8–10mm Three-Point Internal Digital Gauge With Setting Ring, IP65 - Metav IndustryLine

Take advantage of a compact, workshop-ready instrument that combines high resolution, robust ingress protection and practical accessories for blind-bore measurement; the device’s 0.001 mm display and IP65 rating ensure repeatable results in industrial environments. Order the M312.231.PN directly via Metav Werkzeuge or ask our consultants if needed.

Digital three-point internal micrometer M312.231.PN — 8–10 mm, IP65 (Metav IndustryLine)

The Digital three-point internal micrometer M312.231.PN is a precision instrument for fast, reproducible internal diameter checks in blind and through bores, designed for use in machine shops and quality control.

• Three-point internal measurement for blind bores
• Precision resolution 0.001 mm on digital display
• IP65 protection for workshop environments
• Includes setting ring and extension

Repeatable three-point contact for reliable bore checks

The three-point measuring head delivers a centred, self-centring contact around the bore, producing consistent results where single-contact gauges can tilt or misalign. Combined with the 0.001 mm display resolution and a stated accuracy of ±0.004 mm, this instrument minimises operator influence and speeds up inspection loops. For tasks such as control rounds on turned components or verification of reamed seats, the three-point concept reduces measurement scatter and shortens setup time compared with comparator methods.

Built for workshop conditions and quick readout

Rated IP65, the instrument tolerates splash and coolant exposure common at the machine spindle, keeping the electronics safe while maintaining measurement performance. The digital display includes ON/PRESET, mm/inch and HOLD functions for straightforward switching between units and temporary value capture; this supports faster data logging during batch inspections. The integrated data output type RB 6 allows connection to inspection systems or data collectors where traceback and process control are required.

Practical scope and compatible accessories for blind-hole work

With a measuring range of 8–10 mm, the tool sits in the compact "micro" class suited to fine mechanical work and confined bores where short anvils and low bending moments matter. It is supplied with a setting ring and a dedicated extension to reach deeper blind holes, enabling immediate use for common blind-bore checks without separate calibration fixtures. Conforming to DIN 863, the instrument fits established workshop routines and can be incorporated into formal quality checks on production lines.

Integration into inspection routines and operator benefits

The compact weight of 0.7 kg and the clear control layout reduce fatigue and handling errors during repetitive use. As a rational investment, the instrument lowers measurement variability and shortens throughput time in first-article inspection and in-process checks. For teams establishing traceable workflows, the combination of mechanical stability and digital readout supports both manual documentation and electronic data capture, helping to maintain consistent quality across shifts.

For precision internal measurement from Metav IndustryLine, contact Metav Werkzeuge in Emmerich for order and technical consultation at info@metav-werkzeuge.com or +49 2822 7131930

Technical data

• Article number: M312.231.PN
• Label: Digital three-point internal measuring, 8–10 mm, IP65, incl. setting ring
• GTIN: 4054469179070
• Category: Messschrauben (micrometers)

Facts

• Measuring range: 8–10 mm
• Maximum measuring range: 10 mm
• Resolution / display: 0.001 mm
• Accuracy: ±0.004 mm
• Weight: 0.7 kg
• Protection class: IP65
• Tariff number: 90173000

Special features

• Digital display with ON/PRESET, mm/inch and HOLD
• Data output: RB 6
• Conforms to DIN 863
• Includes setting ring and extension (100xØ5,8)
• Suitable for blind-hole measurements

FAQ

What measuring range does this instrument cover?
The M312.231.PN covers an internal measuring range from 8 to 10 mm and is categorised in the compact micro class for fine mechanical work.

How precise is the digital readout?
The digital display on this Metav IndustryLine internal micrometer shows 0.001 mm increments with a stated accuracy of approximately ±0.004 mm, suitable for tight workshop tolerances.

Can this tool measure blind bores?
Yes, the device is specifically prepared for blind-hole measurement and is supplied with a setting ring and extension to reach and verify such features reliably.

Is the instrument suitable for use at the machine?
The IP65-rated design of the instrument enables operation in splash-prone workshop environments, protecting the electronics during routine machine-side inspections.

How can measurement data be exported?
The M312.231.PN offers an RB 6 data output for connection to data collectors or inspection systems to support documented quality control workflows.

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