8–12mm Three-Point Internal Digital Gauge, Two Heads, IP65, Extension, Setting Ring - Metav IndustryLine

Benefit from precise three‑point measurement, industrial protection and an intuitive digital display — the ideal combination for reliable bore inspection and repeatable results. With a measuring depth of 55 mm and an included extension and setting ring, workflow interruptions are reduced; order the unit directly via Metav Werkzeuge or consult our specialists for application advice.

M312.284.PN — Digital three‑point internal micrometer, IP65, 8–12 mm

The M312.284.PN is a digital three‑point internal micrometer designed for accurate measurement of small bores and blind‑hole applications in production and quality control.

• IP65‑rated for workshop environments
• High resolution: 0.001 mm reading
• Suitable for blind‑hole measurements
• Includes extension and setting ring

Reliable three‑point measurement for repeatable bores

The device uses a three‑point contact principle that centres automatically in the bore, reducing eccentricity and delivering stable values even in short or blind holes. The instrument covers an effective measuring range of 8–12 mm (arranged as two heads for 8–10 mm and 10–12 mm), offers a display resolution of 0.001 mm and an operational accuracy of ±0.004 mm. Compliance with DIN 863 ensures the device fits into established inspection routines, making it suitable for serial checks and in‑process control where small diameter tolerances matter.

Robust design for daily shop‑floor use

Built to withstand industrial conditions, the micrometer carries an IP65 rating that protects the electronics against dust and water jets, so measurements remain reliable near machining centres. The instrument’s measuring depth of 55 mm and a supplied 100 mm extension extend its reach into deeper bores while preserving stability. At 1.8 kg, the unit balances mass for steady handling with manoeuvrability on the bench — the included setting ring speeds calibration and repeat setup, cutting downtime between batches.

Fast readout and traceable data capture

A clear digital display offers ON/PRESET, mm/inch selection and a HOLD function for convenient readings in awkward positions. Data output via RB 6 enables straightforward connection to SPC systems or handheld loggers, supporting automated data collection and traceability. Two measuring heads reduce tool changes for adjacent diameter ranges, while the preset capability and the supplied adjustment ring allow rapid setup, helping to increase throughput and lower scrap rates in high‑mix production.

Contact Metav Werkzeuge in Emmerich for a technical consultation on the M312.284.PN and to arrange delivery or tailored measurement solutions

Technical Data

• SKU: M312.284.PN
• GTIN: 4054469179254
• Manufacturer: Metav IndustryLine

Core technical data

• Measuring range: 8–12 mm (8–10 mm + 10–12 mm)
• Resolution: 0.001 mm
• Accuracy: ±0.004 mm
• Measuring depth: 55 mm
• Extension length: 100 mm
• Protection class: IP65
• Weight: 1.8 kg
• Standard: DIN 863

Features and accessories

• Digital display with ON/PRESET, mm/inch and HOLD
• Two measuring heads for adjacent ranges
• Three‑point internal measuring principle
• Data output: RB 6
• Supplied with setting ring and extension
• Suitable for blind‑hole measurements

FAQ

How accurate is the measurement with this three‑point instrument?
The M312.284.PN delivers an operational accuracy of ±0.004 mm and a display resolution of 0.001 mm, suitable for fine bore inspection and routine quality control in production.

Can the device be used in wet or coolant‑rich environments?
Yes. The M312.284.PN carries an IP65 rating, offering protection against dust and water jets so it is appropriate for use near machining centres and coolant zones.

Is this tool suitable for blind‑hole bores?
The instrument is specifically designed for blind‑hole measurements and includes extensions and a setting ring to reach and calibrate shallow and deeper blind holes.

How can measurement data be exported for SPC?
Data is exported via the RB 6 interface, enabling simple connection to SPC systems or handheld data collectors for traceable logging of bore measurements.

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