32mm Boring Bar STI for IR/ER Indexable Inserts 25mm Shank, 40mm Cutting Height - Teknik Makina

Take advantage of the combination of stable shank Ø25 mm, compatibility with IR/ER indexable inserts (22 IR) and an overall length of 200 mm for dependable deep-reach boring; order the STI boring bar directly via Metav Werkzeuge or consult our advisors for application support.

Bohrstange K359TM – STI boring bar for IR/ER indexable inserts, shank Ø25 mm

A robust Bohrstange K359TM designed for right-hand cutting and engineered to accept IR22 clamping for precision internal boring.

• Indexable-insert holder for IR/ER systems
• Shank Ø25 mm for stable clamping
• Overall length 200 mm for deep reach
• Compatible with 22 IR inserts and IR22 holder

Increased process reliability for internal machining

The STI boring bar offers a clear production advantage through its indexable inserts compatibility and compact design. With a shank Ø25 mm, the holder improves rigidity at the tool–spindle interface, reducing vibration and promoting consistent bore geometry. The right-hand cutting orientation together with the tooling geometry supports predictable chip flow and stable cutting conditions. These technical attributes translate into fewer reworks and a steadier machining cycle, which is essential when reproducible internal diameters are required.

Precision where depth and clearance matter

Designed with an overall length of 200 mm and a body diameter 32 mm, the bar allows access to deeper bores while maintaining lateral stiffness. The cutting height 40 mm defines the effective insert seating and is matched to common IR/ER inserts, ensuring correct chip control and repeatable seat height after index changes. The component mass of 0.757 kg contributes to balanced rotation and reduces the risk of chatter in medium-duty applications. For set-ups that demand exact axial positioning and minimal runout, this geometry offers a pragmatic balance between reach and rigidity.

Simple integration and short set-up times

The STI design is compatible with standard IR22 clamping systems and is supplied in an industry-recognised ISO format (S25R STIR), which eases tool change and programming routines across multiple machines. The modular approach of using indexable inserts minimises downtime because insert changes are quick, and insert re-indexing restores cutting parameters without complete tool replacement. For production planners, this means shorter set-up intervals and predictable tool life cycles — a measurable gain for throughput and cost-efficiency.

Contact Metav Werkzeuge for an order recommendation or technical consultation on integrating the STI holder into production; email info@metav-werkzeuge.com or call +49 2822 7131930 for guidance and availability

Technical data

• Article number: K359TM
• Manufacturer: Teknik Makina
• ISO designation: S25R STIR
• SKU: K359TM

Facts

• Shank diameter: 25 mm
• Cutting height: 40 mm
• Diameter: 32 mm
• Overall length: 200 mm
• Weight: 0.757 kg
• Cutting direction: right

Special features

• For IR/ER indexable inserts (STI for IR/ER Indexable Inserts)
• Suitable for 22 IR inserts
• Clamping holder reference: IR22

FAQ

Which insert types fit this holder?
The holder accepts 22 IR indexable inserts and is specified for IR/ER systems; compatibility is given by the STI design and the IR22 clamping reference.

Is the tool suitable for deep internal boring applications?
Yes, the overall length of 200 mm and the 32 mm body diameter provide improved reach while maintaining rigidity for moderate-depth internal work.

What does the ISO designation S25R STIR indicate?
The ISO code describes the shank and holder geometry; S25R STIR denotes the shank series and right-hand orientation suitable for standardised clamping systems.

How does the shank diameter affect performance?
A shank Ø25 mm increases clamping stability, which reduces vibration and enhances dimensional repeatability compared with thinner shanks.

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