100-125mm Three-Point Internal Micrometer For Blind Holes, Digital Display, Hardened Measuring Faces, Supplied In Case - Metav IndustryLine

The combination of a digital readout, a 100–125 mm measuring range and a notable 0.006 mm accuracy provides reliable, repeatable results in blind‑hole inspection. Benefit from a robust measuring depth of 140 mm and integrated data output for process control. Order the instrument directly via Metav Werkzeuge or contact our consultants for application advice.

Three-point internal micrometer M312.256.S — digital, 100–125 mm range (Metav IndustryLine)

The three-point internal micrometer M312.256.S is a precision digital instrument designed for accurate measurement of blind holes and internal diameters in workshop and production environments.

• Digital readout with ABS and mm/inch functions
• Measuring range 100–125 mm
• High precision: 0.006 mm accuracy
• 140 mm effective measuring depth
• Designed for blind-hole measurement

Precise measurement for blind holes and deep bores

The three‑point internal micrometer is engineered specifically for blind‑hole measurement, where a stable contact and centralising interaction are essential. Its three‑point spindle ensures concentric contact with the bore, reducing runout and measurement scatter. With a measuring range of 100–125 mm and an extended reach of measuring depth 140 mm, the gauge covers medium‑sized bores that commonly occur in jigs, housings and larger assemblies. The specified 0.006 mm accuracy supports quality control tasks where tight tolerances are required, improving first‑pass yield and reducing rework.

Digital features that support fast quality control and traceability

Equipped with a digital readout offering ON/0-, mm/inch, ABS, PRESET and HOLD keys, the instrument simplifies reading and shortens inspection time. The display’s resolution of 0.001 mm allows fine judgement of dimensional deviations, while the RB 4 data output enables connection to documentation systems or SPC equipment for process control. These functions together translate into measurable workflow advantages: fewer transcription errors, faster logging of measurements and easier integration into production data streams, helping to maintain consistent quality standards.

Robust construction and workshop usability

The gauge combines a stable frame with hardened measuring faces, improving wear resistance and maintaining measurement integrity over prolonged use. The tool’s mass (approx. 2.6 kg) and ergonomic layout deliver a steady feel when positioning in bores, while the three‑point contact mechanism centres reliably even in slightly tapered cavities. Supplied without an adjustment ring, the instrument is nonetheless suitable for precise setting with standard rings or masters, enabling straightforward calibration routines. Clear labelling of functions and a rugged design reduce downtime and support continuous operation in demanding shopfloor conditions.

For precise internal inspections and reliable data capture, contact Metav Werkzeuge to discuss application suitability or to order the Metav IndustryLine three‑point internal micrometer M312.256.S directly from our Emmerich facility.

Technical data

• Article number: M312.256.S
• GTIN: 4054469158952
• Manufacturer: Metav IndustryLine
• Category: Micrometers / Internal measuring instruments
• Data output: RB 4

Facts

• Measuring range: 100–125 mm
• Resolution: 0.001 mm
• Accuracy: 0.006 mm
• Measuring depth: 140 mm
• Weight: 2.6 kg

Special features

• Digital display: ON/0-, mm/inch-, ABS-, PRESET- and HOLD buttons
• Designed for blind‑hole measurement
• Hardened measuring faces
• Delivery without setting ring

FAQ

What measurement tasks is this instrument optimised for?
The three‑point internal micrometer M312.256.S is optimised for precise inspection of blind holes and medium‑sized internal diameters where a centralising three‑point contact improves repeatability.

How precise is the measurement and what resolution does the display offer?
The instrument achieves an accuracy of 0.006 mm with a display resolution of 0.001 mm, allowing fine discrimination of dimensional deviations during quality checks.

Can measurement data be exported for statistical process control?
Yes. The micrometer provides a RB 4 data output suitable for connection to logging systems or SPC devices to support traceable quality documentation.

Is a setting or calibration ring included with delivery?
Delivery is made without a setting ring; a suitable calibration ring or master should be used to verify or preset the instrument before production measurements.

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