100-125mm Three-Point Internal Micrometer Matt Chrome Scale And Vernier, Ratchet, Case - Metav IndustryLine

Take advantage of precise internal measurement across the 100–125 mm range combined with a 0.005 mm vernier resolution and a ratchet stop for consistent measuring force. Order the instrument directly via Metav Werkzeuge or consult our advisors for application guidance.

Three-point internal micrometer M312.146 — 100–125 mm range, ratchet stop (Metav IndustryLine)

The three-point internal micrometer M312.146 is a workshop-grade inside-measuring instrument for accurate bore and recess measurement within the 100–125 mm span, suitable for routine inspection and machine-shop use

• 100–125 mm measuring range
• Ratchet stop for constant measuring force
• Hardened measuring faces for durability
• Vernier scale, 0.005 mm resolution

High-accuracy readings for repeatable inspection

The three-point internal micrometer is engineered to deliver repeatable, high-accuracy measurements where component fit is critical. The integrated vernier scale (0.005 mm) enables fine interpolation beyond the main scale, while the instrument's stated accuracy of 0.006 mm provides a verifiable tolerance for quality control. This precision reduces rework and inspection uncertainty by offering a clear, analogue readout for operators familiar with vernier reading. Classified in the Standard (100–300 mm) group, the micrometer strikes a practical balance between reach and rigidity suitable for general machine‑shop tasks.

Robust mechanics for consistent contact and longevity

Designed for everyday use in demanding environments, the instrument features hardened measuring faces, ensuring wear resistance at the contact points and maintaining measurement integrity over time. The ratchet stop enforces a uniform measuring force, reducing operator-induced variation and improving reproducibility on serial checks. A measuring depth of 140 mm allows access to deeper bores and shoulders, and the robust construction supports stable three‑point contact that centres on circular bores for reliable diameter assessment.

Practical handling and workshop application

As an analogue, three‑point internal measuring tool, the micrometer combines straightforward operation with workshop durability. The matt‑chrome scale and vernier are finished for reduced glare and clear legibility. The instrument is supplied without an adjustment ring, so setting procedures should be planned into the initial inspection routine. Its design suits fitters, inspection technicians and maintenance engineers who require a dependable mechanical solution for inside-diameter checks without the need for electronic data output.

For precision inside measurements choose the Metav IndustryLine three-point internal micrometer and contact Metav Werkzeuge for tailored advice and order placement via info@metav-werkzeuge.com or phone +49 2822 7131930

Technical data

• Article number: M312.146
• GTIN: 4054469119526
• EClass: 21170335
• ETIM: EC003590

Facts

• Measuring range: 100–125 mm
• Measuring depth: 140 mm
• Resolution (vernier): 0.005 mm
• Stated accuracy: 0.006 mm
• Weight: 2.9 kg

Special features

• Three-point internal measurement
• Scale and vernier matt chrome plated
• Hardened measuring faces
• Analogue instrument with ratchet stop
• Delivery without setting ring

FAQ

What measuring range does the three-point internal micrometer cover?
The three-point internal micrometer M312.146 covers a measuring range of 100–125 mm, suitable for standard workshop bores.

What resolution and accuracy can be expected from this instrument?
The M312.146 offers a vernier resolution of 0.005 mm with a stated accuracy of 0.006 mm, providing fine interpolation for inspection tasks.

Is the instrument digital or analogue?
The three-point internal micrometer M312.146 is an analogue instrument with a vernier scale and a ratchet stop for consistent measuring force.

Is a setting ring included with the delivery?
Delivery for the M312.146 is without a setting ring, so users should arrange a reference gauge if serial calibration or zero checks are required.

What measuring depth and handling features does the micrometer provide?
The M312.146 has a measuring depth of 140 mm and a ratchet stop to ensure uniform pressure; the three‑point contact design centres reliably in bores for reproducible diameter readings.

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