50mm Boring Bar S40T MTUNL 40mm Shank For TNMG 1604, 93° Cutting Angle - Teknik Makina

Take advantage of a robust combination of stability and insert compatibility for predictable turning performance: the solid S40T MTUNL design delivers high rigidity through a 40 mm shank and a 50 mm body diameter, while compatibility with TNMG 1604 indexable inserts keeps tooling costs predictable—order via Metav Werkzeuge or consult their specialists for application advice

S40T MTUNL boring bar — MTUN for TNMG indexable inserts, left-hand

The S40T MTUNL is a left-hand boring bar designed for turning operations that require secure clamping of TNMG 1604 indexable inserts and steady cutting behaviour in medium-duty machining.

• Left-hand cutting orientation
• 40 mm shank diameter
• For TNMG 1604 inserts
• 300 mm overall length

Stable cutting for consistent surface finish and longer tool life

The substantial 40 mm shank and a 50 mm body diameter create a rigid toolholder that reduces vibration and chatter, producing a more consistent surface finish on turned parts. A stable holder means fewer tool changes and less rework, which contributes directly to greater process efficiency and predictable batch quality. The measured mass of the toolholder helps dampen transient forces during interrupted cuts, so cycle times can be maintained without sacrificing finish.

Proven insert compatibility and straightforward geometry

Designed for TNMG 1604 indexable inserts, the holder’s MTUN seating ensures repeatable positioning and simple clamping for quick insert changes. The cutting height 60 mm and the tool’s cutting angle 93° maintain the correct approach geometry for conventional turning set-ups, preserving insert life and minimising manual adjustment. Because the design follows common insert standards, spare inserts and replacements are widely available, which lowers logistics complexity and keeps production moving.

Practical integration into workshop tooling systems

Marked with the ISO designation S40T MTUNL, the holder is ready for standard lathe tool posts that accept a 40 mm shank; the 300 mm overall length gives reach for typical bore and face-turning tasks while retaining stiffness where it matters. At a weighed 2.852 kg, the component balances mass and handling for straightforward mounting and removal. The straightforward configuration supports efficient tool inventory management and reduces set-up time during changeovers.

For procurement or technical clarification on the Teknik Makina MTUN holders, contact Metav Werkzeuge in Emmerich for tailored advice and reliable delivery to the workshop; e-mail info@metav-werkzeuge.com or call +49 2822 7131930

Technical Data

• Article number: K524TM
• ISO designation: S40T MTUNL
• Type: MTUN for TNMG indexable inserts
• Cutting direction: left
• Compatible insert: TNMG 1604

Core data

• Shank diameter: 40 mm
• Overall length: 300 mm
• Body diameter: 50 mm
• Cutting height: 60 mm
• Weight: 2.852 kg
• Cutting angle: 93°

Special features

• For TNMG 1604 indexable inserts
• MTUN holder geometry
• Left-hand orientation
• Suitable for conventional turning operations
• SKU: K524TM

FAQ

Which inserts fit this holder?
The holder accepts TNMG 1604 indexable inserts; the MTUN seating secures the insert for repeatable positioning in the Teknik Makina S40T MTUNL boring bar (SKU K524TM).

Is the cutting direction left or right?
This model is specified for a left-hand cutting direction and is intended for left-hand turning operations.

What shank size is required for the tool post?
The boring bar uses a 40 mm shank (ISO designation S40T MTUNL) and suits tool posts that clamp a 40 mm holder.

How does the geometry affect insert life?
The combination of correct cutting height and a 93° cutting angle keeps the insert load balanced, which helps to extend insert life and maintain consistent chip formation.

What identifier should be used when ordering spares?
Use SKU K524TM and ISO designation S40T MTUNL when ordering to ensure the correct MTUN boring bar is supplied.

Teknik Makina: Manufacturer: Teknik Cutting Tools, Buyukkayacık OSB Mah.422 Nolu Sokak.No:9, Selcuklu/KONYA/TURKEY / Responsible: Metav Werkzeuge GmbH; Parkring 45; 46446 Emmerich; +49 2822 7131930; eMail: info@metav-werkzeuge.com