125-150mm Three-Point Internal Micrometer Digital With ABS/mm/inch Readout, Hardened Measuring Faces, Supplied In Case - Metav IndustryLine

Take advantage of the combination of precise three‑point measurement, a digital display with mm/inch and ABS functions, and robust workshop integration for reliable internal dimension control. Order the three‑point internal micrometer directly via Metav Werkzeuge or ask our consultants if needed.

Three-point internal micrometer M312.257 — Digital inside micrometer, 125–150 mm range (Metav IndustryLine)

The Three-point internal micrometer M312.257 is a digital instrument for accurate internal diameter measurement in medium-sized components, suited to workshop and production use.

• Digital display with mm/inch and ABS
• Three-point precision spindle
• Range 125–150 mm
• Accuracy ±0.006 mm

Precise internal measurement for repeatable results

The instrument delivers consistent internal dimension readings by using a three‑point measuring spindle that centres automatically in bores and recesses. With a measuring range of 125–150 mm and a measuring depth of 140 mm, the tool is designed for medium‑sized components where repeatable centring reduces operator variation. The specified accuracy of ±0.006 mm together with a display resolution of 0.001 mm supports quality checks and first‑article inspections without recourse to more complex gauging systems.

Digital features that streamline inspection workflows

Equipped with a digital display offering ON/0-, mm/inch, ABS, PRESET and HOLD functions, the micrometer simplifies data capture and conversion between metric and imperial units. The integrated data output RB 4 enables connection to readout systems or recording devices, accelerating documentation and reducing transcription errors. These features combine to reduce cycle times during serial inspection and to support traceable measurement routines in production environments.

Robust design for everyday workshop use

Built for regular use in machine shops, the instrument includes hardened measuring faces to resist wear and preserve accuracy under frequent contact. A sturdy frame and an ergonomic thimble support controlled application of measuring force, so each measurement is both comfortable and reliable. The device’s weight of 2.6 kg reflects its solid construction and contributes to stable handling when measuring deep or awkward internal geometries.

Practical scope, handling and limitations

Delivery is without a setting ring; customers should plan for an appropriate reference gauge if traceable zeroing is required. The micrometer’s mechanical concept is tailored to internal diameters within the stated range and is optimised for centred bore measurement rather than highly eccentric or oblong profiles. Where four‑function measurement would be required, note that the instrument is configured specifically for internal diameter tasks and the three‑point spindle ensures rapid centring and repeatable contact geometry.

Contact Metav Werkzeuge in Emmerich for application advice or to order the Metav IndustryLine M312.257 from local stock — our consultants will confirm compatibility with the intended measuring task

Technical data

• Article number: M312.257
• GTIN: 4054469119991
• Manufacturer: Metav IndustryLine

Core technical data

• Measuring range: 125–150 mm
• Resolution: 0.001 mm
• Accuracy: ±0.006 mm
• Measuring depth: 140 mm
• Weight: 2.6 kg
• Data output: RB 4

Special features

• Digital display with ON/0-, mm/inch-, ABS-, PRESET- and HOLD-button
• Three-point measuring spindle for automatic centring
• Hardened measuring faces
• Delivery without setting ring
• Suitable for workshop and production inspection tasks

FAQ

What internal diameters can be measured with this micrometer?
The micrometer covers a measuring range of 125–150 mm, making it suitable for medium‑sized bores and internal features within that span.

How precise are the readings from the instrument?
The device provides a resolution of 0.001 mm and an accuracy of ±0.006 mm, appropriate for routine quality control in metalworking and component production.

Can measurement data be exported electronically?
Yes, the instrument supports data transfer via RB 4 output, allowing integration with inspection software or data loggers.

Are the measuring faces wear‑resistant?
The micrometer is fitted with hardened measuring faces to reduce wear and maintain measurement stability under frequent use.

Does the delivery include a setting ring or reference gauge?
Delivery is without a setting ring; a separate reference gauge is recommended for traceable zeroing and calibration checks.

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