75-100mm Digital Three-Point Internal Measuring Gauge, Two Heads, HM Measuring Faces, IP65, Calibration Box, Setting Ring - Metav IndustryLine

Benefit from the combination of high precision, robust protection and practical accessories to streamline bore inspection workflows; the device delivers repeatable results for routine quality control and can be ordered directly via Metav Werkzeuge or discussed with their specialists.

M312.289.PN Digital three-point internal gauge, IP65, carbide faces (Metav IndustryLine)

The M312.289.PN is a digital three-point internal gauge designed for precise measurement of bores and blind holes in workshop and inspection environments

• Digital readout with dual measuring heads
• IP65 dust and splash protection
• Carbide measuring faces for wear resistance
• Suitable for blind‑hole measurement

Robust accuracy for reliable quality control

The three‑point measuring principle is implemented here to provide stable contact with the bore, reducing eccentricity and repetition errors; this results in a documented accuracy of ±0.005 mm and a high resolution of 0.001 mm on the display, which is particularly valuable for workshop metrology and first‑piece inspection. The dual‑head configuration covers overlapping ranges (75–88 mm and 87–100 mm), allowing continuous coverage within the 75–100 mm span without recalibration between subranges. The digital readout features ON/PRESET, mm/inch and HOLD functions to simplify data capture and reduce transcription errors during serial checks.

Practical operation and measurement versatility

Operation is assisted by an 87 mm setting ring and an included 150 mm extension, enabling straightforward transfer of master settings and access to deeper bores where required; the instrument reaches a measuring depth of 127 mm. The instrument is designed for four‑way measurement capability — inside, outside, depth and step — where applicable, and is especially adapted for blind‑hole measurement, offering consistent results even in recessed scenarios. The compact electronic interface with data output RB 6 supports integration into data‑logging workflows for traceable inspection records, improving throughput and reducing manual entry time.

Durability, standards and workshop suitability

Constructed with carbide measuring faces, the gauge resists wear during repetitive use, maintaining measurement integrity in metalworking environments; the IP65 protection rating ensures reliable operation in dusty or splash‑prone areas on the shop floor. Compliance with DIN 863 reflects conventional workshop metrology practice, and the instrument comes with practical accessories — a setting ring and an extension — to support routine calibration and set‑up. The overall design balances stiffness and handling so that the 75–100 mm range performs as a dependable standard tool for machining, tooling and quality departments.

Contact Metav Werkzeuge for tailored application advice and to discuss integration of the M312.289.PN three‑point internal gauge into inspection routines

Technical data

• Article number: M312.289.PN
• GTIN: 4054469179308
• SKU: M312.289.PN

Core specifications

• Measuring range: 75–100 mm (75–88 + 87–100)
• Resolution: 0.001 mm
• Accuracy: ±0.005 mm
• Measuring depth: 127 mm
• Weight: 5 kg
• Protection class: IP65

Special features

• Carbide (HM) measuring faces
• Digital display with ON/PRESET, mm/inch, HOLD
• Two measuring heads (dual range coverage)
• Data output: RB 6
• Included accessories: setting ring, extension (150 mm)
• Suitable for blind‑hole measurements
• Conforms to DIN 863

FAQ

How precise is the instrument for routine inspection tasks?
The instrument offers an accuracy of ±0.005 mm and a display resolution of 0.001 mm, making the M312.289.PN suitable for demanding workshop metrology and repeatable bore checks.

Can the gauge be used for blind‑hole measurement?
Yes, the gauge is configured for blind‑hole measurement and includes an extension and setting ring to reach and set deeper bores reliably.

Is the device protected against shop‑floor conditions?
The device is rated IP65, providing protection against dust ingress and low‑pressure water jets, which helps maintain performance in typical workshop environments.

What accessories are delivered with the gauge?
Delivery includes an 87 mm setting ring and a 150 mm extension, enabling quick transfer of settings and extended measuring depth.

Does the instrument support data capture for quality documentation?
A data output interface (RB 6) is provided to enable connection to data‑logging systems for traceable measurement records.

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