25mm 93° Boring Bar MTUN for TNMG Indexable Inserts, 20mm Shank - Teknik Makina

Take advantage of the practical combination of a 93° cutting angle and right-hand cutting for stable, repeatable operations; the compact dimensions and lightweight design support efficient tool changeovers and predictable cycle times. Order directly via Metav Werkzeuge or consult our specialists for integration advice.

S20R MTUNR Boring Bar (K441TM) – 93° right-hand, Ø25 mm reach (Teknik Makina)

The S20R MTUNR boring bar is a purpose-built toolholder for TNMG indexable inserts, designed for right-hand cutting operations where controlled chip formation and consistent bore finish are required.

• Right-hand cutting, 93° cutting angle
• Compatible with TNMG 1604 inserts
• Shank Ø20 mm for secure clamping
• 200 mm overall length, weight 0.513 kg

Stable insert mounting for consistent bore quality

The S20R MTUNR toolholder combines a 93° cutting angle with a secure insert seat to reduce chatter and promote repeatable results when using TNMG 1604 indexable inserts. The geometry supports positive chip flow and a controlled cutting engagement, which helps to preserve insert life and maintain surface finish over longer production runs. By relying on a conventional insert form factor, the toolholder simplifies stock management and enables fast, predictable index changes during planned maintenance or routine insert rotation.

Engineered dimensions for predictable machine behaviour

Measured dimensions are tuned for workshop compatibility: a shank diameter of 20 mm, an effective diameter of 25 mm and a 200 mm overall length provide reach without excessive overhang, helping to reduce vibration and maintain concentricity. The cutting height of 50 mm ensures correct insert positioning in many standard toolposts and turrets, and the low weight of 0.513 kg reduces dynamic loads on bearings and slides. These dimensional choices deliver a balance between accessibility in confined setups and the rigidity needed for stable boring operations.

Faster set-up and reliable production throughput

Designed for indexable inserts, this toolholder supports quick insert replacement and reduced downtime compared with regrindable cutters. The right-hand cutting orientation and standard clamping interface mean straightforward integration into existing turning and boring processes, permitting easy exchange between holders or machines. With its compact profile and proven mechanics, the holder contributes to predictable cycle times and fewer process interruptions, supporting lean production goals and consistent part quality.

For tailored technical advice or to arrange supply of the S20R MTUNR boring bar (K441TM), contact Metav Werkzeuge in Emmerich: info@metav-werkzeuge.com • +49 2822 7131930 — experts are available to assist with machine integration and order planning.

Technical Data

• Article number: K441TM
• Manufacturer: Teknik Makina
• ISO designation: S20R MTUNR
• Model designation (EN): MTUN for TNMG Indexable Inserts

Dimensions & Weights

• Diameter: 25 mm
• Shank diameter: 20 mm
• Cutting height: 50 mm
• Overall length: 200 mm
• Weight: 0.513 kg
• Cutting angle: 93°
• Direction: right

Compatibility & Features

• For TNMG 1604 inserts
• Clamping holder size: 16
• Right-hand cutting
• Files: 62de7ed30f56dbb4de4dbf43, 62de7e33a9cff922f4703d1b

FAQ

Which indexable inserts fit this holder?
The S20R MTUNR boring bar (Teknik Makina, K441TM) is specified for use with TNMG 1604 indexable inserts.

What are the key dimensions to check for machine setup?
Relevant dimensions include shank Ø20 mm, overall length 200 mm, effective diameter 25 mm and cutting height 50 mm; weight is 0.513 kg.

Is the cutting direction left or right?
This toolholder is configured for right-hand cutting with a 93° cutting angle.

Does the product data state suitable materials to machine?
The supplied specification identifies compatibility with TNMG inserts but does not list specific workpiece materials; material suitability depends on insert grade and cutting parameters.

What clamping or holder size is required?
The data indicates a clamping holder size of 16 and a standard TNMG insert seat for secure attachment.

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