20–30mm Three-Point Digital Internal Gauge, Two Heads, HM Measuring Faces, IP65, With Setting Ring And Extension - Metav IndustryLine

Take advantage of the combination of high-resolution 0.001 mm reading, carbide measuring faces and IP65 protection for reproducible bore checks in production and inspection. Benefit from the included setting ring and extension for fast calibration and flexible reach; order the M312.286.PN directly via Metav Werkzeuge or ask our consultants if needed.

M312.286.PN Digital three-point bore gauge — 20–30 mm range, IP65, carbide faces (Metav IndustryLine)

The M312.286.PN is a compact digital three-point internal measuring instrument designed for precise measurement of bores and blind holes in the 20–30 mm range, combining a digital display with two measuring heads for rapid, repeatable checks in machine shops and quality control environments.

• Digital display with dual measuring heads
• Carbide measuring faces for wear resistance
• IP65 protection against dust and water
• Resolution 0.001 mm, accuracy ±0.005 mm

Precise bore measurements with industrial-grade resolution

The instrument delivers a resolution of 0.001 mm together with a stated accuracy of 0.005 mm, which translates into highly reliable dimensional checks for small bores. The three-point measuring principle stabilises contact with the bore and reduces eccentricity errors, while the two measuring heads on the digital readout speed up repeated measurements. These characteristics make the gauge suitable for consistent quality control where dimensional tolerances are tight and measurement throughput matters.

Built to withstand workshop conditions and retain calibration

Robust construction and carbide measuring faces ensure long service life even under frequent use, while IP65 ingress protection guards the electronics against dust and splashing coolant. Compliance with DIN 863 provides a familiar standard framework for workshop use. Together, these features reduce maintenance intervals and preserve measurement reproducibility, making the device a dependable tool for production floors and inspection benches alike.

Ergonomics, calibration and data handling for efficient processes

The instrument’s digital display offers ON/PRESET, mm/inch switching and HOLD functions to simplify data capture; a standard RB 6 data output allows integration with reading systems or SPC workflows where required. The supplied setting ring (Ø 25 mm) and an extension improve calibration and access to recessed features, enabling faster set-up and fewer interruptions in routine inspection tasks. The combination of clear readout and practical accessories reduces cycle time per measurement.

Applications, compatibility and the added reassurance of Metav support

Designed for both through and blind-hole measurement, the gauge suits precision tasks in toolmaking, component inspection and small-bore production. The inclusion of hardened contact faces and a compact measuring depth of 90 mm facilitates checks in confined geometries. When combined with Metav’s logistics and product vetting, the instrument supports a dependable supply chain for workshops seeking consistent quality and traceability.

For dependable bore measurement solutions from Metav IndustryLine, contact Metav Werkzeuge to arrange supply of the M312.286.PN or to discuss suitability for specific applications — email info@metav-werkzeuge.com or call +49 2822 7131930

Technical Data

• Article number: M312.286.PN
• GTIN: 4054469179278
• Category: Micrometers

Facts

• Measuring range: 20–30 mm (20–25 + 25–30)
• Resolution: 0.001 mm
• Accuracy: 0.005 mm
• Measuring depth: 90 mm
• Weight: 1.8 kg
• Setting ring diameter: 25 mm
• Extension length: 150 mm
• Tariff number: 90173000

Special features

• IP65 protection
• Carbide measuring faces (HM)
• Digital display with ON/PRESET, mm/inch and HOLD functions
• Two measuring heads on the display
• Suitable for blind-hole measurement
• Includes setting ring and extension
• Conforms to DIN 863
• Data output: RB 6

FAQ

What measurement accuracy can be expected from this instrument?
The M312.286.PN achieves an accuracy of 0.005 mm with a display resolution of 0.001 mm, suitable for fine quality-control tasks and production checks.

Can the gauge measure blind holes and through holes?
Yes, the design is suitable for both blind-hole measurement and standard bore checks, with an effective measuring depth of 90 mm.

Is the device protected against workshop contaminants?
The unit is IP65-rated, offering protection against dust ingress and water jets, making it robust for industrial environments.

What accessories are supplied for calibration and extended reach?
The delivery includes a setting ring (Ø 25 mm) and an extension of 150 mm to assist calibration and measurement in recessed bores.

How can measurement data be exported for traceability or SPC?
The instrument provides an RB 6 data output for connection to compatible data-collection systems and process-control workflows.

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