250mm Extension For Screw-In Milling Cutter Shaft Ø25mm, M12 Thread - Teknik Makina

Take advantage of the 250 mm overall length, 25 mm shaft stiffness and secure M12 thread to extend screw-in milling cutters for deep or hard-to-reach cuts; this combination supports stable machining and fewer setup changes. Order the VT518TM directly via Metav Werkzeuge or consult our specialists for matching to specific applications.

Extension for Screw-in Milling Cutters VT518TM — 250 mm overall length, 25 mm shaft (Teknik Makina)

The Extension for Screw-in Milling Cutters offers a rigid, long-reach adapter intended for use with screw-in milling cutters in CNC machining centres and workshop milling machines, enabling access to recessed features and deeper pockets while maintaining a controlled connection to the cutting tool.

• 250 mm overall length for extended reach
• 25 mm shaft for high stiffness
• M12 thread for secure screw-in mounting
• 1.17 kg balanced mass for stable operation

Greater reach with predictable machining outcomes

The long adapter delivers a 250 mm overall length that extends the effective working envelope of screw-in cutters, reducing the need for additional part re-clamping or multiple setups. With a 25 mm shaft the extension preserves axial rigidity relative to smaller-diameter options, which helps to control deflection during interrupted cuts. The result is fewer programme changes and a smoother production flow when machining deep pockets or stepped components on CNC machines.

Secure seating for improved concentricity and surface quality

A reliable mechanical connection is the basis for reproducible results. The VT518TM uses an M12 thread and an internal seating arrangement with a 40 mm cone and a 20.7 mm opening, providing a firmly located interface between extension and cutter. This geometry reduces runout, which in turn improves surface finish and extends cutter life; in practice, correct seating and clean contact faces are decisive for minimising radial deviation during high-speed rotation.

Stable dynamics and workshop durability

Weighing 1.17 kg, the extension contributes mass that influences the tool system’s dynamic behaviour. That balanced mass can attenuate minor vibrations and support stable operation across a range of spindle speeds, provided the machine’s toolholding and feeds are matched accordingly. The robust dimensions favour consistent repeatability in series production, helping to keep rejects low and process times predictable.

Integration into efficient supply and service workflows

Sourcing the VT518TM through Metav Werkzeuge brings practical benefits for industrial and trade customers: local stock management in Emmerich, an extensive product range to reduce supplier numbers, and decades of precision expertise that support reliable procurement decisions. This combination of technical fit and dependable supply ensures workshop requirements are met with minimal administrative overhead.

For tailored technical matching and prompt supply from Metav Werkzeuge, request personalised advice from our Emmerich team at info@metav-werkzeuge.com or call +49 2822 7131930 to discuss the VT518TM and its suitability for specific machining tasks.

Technical Data

• SKU: VT518TM
• Manufacturer: Teknik Makina

Facts

• Overall length: 250 mm
• Shaft diameter: 25 mm
• Shaft opening: 20.7 mm
• Cone length (seating): 40 mm
• Thread: M12
• Weight: 1.17 kg

Special features

• Extension for screw-in milling cutters
• Secure screw-in mounting
• Designed for extended-reach milling applications

FAQ

What sizes and interfaces does the extension use?
The VT518TM from Teknik Makina features a 25 mm shaft, a 20.7 mm opening and an M12 thread, providing the defined mechanical interface for compatible screw-in milling cutters.

How does the 250 mm length affect rigidity?
With an overall length of 250 mm, the extension increases overhang; however, the larger shaft diameter helps to maintain stiffness, so deflection is reduced compared with thinner extensions in similar conditions.

Is the VT518TM suitable for CNC machining centres?
Yes. The extension is intended for use in CNC machining centres and workshop mills where screw-in cutters are employed and longer reach is required.

How does the seating geometry influence runout?
The 40 mm cone seating and defined opening support precise axial location, which reduces radial runout and contributes to improved surface finish and cutter life when correctly mounted.

What should be considered regarding mass and dynamics?
At 1.17 kg, the extension adds rotating mass that alters the tool system dynamics; spindle speed and feed should be selected with the toolholder and workpiece rigidity in mind to avoid chatter.

Manufacturer: Teknik Cutting Tools, Buyukkayacık OSB Mah.422 Nolu Sokak.No:9, Selcuklu/KONYA/TURKEY / Responsible: Metav Werkzeuge GmbH; Parkring 45; 46446 Emmerich; Germany; +49 2822 7131930; eMail: info@metav-werkzeuge.com