14mm Boring Bar STI For IR/ER Indexable Inserts 12mm Shank 125mm Overall Length - Teknik Makina

Precision and stability come together in a compact design: the STI boring bar K350TM offers a Ø14 mm head with a shank Ø12 mm and 125 mm overall length, delivering repeatable internal turning performance for indexable insert operations. The secure IR11 clamping and right-hand cut ensure reliable chip control and minimal vibration. Order the STI boring bar K350TM directly via Metav Werkzeuge or ask our consultants if needed.

K350TM STI Boring Bar by Teknik Makina — Ø14 mm, right-hand

K350TM STI Boring Bar is a right-hand indexable insert holder engineered for internal turning with IR/ER indexable inserts, suited to lathe and turning centre applications.

• Right-hand cutting for conventional set-ups
• Fits 11 IR indexable inserts
• Shank Ø12 mm for secure clamping
• 125 mm overall length for extended reach

Consistent internal turning accuracy for batch production

The STI boring bar is designed to provide stable cutting and repeatable geometry in internal turning tasks. Its compact head diameter of Ø14 mm reduces runout and vibration, which results in improved surface finish and tighter tolerance retention. The combination of a reduced head profile and a robust shank Ø12 mm creates a stiff tool assembly that, when mounted in a suitable holder, gives predictable tool life and reduced rework. For operators and production engineers, this translates into fewer setup adjustments and a steadier process window during serial machining.

Fast changeover and insert compatibility for efficient workflows

Configured for 11 IR indexable inserts and labelled as STI for IR/ER indexable inserts, the toolholder supports quick insert indexing and replacement, lowering downtime between operations. An IR11 clamping designation ensures compatibility with established clamping systems, while the ISO reference S12K STIR clarifies the holder geometry for integration into existing tool libraries. The use of indexable inserts keeps tooling costs manageable: only the cutting tip is replaced when worn, rather than the entire tool, improving cost efficiency and spare-part logistics in production environments.

Designed for secure clamping and improved chip control

Right-hand cutting orientation and the specified clamping interface deliver reliable seating and repeatable axial position. The IR11 clamping holder interface is intended to secure the insert firmly, lowering the risk of displacement under load. With a 125 mm overall length, the tool achieves necessary reach into bores while preserving rigidity; this balance of reach and stiffness reduces chatter and supports consistent chip evacuation. Engineers will appreciate the predictable behaviour under varied cutting parameters, which simplifies process qualification and parameter optimisation.

Practical advantages supported by Metav’s supply and expertise

Sourced through Metav’s distribution, the tool benefits from a supply chain positioned as a European quality filter: central stock in Emmerich and specialist advice tailored to workshop requirements. The design of the holder, combining the STI geometry with a compact Ø14 mm head, addresses common internal turning challenges such as access, visibility and cooling. Where process integration is required, technical data and fitting advice can be provided, enabling efficient selection of inserts and clamping accessories to match spindle speeds and feed rates.

For precise internal turning tasks, request a technical consultation or place an order for the K350TM STI boring bar via Metav Werkzeuge — call +49 2822 7131930 or email info@metav-werkzeuge.com for expert assistance and rapid delivery

Technical Data

• SKU: K350TM
• Manufacturer: Teknik Makina
• Article designation: STI for IR/ER indexable inserts (boring bar)
• ISO designation: S12K STIR

Core data

• Diameter: 14 mm
• Shank diameter: 12 mm
• Cutting height: 25 mm
• Overall length: 125 mm
• Weight: 0.117 kg

Special features

• For indexable inserts: 11 IR
• Cutting direction: Right-hand
• Clamping holder designation: IR11
• ECLASS: 21180806
• Files: 2 attachments available

FAQ

Which insert types are compatible with this boring bar?
The K350TM accepts 11 IR indexable inserts and is designated STI for IR/ER indexable inserts, meaning it is compatible with IR and ER style inserts that match the IR11 clamping geometry.

What is the ISO designation and why does it matter?
The holder carries the ISO designation S12K STIR, which identifies the shank and head geometry; this helps to ensure the correct selection of holder pockets and tool presetting in the tool room.

How is the insert secured in the holder?
Clamping is provided via the IR11 interface; the insert is located and clamped by the holder seat and fastener, ensuring repeatable seating and robust resistance to cutting forces.

Is the tool suitable for extended internal reach applications?
With an overall length of 125 mm the bar offers increased reach while retaining a shank Ø12 mm that contributes to rigidity, making it suitable for many internal turning tasks where access is required.

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