50mm Boring Bar MTWN For TNMG Indexable Inserts 40mm Shank, 60mm Cutting Height, Left-Hand - Teknik Makina

Take advantage of the combination of precise indexable-insert compatibility, robust 40 mm shank stability and a 300 mm overall length for reliable internal turning operations — order via Metav Werkzeuge or consult the advisors for tailored application support.

K539TM Boring bar — MTWN for TNMG indexable inserts, left-hand, 40 mm shank (Teknik Makina)

K539TM is a left-hand MTWN boring bar engineered for internal turning with TNMG 1604 indexable inserts, optimised for stable metal removal in workshop and CNC lathe environments.

Left-hand cutting for reverse operations
Compatible with TNMG 1604 inserts
40 mm shank, 300 mm overall length

Precision compatibility that reduces set-up time

The MTWN configuration with support for TNMG 1604 indexable inserts keeps clamping and indexation straightforward, enabling a repeatable tool set-up across multiple machines. This standardised insert interface simplifies inventory and reduces downtime when changing tools. The integrated ISO designation S40T MTQNL indicates conventional shank and seat geometry, which translates into a reliable fit with common toolholders and predictable cutting behaviour.

Stable shank and mass for consistent surface finishes

A 40 mm shank combined with a 50 mm outer diameter and a mass of 2.807 kg provides the rigidity needed to resist deflection during internal turning, especially on long overhangs. Greater stability reduces vibration and improves surface finish, which can extend the life of indexable inserts and lower overall machining costs. The robust construction is particularly beneficial when facing interrupted cuts or harder workpiece materials that demand a steady cutting platform.

Cutting angle and geometry tailored for effective chip control

The 107.5° cutting angle contributes to effective chip flow and clearance within confined bores. This geometry balances cutting forces and tool engagement so that chip evacuation is improved and insert wear is more uniform. For workshops unfamiliar with cutting-angle nomenclature: a larger approach angle like this typically reduces radial force and helps maintain tool life while preserving dimensional accuracy on the machined bore.

Workshop integration and serviceability that save time

With an overall length of 300 mm and clamping interface noted as size 16, the bar integrates with many conventional clamping systems and shortens changeover routines. The use of widely available TNMG 1604 inserts means replacement cutters are easy to source, allowing quick turnarounds without custom grinding. This practical compatibility supports continuous production and keeps toolroom complexity to a minimum.

For precision internal turning with Teknik Makina quality, contact Metav Werkzeuge for product availability and application advice from Emmerich — email info@metav-werkzeuge.com or call +49 2822 7131930

Technical data

• Article number: K539TM
• Manufacturer: Teknik Makina
• Designation: MTWN for TNMG Indexable Inserts
• ISO designation: S40T MTQNL

Facts

• Shank diameter: 40 mm
• Outer diameter: 50 mm
• Cutting height: 60 mm
• Overall length: 300 mm
• Weight: 2.807 kg
• Cutting angle: 107.5°
• Compatible inserts: TNMG 1604

Special features

• Left-hand cutting direction
• MTWN holder geometry for indexable inserts
• Clamping holder size: 16
• Suitable for standard toolholders and CNC lathe use

FAQ

Which inserts fit this boring bar?
The K539TM boring bar accepts TNMG 1604 indexable inserts; the MTWN holder geometry is designed to secure those insert sizes reliably.

Is the tool suitable for internal turning of steel components?
Yes, the MTWN design of the K539TM combined with a rigid 40 mm shank provides the stability required for internal turning operations in a variety of steels.

What is the cutting direction and why does it matter?
This bar is configured for left-hand cutting; that orientation is selected to match the lathe's rotation and the intended machining strategy for reverse or specific clamping setups.

How long is the bar and what shank size should the toolholder accept?
The tool has an overall length of 300 mm and a shank diameter of 40 mm, so a compatible toolholder that accepts a 40 mm shank is required.

Does the cutting angle support good chip evacuation?
The 107.5° cutting angle is aimed at improved chip control and reduced radial forces, helping to maintain consistent finishing and prolong insert life.

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