29mm S25R STIL Drill Bar STI for IR/ER Indexable Inserts Left 40mm Cutting Height, 200mm Overall Length - Teknik Makina

Take advantage of precise internal turning with a left-hand STI toolholder that pairs compact rigidity with universal ER16 clamping; its 25 mm shank and 200 mm overall length deliver stable performance across series machining. Order directly via Metav Werkzeuge or consult the team for specification matching.

STI for IR/ER Indexable Inserts boring bar — S25R STIL by Teknik Cutting Tools, left-hand, ER16

The STI for IR/ER Indexable Inserts boring bar is designed for internal turning with ER16 clamping and left-hand cutting orientation, suitable for workshop and production environments

• Left-hand cutting direction
• Compatible with 16 ER inserts
• 25 mm shank diameter
• 200 mm overall length

Precision compatibility for repeatable internal turning

This toolholder combines an ISO designation of S25R STIL with a compact 25 mm shank, offering a balanced solution for internal turning operations where repeatable positioning matters. The ER16 clamping standard ensures secure retention of the cutting head and simplifies tool changes when exchanging indexable inserts. By choosing a holder built for standardised insert systems, preparation time is reduced and reproducibility is improved, which helps maintain cycle-time stability in small-batch and series production.

Rigidity and setup benefits that save time on the shopfloor

With a 200 mm overall length and a body diameter of 29 mm, the design provides a compromise between reach and stiffness. The 40 mm cutting height delivers adequate engagement for common insert geometries while the tool’s modest mass of 0.762 kg makes handling and spindle load predictable. These attributes translate into fewer repeat setups and reduced vibration risk, so processes run more smoothly and allow reliable surface finishes even when operators have varying experience levels.

Left-hand orientation explained and its practical advantages

Left-hand cutting orientation means the cutting action is directed towards the left when viewed from the spindle, a necessary configuration for specific internal turning strategies and certain CNC program routines. This orientation is particularly useful when machining internal bores from one direction without reversing tool rotation or when matching the geometry of a left-hand insert. For workshops adapting existing toolpaths, selecting the correct orientation avoids unnecessary reprogramming and keeps production continuous.

Workshop versatility and quality assurance for trade professionals

Designed for compatibility with 16 ER insert systems, this holder supports fast insert indexing and replacement, reducing downtime in maintenance cycles. As part of a pragmatic toolkit, it offers a clear upgrade path for precision-focused workshops that require standard interfaces and dependable mechanical clamping. The product aligns with Metav’s focus on accessible precision: a supplier network that supports reliable supply, straightforward logistics and a quality filter that helps procurement teams minimise risk.

For left-hand internal turning tasks choose the Teknik Cutting Tools STI boring bar and contact Metav Werkzeuge for tailored advice and reliable supply from Emmerich

Technical data

• Article number: K363TM
• Manufacturer: Teknik Makina
• Description: STI for IR/ER Indexable Inserts boring bar
• ISO designation: S25R STIL
• Clamping: ER16

Core specifications

• Shank diameter: 25 mm
• Overall length: 200 mm
• Diameter: 29 mm
• Cutting height: 40 mm
• Weight: 0.762 kg

Materials & features

• Left-hand cutting direction
• Compatible with 16 ER indexable inserts
• Designed for internal turning applications
• ER16 collet/clamp interface

FAQ

What insert systems fit this toolholder?
The STI toolholder is compatible with 16 ER indexable inserts and is intended for IR/ER-style insert geometries.

Is the orientation left-hand or right-hand?
This holder is manufactured for left-hand cutting, suited to internal turning routines requiring that orientation.

What are the key mounting dimensions?
Key dimensions include a 25 mm shank diameter, 200 mm overall length and a 29 mm body diameter, which inform rigidity and reach considerations.

Can this be used for heavy interrupted cuts?
The design targets stable internal turning; however, suitability for interrupted cuts depends on machine power, fixture rigidity and the selected insert grade.

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