300mm SK40 Control Mandrel Ø40 Three-Point Runout Accuracy 0.002mm, Hardened Gauge Steel DIN ISO 7388-1 - Metav IndustryLine

Combine the 0.002 mm runout accuracy with hardened gauge steel and the standard SK40 taper to secure reproducible spindle alignment and efficient inspection cycles. Order the control mandrel directly via Metav Werkzeuge or consult our specialists for application advice.

Control mandrel SK40 (D40 × 300 mm) — precision runout gauge, 0.002 mm accuracy (Metav IndustryLine)

Control mandrel SK40 (D40 × 300 mm) designed for runout testing and alignment of machine spindles with SK receptacles, ideal for workshop and inspection use

• SK40 taper for standard spindle interfaces
• Runout accuracy 0.002 mm ensured
• Hardened gauge steel, HRC 58 for stability

Reproducible spindle alignment with factory-grade runout control

The control mandrel is built to deliver consistent spindle alignment results by combining a precisely machined taper with a stated 0.002 mm runout tolerance. Such specification translates into tangible benefits for production: fewer trial setups, quicker setup times and reduced scrap caused by misaligned spindles. The SK40 interface ensures compatibility with common toolholders and spindles, while the mandrel geometry supports repeatable seating and concentricity checks. This performance-focused design suits both maintenance tasks and quality-control routines.

Durable construction for long service life and measurement stability

Manufactured from hardened gauge steel and finished to HRC 58, the mandrel resists wear and preserves its measuring geometry under repeated handling. The choice of a stiff material and a compact D40 × 300 mm form reduces deflection during measurement, maintaining precision across many cycles. Conformity with DIN ISO 7388-1 provides an accepted reference for form and interfaces, simplifying inclusion into inspection protocols and documentation chains. Robust construction means fewer rechecks and a longer interval before refurbishment or replacement.

Measurable tolerance values and what they mean in practice

The declared runout 0.002 mm and cylindricity <0.003 mm indicate tight geometric control of the working diameter and shaft form. In practical terms, the runout figure specifies the maximum radial deviation observable when the mandrel is rotated in the spindle; the lower the number, the more reliable the concentricity verification. Cylindricity relates to the uniformity of the shaft over its length and is critical where long-workpiece alignment is required. These metrics allow traceable, comparable checks that support process control and decision-making in a production environment.

How the mandrel integrates into workshop routines

The mandrel suits use on the shop floor as part of a standardised inspection step: seat the taper, note runout on a dial or electronic indicator, and adjust the spindle or holder as required. Its D40 × 300 mm profile gives enough reach for many common spindle and holder arrangements while remaining manageable for single-operator handling. The weight and stiffness characteristics reduce handling errors and support stable indicator readings. Where documentation is required, the mandrel’s standard-compliant design eases reporting and auditability.

Contact Metav Werkzeuge for tailored technical guidance on integrating the Metav IndustryLine control mandrel into existing spindle testing procedures and to arrange procurement support directly from our Emmerich site

Technical data

• SKU: M318.974
• Type: SK40-D40-300L
• Label: Control mandrel SK 40, L = 300 mm, runout accuracy 0.002 mm
• GTIN: 4054469184715

Facts

• Dimensions: D40 × 300 mm
• Runout: 0.002 mm
• Cylindricity: <0.003 mm
• Hardness: HRC 58
• Weight: 8 kg

Special features

• Material: hardened gauge steel
• Standard: DIN ISO 7388-1
• Application: Runout testing and spindle alignment with SK receptacle
• Brand line: Metav IndustryLine

FAQ

What accuracy can be expected when using this mandrel?
The mandrel offers a runout accuracy of 0.002 mm, which permits precise concentricity checks and reliable spindle alignment when used with appropriate indicators.

Is the mandrel compatible with standard toolholders?
Yes, the SK40 taper matches common SK receptacles, making the mandrel suitable for routine checks of machine spindles and SK-mounted holders.

What material and hardness are specified for durability?
Constructed from hardened gauge steel with a hardness of HRC 58, the mandrel is designed for long-term dimensional stability under frequent use.

Which standards govern the mandrel’s form and interface?
The design complies with DIN ISO 7388-1, ensuring recognised interface geometry and simplifying documentation within quality systems.

How does cylindricity affect measurement results?
A cylindricity of <0.003 mm indicates uniform shaft form over the working length, which contributes to consistent indicator readings and minimises uncertainty in alignment tasks.

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