225-250mm Three-Point Internal Micrometer Digital With 0.001mm Resolution, Calibrated, Supplied In Case - Metav IndustryLine

Take advantage of precise internal measurement and reliable data transfer: the three-point contact and digital readout with 0.001 mm resolution deliver repeatable results across a 225–250 mm measuring range, while hardened measuring faces and a protective case ensure durability in daily workshop use. Order the instrument directly via Metav Werkzeuge or consult our specialists for application support.

Three-point internal micrometer M312.261 — Digital instrument with 0.001 mm resolution

The Three-point internal micrometer M312.261 is a digital measuring instrument designed for accurate internal diameter measurement in machine shops, inspection benches and production control for medium-sized components.

• Digital display, 0.001 mm resolution
• 225–250 mm measuring range
• Hardened measuring faces for durability
• Data output RB 4 for process integration

Deliver consistent internal measurements with three-point contact

The three-point contact mechanism provides stable, centred contact with the bore, reducing eccentricity and operator-induced variation; this design improves repeatability and shortens inspection times. The integrated digital readout offers a 0.001 mm resolution, enabling fine judgement of tolerances while maintaining a practical accuracy of ±0.008 mm, which suits standard quality-control routines. The combination of fine resolution and robust repeatability supports faster decision-making on the production line and reduces scrap rates through reliable pass/fail assessment.

Built for workshop use: robust faces and practical handling

Constructed for routine industrial use, the instrument features hardened measuring faces, which resist wear and sustain measurement integrity over time. The measuring depth of 140 mm allows access to deeper bores and stepped geometries without loss of stability. Classified in the standard range (100–300 mm), this solution balances reach and stiffness for general workshop and metalworking tasks. Supplied in a protective case, the unit is ready for storage and transport, while the delivery explicitly excludes a setting ring — plan for a separate gauge ring if traceable master-setting is required.

Integration-ready readout and controls for efficient workflows

The digital electronics provide common functions (ON/0-, mm/inch, ABS, PRESET and HOLD) for flexible measurement routines and clear data capture. With the RB 4 data output, measured values can be fed directly into SPC systems or data loggers to streamline documentation and reduce transcription errors. This connectivity supports traceable measurement chains and faster feedback into manufacturing control loops. The instrument’s solid construction and clear controls make it suitable for both bench inspection and production-line sampling, helping to maintain consistent quality across batches.

Contact Metav Werkzeuge for tailored advice on the Metav IndustryLine three-point internal micrometer M312.261 and for assistance with integration into existing measurement systems; delivery is arranged from our Emmerich warehouse.

Technical Data

• Article number: M312.261
• GTIN: 4054469120034
• Manufacturer: Metav IndustryLine
• Data output: RB 4

Core specifications

• Measuring range: 225–250 mm
• Measurement depth: 140 mm
• Resolution: 0.001 mm
• Accuracy: ±0.008 mm
• Weight: 4.8 kg

Features

• Digital display with ON/0-, mm/inch, ABS, PRESET, HOLD
• Hardened measuring faces
• Supplied in protective case
• Delivered without setting ring
• Classified as standard range instrument (100–300 mm)
• Suitable for workshop and quality-control applications

FAQ

How precise is the measurement with this instrument?
The instrument provides a resolution of 0.001 mm and an accuracy of ±0.008 mm, making the M312.261 suitable for standard workshop quality-control tasks.

Can measurement data be exported to a computer or SPC system?
Yes, the M312.261 includes an RB 4 data output that enables direct transfer of measurement values into data collection systems for process integration.

Is a setting ring or calibration standard supplied with the micrometer?
The delivery of the M312.261 is without a setting ring; a traceable gauge ring should be obtained separately for master-setting procedures.

What protection and handling support is provided during transport?
The micrometer is supplied in a protective case to simplify transport and storage and to protect the hardened measuring faces from damage.

Which bore sizes and depths are suitable for this instrument?
With a measuring range of 225–250 mm and a measurement depth of 140 mm, the unit is intended for medium-sized internal diameters and deeper bores commonly found in mechanical components.

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