30-50mm Digital Three-Point Internal Measuring, Two Heads, HM Measuring Faces, IP65, With Setting Ring And Extension - Metav IndustryLine

Take advantage of high-precision measurement, robust protection to IP65 and carbide contact faces for reliable internal inspections; the instrument’s ±0.005 mm accuracy and included setting ring with extension support consistent results in blind-hole applications. Order the M312.287.PN directly via Metav Werkzeuge or contact our consultants for specification matching.

M312.287.PN — Digital three-point internal micrometer, 30–50 mm, IP65

The M312.287.PN is a digital three-point internal micrometer designed for precise internal diameter measurement in tight and blind-hole environments, combining a sealed construction with carbide contact faces for workshop and production use.

• Digital three-point internal measurement 30–50 mm
• Two measurement heads with digital display
• Carbide measuring faces, protected to IP65
• Delivered with setting ring and extension

Precise, repeatable readings for critical bore inspection

The instrument delivers an accuracy of ±0.005 mm, making it suitable where narrow tolerances are required. The digital display includes ON/PRESET, mm/inch and HOLD functions to support repeatable documentation of readings, while the two measuring heads provide stable contact with the bore during rotation. Compared with standard digital callipers, this device is tailored to interior diameters and blind-hole tasks, offering a measurement concept that reduces operator-induced variation and improves throughput in routine inspections.

Rugged design for the shop floor and protected measurement heads

A sealed housing with IP65 protection guards electronics against coolant and dust, allowing the device to be used near machining operations without immediate risk to the display. The carbide measuring faces ensure long-term wear resistance when probing metallic bores, and the instrument’s overall construction balances robustness with handling convenience. Supplied in a transport box, the micrometer is ready for stable storage and safe movement between measuring stations.

Simple setup, calibration traceability and practical operation

The tool includes a setting ring and an extension (150 mm) for flexible adaptation to different bore depths, and the measuring depth of 105 mm extends capability into deeper cavities. The DIN 863 conformity provides a familiar reference for workshop technicians; calibration and adjustment procedures align with industry practice so that measurement chains remain auditable. The digital readout’s mm/inch toggle and HOLD function simplify data capture and reduce transcription errors during quality control.

Application-focused benefits and typical use cases

Engineered for blind-hole and internal bore inspection in precision assemblies, the device performs especially well in watchmaking, instrument parts, mould inserts and small housing bores where a compact measuring range is required. Classified in the micro category (max range up to 100 mm), this instrument offers the stiffness and fine resolution expected for small-bore metrology, while features such as the sealed electronics and carbide faces extend its service life in mixed production environments.

Contact Metav Werkzeuge for an application review and secure the M312.287.PN for consistent, shop-floor-ready internal measurements

Technical Data

• Article number: M312.287.PN
• GTIN: 4054469179285
• Manufacturer: Metav IndustryLine
• Protection rating: IP 65
• Standard: DIN 863
• Display functions: ON/PRESET, mm/inch, HOLD

Facts

• Measuring range: 30–50 mm
• Accuracy: ±0.005 mm
• Measuring depth: 105 mm
• Weight: 2.2 kg
• Extension: 150 mm
• Tariff number: 90173000
• eCl@ss: 21170335
• ETIM: EC003590

Special features

• Two measurement heads with digital readout
• Carbide (HM) measuring faces
• Suitable for blind-hole measurement
• Supplied with setting ring and extension
• Kitted in transport box for safe handling

FAQ

How precise is the measurement with this instrument?
The M312.287.PN achieves an accuracy of ±0.005 mm, delivering high-resolution readings suitable for precision internal bore inspection.

Can the device be used in wet or dirty workshop conditions?
Yes, the instrument is rated IP65, which protects the electronics from dust and low-pressure water jets commonly encountered near machining centres.

Is the M312.287.PN suitable for blind-hole measurements?
The instrument is explicitly designed for blind-hole use and is supplied with a setting ring and extension to facilitate measurement in recessed bores.

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