Ø40x300 Runout Test Mandrel BT40 Three-Point Runout ≤0.003mm, Hardened Gauge Steel JIS 6339/DIN ISO 7388-2 - Metav IndustryLine

Efficient spindle alignment, ensured by a runout accuracy of <0.003 mm and a hardened gauge steel body, reduces rework and protects tool life; the rugged BT40 taper and workshop-compatible form factor support repeatable measurements in production environments. Order the mandrel directly via Metav Werkzeuge or consult our specialists for application advice.

Test mandrel BT40-300 — Runout accuracy <0.003 mm, hardened gauge steel (Metav IndustryLine)

The Test mandrel BT40-300 is a hardened gauge steel mandrel designed for precise runout testing and alignment of BT40 spindles in machine tools, offering workshop-ready repeatability and conformity to recognised toolholder standards.

• Runout accuracy <0.003 mm
• Hardened gauge steel construction
• Conforms to JIS 6339 / DIN ISO 7388-2
• For BT40 spindle alignment and testing

Precision that protects spindle performance and tool life

A runout tolerance below 0.003 mm delivers measurable benefits in machining quality and process stability. By keeping spindle eccentricity to a minimum, the mandrel reduces vibration, lowers tool wear and helps maintain dimensional tolerances on machined parts. The exceptional concentricity supports faster setup decisions and reliable inspection outcomes, which translates into fewer rejects and more predictable cycle times in production.

Robust construction for long-term repeatability

Manufactured from hardened gauge steel and hardened to HRC 58, the design provides the stiffness and wear resistance required for repeated use in workshop environments. The solid construction preserves geometry under handling and clamping forces, ensuring that alignment checks remain consistent over time. The substantial mass and profile also aid in stable seating within BT40 tapers, supporting reproducible measurement routines.

Standards-based compatibility for seamless workflow integration

Compliant with JIS 6339 / DIN ISO 7388-2, the mandrel fits established BT40 toolholder interfaces and can be incorporated directly into existing machine maintenance and quality-assurance procedures. The tool’s form factor is tailored for runout testing and alignment tasks, enabling technicians to validate spindle condition quickly and to document machine status as part of routine inspection plans.

Practical handling and measurable efficiency gains

With a balanced design optimised for workshop use, the mandrel simplifies centring and alignment checks without elaborate fixtures. The visible, mechanical certainty of a precision mandrel shortens diagnostic times and supports preventive maintenance strategies, helping to avoid costly downtime. For bespoke measurement sequences or integration into inspection logs, the tool’s repeatability makes it a dependable reference artefact in the metrology toolbox.

For reliable spindle alignment choose the Metav IndustryLine mandrel and contact Metav Werkzeuge for tailored technical advice and ordering assistance.

Technical Data

• Article number: M318.944
• GTIN: 4054469183985
• Type: BT40-300
• Designation: Test mandrel BT40-300, runout accuracy <0.003 mm

Facts

• Weight: 4 kg
• Diameter x length: Ø40 x 300 mm
• Hardness: HRC 58
• Runout accuracy: <0.003 mm

Materials / Special features

• Material: hardened gauge steel
• Standards: JIS 6339 / DIN ISO 7388-2
• Application: Runout testing and alignment of BT40 spindles
• Category: Gauges

FAQ

What level of concentricity can be expected with this mandrel?
The Test mandrel BT40-300 provides a runout accuracy of <0.003 mm, making it suitable as a reference for high-precision spindle checks and alignment tasks.

Which materials and hardening are used in the tool's construction?
The mandrel is made from hardened gauge steel and has a hardness rating of HRC 58, ensuring durability and stable geometry during repeated measurements.

Is the mandrel compatible with standard BT40 toolholders?
Yes; the BT40-300 form follows recognised dimensions and the mandrel is designed specifically for runout testing and aligning BT40 spindles in accordance with the cited standards.

How heavy is the mandrel and does weight affect handling?
At 4 kg the mandrel offers stable seating in the spindle; the mass contributes to repeatable positioning while remaining manageable for standard workshop handling procedures.

Can this mandrel be used for routine machine acceptance and maintenance checks?
Absolutely — the mandrel’s precision and standards-based design make it a practical reference for periodic spindle inspections and preventive maintenance programmes.

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