3mm Ball Measuring Tip Ruby For Dial Test Indicators, 6mm Length - Käfer Messuhrenfabrik GmbH & Co. KG

With a ruby ball contact of Ø 3 mm and a compact 6 mm stem, this measuring insert provides consistently repeatable point contact for dial indicators, minimising wear and ensuring reliable readings. Order the part directly via Metav Werkzeuge or contact our consultants for fit and compatibility.

Käfer Measuring Insert – Ruby Ball Ø 3 mm, 6 mm Length for Dial Indicators

The Käfer Measuring Insert is a precision ruby-tipped ball insert designed as a contact point for dial indicators in fine metrology and workshop inspection.

• Ruby ball tip for wear resistance
• Precise 3 mm contact diameter
• 6 mm stem for compact indicators

Durable contact point for repeatable readings

A ruby contact ball offers outstanding wear resistance and dimensional stability under repeated use. The spherical contact geometry with Ø 3 mm ensures a defined point of contact that reduces indentation on measured surfaces and supports consistent measurement cycles. Where repeatability and minimal surface damage are priorities, the hard contact material extends service life and preserves calibration intervals. The M2.5 connection and compact form factor maintain a secure mechanical interface with standard indicator stems.

Compact design that fits tight setups

The short 6 mm length and ball-shaped tip make this contact ideal for installations where space is limited or lateral access is restricted. Its compact geometry suits a wide range of dial and test indicators used in workshop and inspection benches, enabling precise probing in fixtures, gauges and production control setups. The small contact diameter supports measurement of small features while the robust mounting thread provides secure seating in indicator stems.

Accuracy improvements that reduce rework and waste

Consistent contact behaviour from a hard, spherical tip leads to fewer measurement variations. This stability translates into clearer go/no-go decisions during quality control and a lower rate of corrective rework. Investing in a dedicated ruby contact head therefore supports higher process yield and reduces downstream costs associated with uncertain measurements — a practical benefit for both small workshops and industrial metrology departments.

Guidance for selection and integration

When replacing a contact tip, check thread compatibility and seating depth to maintain original indicator geometry. The M2.5 threaded mounting is common on fine dial indicators; the ruby ball contact is supplied as a measuring insert suitable for direct replacement where that thread is used. For further verification of fit or alternative tip shapes, Metav Werkzeuge can provide technical advice and assist with selecting the correct accessory for a specific indicator model.

Order the Käfer ruby measuring insert via Metav Werkzeuge for assured precision and talk to our specialists at info@metav-werkzeuge.com or +49 2822 7131930 for application guidance.

Technical data

• Article number: 4000851688NW
• SKU: 4000851688NW
• Designation: Measuring insert, ruby ball

Facts

• Ball diameter: 3 mm
• Length: 6 mm
• Thread: M2.5

Materials & applications

• Tip material: Ruby
• Shape: Ball contact
• Product type: Measuring insert
• Application: For dial indicators

FAQ

What materials is the contact ball made from?
The contact ball is made from ruby, chosen for hardness and wear resistance in measurement tasks.

Is the thread size compatible with common dial indicators?
Yes — the insert uses an M2.5 thread, which fits many fine dial and test indicator stems.

Can this insert be used on hardened surfaces without causing damage?
The ruby tip provides a hard, low-wear contact; it is suitable for repeated probing of harder materials while minimising surface indentation.

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