16-20 mm Three-Point Internal Micrometer With Measured Drum And Scale, IP65 - Metav IndustryLine

Benefit from high repeatability and robust workshop protection: the micrometer’s digital readout, three‑point measuring system and IP65 rating deliver reliable blind‑bore measurements with ±0.005 mm accuracy. Order the instrument directly via Metav Werkzeuge or ask our consultants for application advice.

Three‑point internal micrometer M312.234.M — digital instrument with IP65

A Three‑point internal micrometer M312.234.M designed for precise measurement of blind bores and small internal diameters in the 16–20 mm range.

• Digital display with ABS/INC/UNIT functions
• Three‑point measuring system for concentric contact
• Accuracy ±0.005 mm for high repeatability
• IP65 protection for workshop environments

Accurate internal measurement for critical bore tolerances

The micrometer combines a three‑point measuring system with a finely graduated measuring drum to deliver stable contact around the circumference of a bore, reducing eccentricity errors common with two‑point probes. The instrument’s accuracy of ±0.005 mm places it in the high‑precision bracket suitable for quality control tasks where small deviations matter. The digital display supports ABS/INC and unit selection, allowing quick transcriptions and fewer manual conversions. These technical characteristics translate into measurable time savings during inspection routines and fewer rework cycles on production parts.

Rugged design and calibrated readiness for the workshop

Constructed with a matt‑chrome plated scale and vernier for durable legibility, the micrometer meets DIN 863 standards and is supplied with a setting ring and an extension (150×Ø11.7) for flexible use in deeper or awkward bores. The IP65 rating ensures reliable performance in environments with dust and coolant exposure, while the total weight and compact 80 mm length make the instrument easy to handle for repetitive measurements. The inclusion of a clear scale on the drum supports a fast visual check, complementing the electronic readout for redundancy during routine inspections.

Designed for blind‑bore workflows and data capture

Specifically suited to blind bores, this instrument covers the measurement range 16–20 mm, a category commonly required for precision components and small assemblies. The three‑point contact geometry provides concentric pressure around the bore, improving repeatability in serial checks. For traceability and integration into digital measurement systems, a data output RB 4.1 is provided, enabling straightforward transfer of readings into SPC or inspection software. Supplied as a ready‑to‑use precision tool from Metav IndustryLine, it supports both standalone measurements and automated data collection within a connected quality process.

For a tailored specification check and prompt supply, contact Metav Werkzeuge — the Metav IndustryLine team will recommend the best configuration and confirm compatibility with existing inspection systems

Technical Data

• Article number: M312.234.M
• GTIN: 4054469156408
• ECLASS: 21170335
• ETIM: EC003590

Facts

• Measurement range: 16–20 mm
• Accuracy / resolution: 0.005 mm
• Length: 80 mm
• Weight: 1 kg
• Protection class: IP 65

Special features

• Digital display with ON/OFF/SET and ABS/INC/UNIT
• Measuring drum with scale
• Includes setting ring and extension (150×Ø11.7)
• Suitable for blind bores
• Scale and vernier matt‑chrome plated
• Complies with DIN 863
• Data output: RB 4.1

FAQ

How accurate is the three‑point internal micrometer for small bore inspection?
The micrometer achieves an accuracy of ±0.005 mm, making it suitable for high‑precision checks and repeatable quality control of internal diameters.

Can the instrument measure blind bores reliably?
Yes, the three‑point contact design is specifically intended for blind bores, providing concentric contact and improved repeatability in such applications.

Is the micrometer workshop‑ready against dust and coolant?
The instrument is rated IP65, offering protection against dust ingress and low‑pressure water jets typically encountered in machining environments.

What accessories are supplied with the micrometer?
Delivery includes a setting ring and an extension (150×Ø11.7) to adapt the instrument for deeper or recessed bores.

Can measurement data be exported for SPC or inspection software?
A data output RB 4.1 is available for digital transfer of readings into external data capture or SPC systems.

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