62–75 mm Digital Three-Point Internal Micrometer Carbide Faces, RB6, No Setting Ring, No Extension - Metav IndustryLine

Take advantage of precise bore measurement, carbide wear resistance and a clear digital readout for reproducible inspection results; order the instrument directly via Metav Werkzeuge or consult our specialists for application advice.

Digital three-point internal micrometer M312.220 – 62–75 mm, carbide measuring faces | Metav IndustryLine

The Digital three-point internal micrometer M312.220 is a specialist instrument for high‑precision internal diameter measurement, designed for blind‑hole and general bore inspection in production and quality control environments.

Digital readout with mm/inch and HOLD function
Measurement range 62–75 mm
Carbide measuring faces for wear resistance
High accuracy 0.005 mm

Consistent precision for inspection and process control

The M312.220 three‑point gauge combines a stable three‑contact measuring principle with a measurement range of 62–75 mm to deliver repeatable results on cylindrical bores. The three‑point design centres automatically in the bore, reducing concentricity errors common with two‑point methods and ensuring reliable results on blind‑hole applications. With an accuracy of 0.005 mm and a display resolution of 0.001 mm, the instrument suits fine inspection tasks where process capability and traceable repeatability are required. These specifications translate into fewer reworks and more predictable production yields—an immediate benefit for small‑batch and series production alike.

Faster readings and clear digital control to speed inspection cycles

A clear digital readout with mm/inch, HOLD and SET functions simplifies routine measuring and reduces interpretation errors. The mm/inch toggle supports mixed workflows and international documentation, while the HOLD feature permits transfer of the reading from confined inspection points to documentation stations without loss of data. The unit is fitted with an RB 6 data interface for standardised instrument mount or output configurations, enabling straightforward integration into common inspection stands. These functional elements reduce handling time per measurement and support a lean inspection routine, improving throughput in busy metrology benches.

Robust construction for workshop environments and long service life

Crafted with carbide (HM) measuring faces, this internal gauge resists wear when used on ferrous and non‑ferrous bores, maintaining measurement quality over extended use. The instrument is supplied without a setting ring or extension, which keeps the design compact and focused on direct bore checking; this makes it suitable for in‑machine or bench inspection where space is limited. At a system weight of approximately 3.3 kg, the gauge strikes a balance between stability and manoeuvrability. The rugged contact surfaces and digital electronics are targeted at shop‑floor conditions, so operators gain confidence in sustained accuracy and lower lifetime maintenance demands.

For reliable bore measurement in serial production, choose the Metav IndustryLine M312.220 and contact Metav Werkzeuge for tailored advice and immediate availability: info@metav-werkzeuge.com or +49 2822 7131930

Technical Data

• Article number: M312.220
• GTIN: 4054469169170
• ECLASS: 21170335
• ETIM: EC003590
• Category: Messschrauben / Micrometers

Facts

• Measuring range: 62–75 mm
• Resolution: 0.001 mm
• Accuracy: 0.005 mm
• Weight: 3.3 kg
• Tariff number: 90173000

Special features

• Digital display with ON/OFF/SET, HOLD, mm/inch
• Carbide (HM) measuring faces
• Suitable for blind‑hole bores
• Supplied without setting ring and without extension
• Data interface: RB 6

FAQ

How accurate is the instrument for internal bore inspection?
The M312.220 delivers an accuracy of 0.005 mm with a display resolution of 0.001 mm, making it suitable for precise workshop and inspection tasks where tight tolerances are required.

Can this gauge measure blind holes?
Yes, the instrument is designed for blind‑hole applications and features the appropriate measuring geometry for reliable centring and contact within such bores.

What protective or wear‑resistant features does it have?
The measuring faces are made of carbide (HM), providing superior wear resistance on a variety of materials and ensuring stable results over extended use.

Which display functions simplify measurement transfer and recording?
The digital readout offers mm/inch switching, a HOLD function to retain readings, and a SET function for zeroing—useful when documenting measurements away from the measurement point.

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