150 mm Extension for Three-Point Internal Measuring Spindle Ø12 mm, M8 Thread - Metav IndustryLine

Take advantage of the combination of a 150 mm extension length, a Ø12 mm shank and an M8 mounting thread to extend three‑point internal micrometers for deeper bore measurement while maintaining stability and repeatability; order directly via Metav Werkzeuge or consult our product specialists for application advice.

Extension for three‑point internal micrometer M312.104 — 150 mm, Ø12 mm (Metav IndustryLine)

The Extension for three‑point internal micrometer M312.104 adapts three‑point internal micrometers for reliable deep‑bore measurements in workshop metrology and inspection processes.

• 150 mm extension length
• Ø12 mm shank for stable centring
• M8 thread for secure attachment
• Compatible with 12–16 and 16–20 mm ranges

Extend reach while keeping measuring stability

A purpose‑designed 150 mm extension increases the accessible measuring depth without compromising the instrument’s lateral stability. The Ø12 mm shank offers a compact, stiff profile that reduces deflection in longer setups, preserving the original instrument’s repeatability and allowing consistent readings when accessing recessed bores or stepped housings. This makes the extension suitable for production checks and maintenance tasks where deeper internal dimensions must be verified reliably.

Secure mounting and repeatable results

The integrated M8 thread provides a mechanically robust connection to three‑point internal micrometers and retains the original seating geometry. A secure mechanical interface minimises micro‑movement during measurement cycles, supporting repeatable results in series inspection. For process‑led workshops, the ability to maintain alignment through a positive threaded connection reduces measurement scatter and supports efficient quality control workflows.

Practical compatibility for workshop use

Designed for the common internal ranges 12–16 mm and 16–20 mm, the accessory pairs with three‑point measuring heads to extend their functional reach. The component’s compact footprint eases handling and storage, while the straightforward installation keeps cycle times low. Where deeper bores or assemblies need quick verification, this extension provides a pragmatic balance between added reach and preserved measurement integrity.

Contact Metav Werkzeuge for specification matching and supply of the Metav IndustryLine extension M312.104 — our Emmerich team can advise on fitment and dispatch: info@metav-werkzeuge.com / +49 2822 7131930

Technical Data

• Article number: M312.104
• GTIN: 4054469119359
• TARIC / HTS: 90173000

Facts

• Extension length: 150 mm
• Shank diameter: Ø12 mm
• Weight: 1.3 kg
• Thread: M8
• ECLASS: 21019104
• ETIM: EC002219

Special features

• Suitable for three‑point internal micrometers
• Compatible measuring ranges: 12–16 mm, 16–20 mm
• Extension geometry: 150 x Ø11.7 (manufacturing dimension)
• Category: Zubehör (accessory)

FAQ

How does this extension affect measurement repeatability?
The extension is designed to preserve the measuring head’s alignment; when mounted via the M8 thread the component helps maintain repeatable readings by reducing lateral play and deflection during deeper bore measurements.

Which internal micrometer ranges is the accessory compatible with?
The extension is compatible with three‑point internal micrometer ranges of 12–16 mm and 16–20 mm, allowing the respective measuring heads to reach recessed bores up to the added 150 mm depth.

Is the mounting thread standardised?
Yes, the accessory uses an M8 threaded interface for secure and standard mechanical attachment to compatible three‑point internal micrometers.

What is the effective shank diameter and why does it matter?
The shank is specified around Ø12 mm, providing a stiff, compact profile that reduces bending and helps maintain measurement stability over the extended length.

Can the extension be used in production inspection cycles?
The component is suited to workshop and production metrology where deeper internal dimensions must be checked; its secure mounting and compact shank support repeatable use in inspection routines.

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