension, the instruments are ready for fast set‑up and for measuring blind holes without complex adapters. The compact weight and robust finish make the set easy to handle in repetitive tasks, while the matt‑chrome scale and vernier surfaces aid legibility under workshop lighting. Because the design focusses on durability and simple operation, inspection routines become quicker and less error‑prone, which improves process yield and reduces rework.

Contact Metav Werkzeuge today to discuss how the Metav IndustryLine three‑point internal micrometer set M312.275.M can improve bore inspection in your production — call +49 2822 7131930 or e‑mail info@metav-werkzeuge.com for tailored advice and delivery information.

Technical data

• SKU: M312.275.M
• GTIN: 4054469162454
• Manufacturer: Metav IndustryLine
• Norm: DIN 863
• Protection class: IP 65

Key figures

• Measuring range: 12–20 mm
• Minimum range: 12 mm
• Maximum range: 20 mm
• Resolution / reading: 0.005 mm
• Weight: 1.8 kg
• Pieces per set: 2
• Extension: 150 × Ø11.7 mm

Materials & features

• Scale and vernier matt chrome‑plated
• Carbide measuring faces (hard metal)
• Measuring drum with scaling
• Digital readout with ON/OFF/SET and ABS/INC/UNIT keys
• Data output: RB 4.1
• Suitable for blind‑hole measurements
• Delivered as a set with setting ring and extension
• Set design for workshop and production use

FAQ

What measurement range is covered by the set?
The instruments cover a measuring range of 12–20 mm, making them suitable for small‑bore inspection tasks in fine mechanical and general workshop applications.

Can the micrometers measure blind holes?
Yes, the set is explicitly suitable for blind‑hole measurements and is supplied with a fitting extension (150 × Ø11.7 mm) to reach into recesses.

How is the display operated and what modes are available?
The digital display features ON/OFF/SET and ABS/INC/UNIT keys, allowing instant selection of absolute or incremental measurement modes for flexible inspection routines.

Is the instrument protected for use in production environments?
The micrometers have IP65 protection for resistance against dust and splashes, and the carbide measuring faces provide wear resistance for prolonged workshop use.

Does the set support data logging?
Yes, the instruments provide a RB 4.1 data output for connection to data collection systems and SPC processes.

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