Ø30x250 BT30 Runout Test Mandrel 0.003mm Accuracy, Hardened Gauge Steel, JIS 6339/DIN ISO 7388-2 - Metav IndustryLine

Take advantage of the combination of high runout accuracy, hardened gauge steel and straightforward workshop integration to speed up spindle checks and protect cutting tools. Order the mandrel directly via Metav Werkzeuge or ask Metav's consultants for application advice.

Test mandrel BT30-250 — Runout accuracy ≤ 0.003 mm, hardened gauge steel (Metav IndustryLine)

The Test mandrel BT30-250 is a precision gauge for runout testing and alignment of BT30 spindles, designed for quick verification in workshop and maintenance routines.

• BT30 taper for spindle alignment
• Runout ≤ 0.003 mm for precision checks
• Hardened gauge steel HRC 58
• Compact Ø30×250 mm profile

Reduce machine downtime with precise spindle checks

A tight runout specification is essential for consistent machining quality. The runout ≤ 0.003 mm specification ensures that checks are meaningful for high-precision applications, reducing the risk of premature tool wear and rejected parts. By using a dedicated mandrel for verification, technicians obtain a reproducible reference that makes alignment deviations immediately visible on dial indicators or measuring probes. This predictable performance shortens diagnostic time and supports a measured approach to spindle maintenance, which translates into fewer production interruptions and more reliable cycle times.

Durable construction for repeatable measurements

Built from hardened gauge steel and tempered to HRC 58, the mandrel withstands repeated handling without rapid wear, preserving the measuring surface and taper geometry over time. Conformance to JIS 6339 / DIN ISO 7388-2 provides a recognised basis for dimensional stability and taper accuracy, so the mandrel serves as a trustworthy reference in quality control processes. The robust material and standardised design mean that the gauge maintains its function under workshop conditions while offering the necessary stiffness to avoid deformation during mounting.

Simple integration into inspection workflows

With a compact profile of Ø30 × 250 mm and a weight of 3 kg, the mandrel is straightforward to mount in a BT30 spindle and to handle on the bench. Its geometry is optimised for quick insertion and repeatable seating, enabling efficient comparative checks with dial gauges or machine probes. The device is particularly suitable for routine spindle runout inspections, pre-shift checks and setup verification after tool changes. Using a dedicated reference axis aids traceability in inspection logs and supports consistent process control in both small workshops and larger production settings.

For reliable spindle alignment and regular runout verification, request the BT30-250 mandrel from Metav Werkzeuge — Metav's experts in precision metrology are available to advise on suitability and delivery from Emmerich.

Technical data

• Article name: Prüfdorn BT30-250 Rundlaufgenauigkeit 0,003mm
• SKU: M318.943
• GTIN: 4054469183978

Numbers / Core technical data

• Dimensions: Ø30×250 mm
• Weight: 3 kg
• Runout / cylindricity: < 0.003 mm
• Hardness: HRC 58

Designs / Special features

• Material: hardened gauge steel
• Standard: JIS 6339 / DIN ISO 7388-2
• Suitable for runout testing and aligning machine spindles with BT30 taper
• eClass: 21022304

FAQ

What runout tolerance does the mandrel deliver?
The runout/cylindricity is specified as < 0.003 mm for the Test mandrel BT30-250 (SKU M318.943), suitable for high-precision spindle checks.

Is the mandrel compatible with BT30 spindles only?
The mandrel is designed for BT30 taper seats and is intended specifically for spindle alignment and runout testing on machines that accept BT30 tooling.

What material and hardness are used for the gauge?
The gauge is made from hardened gauge steel with a hardness of HRC 58, providing wear resistance and dimensional stability during repeated use.

Which standards apply to this testing mandrel?
The mandrel conforms to JIS 6339 and DIN ISO 7388-2, which address taper and gauge design for repeatable mounting and measurement.

How is the mandrel best used in workshop inspection routines?
Mount the mandrel in the spindle, bring a dial indicator or probe into contact at the reference diameter, and rotate the spindle slowly to read runout; this provides a fast, reproducible check for alignment and spindle condition.

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