50-75mm Digital Three-Point Internal Gauge Two Heads, IP65, Carbide Measuring Faces, Setting Ring, Supplied in Case - Metav IndustryLine

Take advantage of the combination of robust environmental protection, carbide measuring faces and a high-resolution digital display for consistent bore measurement results; order the instrument directly via Metav Werkzeuge or contact our consultants for application advice.

Digital three-point internal micrometer M312.288.PN — IP65, carbide faces, two measuring heads

The Digital three-point internal micrometer M312.288.PN is a precise instrument for internal diameter checks in workshop and inspection environments, covering the 50–75 mm range with a deep reach and rugged protection

Three-point measuring mechanism for stable contact IP65 protection against dust and water Carbide measuring faces for long wear resistance Includes setting ring and 150 mm extension

Precise results where repeatability matters

The three-point mechanism provides a concentric contact that reduces measurement scatter compared with single-point probes; combined with a resolution of 0.001 mm and a stated accuracy of ±0.005 mm, the instrument delivers repeatable readings for quality control tasks. The solid measuring contact surfaces are carbide, resisting wear in daily shop use and preserving measurement integrity over longer service intervals. These technical properties support a rational decision: fewer rechecks, clearer pass/fail decisions and faster throughput on inspection benches.

Built for workshop conditions and integration

An IP65 rating shields the electronics from coolant splashes and airborne grit, allowing the gauge to be used at near-production positions without immediate risk. The built-in digital display offers ON/PRESET, mm/inch switching and HOLD functions for quick reading and documentation. For traceable data capture, the unit provides a RB 6 data output for connection to recording devices or gauge interfaces, enabling integration into existing measurement workflows and statistical process control routines. This combination of ruggedness and connectivity supports efficient, low-friction process control.

Practical handling and application benefits

Two interchangeable measuring heads extend the usable range across the 50–75 mm band while keeping the instrument compact and easy to manoeuvre; a measuring depth of 127 mm accommodates deeper bores and stepped features. The delivery includes a setting ring and a 150 mm extension, which simplify setup and allow calibration against a known reference. Supplied in a transport case, the instrument is protected in transit and ready to be stored safely between uses — a practical detail that reduces downtime and maintains instrument condition.

Designed for typical workshop use and blind-hole measurement

Constructed to DIN 863 standards, the gauge is suitable for frequent bench checks on machined components and, specifically, for reliable internal measurements including blind holes. The robust construction and carbide contacts make it appropriate for serial inspection in metalworking shops, toolrooms and fixture testing. For teams seeking dependable measurement data with minimal operator influence, this instrument offers a technically grounded solution that balances precision with everyday usability.

For precise bore measurement solutions from Metav IndustryLine, contact Metav Werkzeuge GmbH in Emmerich for ordering and technical consultation: info@metav-werkzeuge.com • +49 2822 7131930 — Metav Werkzeuge will advise on configuration and delivery to the workshop.

Technical data

• SKU: M312.288.PN
• GTIN: 4054469179292
• eClass: 21170335
• ETIM: EC003590

Facts

• Measuring range: 50–75 mm
• Measuring depth: 127 mm
• Resolution (reading): 0.001 mm
• Accuracy: ±0.005 mm
• Weight: 3.5 kg
• Extension: 150 mm
• Protection class: IP 65
• Data output: RB 6

Special features

• Digital display with ON/PRESET, mm/inch and HOLD
• Two measuring heads for range coverage
• Carbide measuring faces
• Includes setting ring and extension
• Conforms to DIN 863
• Suitable for blind-hole measurement
• Delivered in transport case

FAQ

What measuring range does the gauge cover and how is it delivered?
The M312.288.PN covers 50–75 mm and is supplied with a setting ring, a 150 mm extension and a transport case for safe handling.

How accurate is the measurement and what resolution can be expected?
The instrument provides a reading resolution of 0.001 mm with a stated accuracy of ±0.005 mm, suitable for demanding workshop control tasks.

Is the device suitable for use at machine benches where coolant and chips are present?
Yes, the IP65 protection rating and robust construction make the gauge appropriate for near‑production inspection points and machine‑side checks.

Can measurement data be output to external systems?
The gauge offers a RB 6 data output for connection to data acquisition systems and external counters, facilitating documentation and statistical evaluation.

What materials are used at the measuring contact faces?
The measuring faces are carbide, chosen for wear resistance and consistent contact geometry during repetitive use.

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