275-300mm Three-Point Internal Micrometer Digital, 0.001mm Resolution, Hardened Measuring Faces, Supplied in Case - Metav IndustryLine

Take advantage of a robust combination of high measuring depth, clear digital readout and three‑point contact for reproducible internal measurements; order the instrument directly via Metav Werkzeuge or consult our specialists for application advice.

Three‑point internal micrometer M312.263 — digital, 275–300 mm range

Three‑point internal micrometer M312.263 is a digital instrument designed for accurate internal diameter measurement of medium‑sized bores in machine and toolmaking applications.

• Digital display with mm/inch and ABS
• Measuring range 275–300 mm
• Measuring depth 140 mm
• Delivered in protective case

Precision where larger internal diameters must be checked reliably

The M312.263 employs a three‑point contact system that centres automatically in bores, reducing alignment error and delivering consistent contact geometry for repeatable results. With a stated accuracy of 0.009 mm and a display resolution of 0.001 mm, the device is engineered for tasks where reproducibility across multiple components is essential. The instrument’s measuring range 275–300 mm places it in the standard workshop bracket for internal gauges, offering the reach needed for housings and medium assemblies while retaining manageable stiffness and handling.

Clear digital readout and integrated data transfer for efficient measurement logging

Equipped with a digital display that includes ON/0, mm/inch, ABS, PRESET and HOLD functions, the micrometer simplifies measurement routines and reduces reading errors. The provided data output (RB 4) enables direct transfer of measured values into SPC or QA systems, accelerating documentation and traceability. The combination of fast digital feedback and a reliable interface supports lean quality workflows and helps maintain throughput in batch inspection processes.

Robust workshop design and straightforward transport

Constructed for everyday use in production environments, the instrument features hardened measuring faces for wear resistance and a compact form that balances rigidity with a transportable footprint. The tool weighs approximately 5 kg and is supplied in a protective case suitable for safe delivery and storage. Note that the scope of delivery excludes a setting ring; the absence of an adjustment ring should be considered when planning calibration fixtures or reference standards.

Ideal fit for standard machine‑shop inspection tasks

Classified in the standard measuring range category, this micrometer is aimed at machine shops and quality departments that require mid‑range internal measurement capability without resorting to heavier long‑balken solutions. The measuring depth 140 mm supports access into recessed bores and stepped geometries, enabling internal, step and shoulder checks with the same instrument. Its feature set makes it a practical choice where repeatability, digital readout and data capture are priorities.

Contact Metav Werkzeuge today to discuss how the M312.263 suits your inspection needs and to arrange delivery from our Emmerich warehouse.

Technical data

• Article number: M312.263
• GTIN: 4054469120058
• ETIM: EC003590
• ECLASS: 21170335
• Data output: RB 4

Core specifications

• Measuring range: 275–300 mm
• Minimum range: 275 mm
• Maximum range: 300 mm
• Measuring depth: 140 mm
• Display resolution: 0.001 mm
• Accuracy: 0.009
• Weight: 5 kg

Features

• Digital display with ON/0, mm/inch, ABS, PRESET, HOLD
• Three‑point internal contact system
• Hardened measuring faces
• Supplied in protective case
• Delivery without setting ring

FAQ

What bore sizes can be measured with this micrometer? The three‑point internal micrometer M312.263 covers bores within the 275–300 mm range and is intended for medium‑sized internal diameter inspection.

How precise are the measurements from this instrument? The instrument has an indicated accuracy of 0.009 mm with a digital resolution of 0.001 mm, suitable for repeatable workshop measurements where fine tolerance control is required.

Does the device support data transfer to quality systems? Yes, the micrometer offers a data output described as RB 4 for integration into measurement logging or SPC workflows.

Is a setting ring included for calibration? The scope of delivery for the M312.263 does not include a setting ring; calibration and reference standards must be arranged separately.

Are the measuring faces durable for regular workshop use? The tool is supplied with hardened measuring faces to resist wear in routine inspection tasks, supporting long‑term stability.

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