Ø50x300 BT50 Runout Gauge 0.003mm Accuracy, Hardened Gauge Steel, JIS 6339/DIN ISO 7388-2 - Metav IndustryLine

Take advantage of the combination of extremely low runout tolerance and hardened construction for dependable spindle alignment in production and set-up. The BT50-300 test mandrel delivers <0.003 mm runout accuracy and a robust Ø50×300 mm form, ensuring repeatable measurements and reduced rework. Order the test mandrel directly via Metav Werkzeuge or ask our consultants for application advice.

Test mandrel BT50-300 – BT50 runout test mandrel, <0.003 mm accuracy (Metav IndustryLine)

A precision test mandrel, Test mandrel BT50-300, designed for runout inspection and alignment of BT50 spindle interfaces in machine-tool set-up and maintenance.

• Runout accuracy <0.003 mm
• BT50 interface, Ø50×300 mm
• Hardened gauge steel, HRC 58

Assured spindle accuracy for reliable set-up

The primary advantage of this mandrel is its runout accuracy <0.003 mm, which translates into measurable improvements during spindle alignment and concentricity checks. For machine shops and maintenance teams, this level of precision reduces the need for repeated adjustments and lowers scrap rates by ensuring that the spindle axis is within tight tolerances before production begins. The specified tolerance is suitable for demanding set-ups where high concentricity is essential for subsequent machining operations.

Robust construction that supports repeatable measurements

Manufactured from hardened gauge steel and specified at HRC 58, the mandrel resists wear and surface deformation during repeated use. The solid construction and the Ø50×300 mm geometry provide a stable bearing length for accurate measurement transfer, while the BT50 shank ensures secure seating in BT taper spindles. The substantial mass (approx. 5 kg) aids stability during static checks and helps minimise vibration-induced error, delivering consistent results across multiple measuring cycles.

Designed for practical workshop integration and standards compliance

This test mandrel conforms to recognised taper standards (JIS 6339 / DIN ISO 7388-2), which simplifies its integration into existing calibration and alignment procedures. The item is intended specifically for runout testing and alignment of BT spindles, enabling technicians to verify spindle condition without complex fixturing. Clear, repeatable handling and straightforward mounting reduce set-up time, while the mandrel’s geometry supports common measuring devices and dial indicators used in routine maintenance.

For precise spindle alignment and dependable runout control, contact Metav Werkzeuge to arrange supply of the BT50-300 test mandrel and discuss delivery options from our Emmerich facility.

Technical data

• Article number: M318.945
• Type: BT50-300
• Dimensions: Ø50×300 mm
• Weight: 5 kg
• Material: hardened gauge steel
• Hardness: HRC 58

Facts

• Runout accuracy: <0.003 mm
• Diameter: Ø50 mm
• Length: 300 mm
• Interface: BT50
• Standard: JIS 6339 / DIN ISO 7388-2

Special features

• Suitable for runout testing and spindle alignment with BT interface
• Robust, wear-resistant hardened gauge steel
• Designed for repeatable measurements in workshop environments

FAQ

What runout tolerance does the mandrel achieve?
The BT50-300 test mandrel achieves a runout accuracy of less than 0.003 mm, making it suitable for precise spindle concentricity checks.

Which spindle taper is the mandrel compatible with?
The mandrel is made for BT50 taper spindles; the BT50 interface ensures correct seating and alignment during measurement.

What material and hardness are specified for the mandrel?
The mandrel is produced from hardened gauge steel with a hardness of HRC 58 for long-term wear resistance and dimensional stability.

How does the mandrel help reduce set-up time?
By providing a stable Ø50×300 mm reference and tight runout tolerance, the mandrel enables faster, repeatable alignment checks and reduces the need for iterative adjustments.

Is the mandrel suitable for regular maintenance inspections?
Yes, the BT50-300 is designed for routine runout testing and spindle alignment in workshop and maintenance contexts, supporting consistent quality control.

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