Thread Turning Tools for CNC Lathes

When engineers and CNC machinists search for thread turning or threading in a lathe, they’re not just looking for general information—they want practical, high-performance solutions that improve precision, cycle time, and tool economy. At Scandinavian Tool Systems AB (STS), we deliver exactly that.

Optimized threading tools for real-world challenges

Whether you’re threading small diameters in high-nickel alloys or need consistent performance across high-volume runs, STS offers reliable, innovation-driven tooling systems. All our products are developed and manufactured in Sweden and distributed globally across 40+ countries.

We serve CNC workshops, automotive suppliers, aerospace, energy sectors, and anyone requiring tight-tolerance threading performance.

QuadCut® — redefining external & internal thread turning

Traditional threading inserts are often triangular and horizontally mounted. STS broke this convention with the QuadCut®:

• Upright, square insert for stronger cutting action
• Four usable edges = longer insert life and lower cost per thread
• Stable insert mounting minimizes deflection and improves surface finish
• Available for internal and external threading, with ISO, UN, ACME, Whitworth, and NPT profiles

QuadCut’s compact design is perfect for tight setups like Swiss-type lathes or operations near chuck jaws.

TwinCut® — for large pitch threads in small bores

TwinCut® is STS’s patented solution for threading in tight internal diameters where large pitch threads are required. The system features:

• Dual cutting edges for efficiency
• Precise indexing for repeatability
• RH and LH threading options

Ideal for oil & gas, hydraulics, and powertrain applications where deep threads and precision matter.

LATUMA® coating — performance under pressure

For materials like stainless steel and heat-resistant superalloys, LATUMA® coating enhances your tool’s thermal stability and wear resistance.

• Withstands higher cutting speeds
• Prolongs tool life
• Reduces oxidation and crater wear

Choose LATUMA-coated inserts for superior performance in demanding thread turning operations.

Frequently asked questions

What is thread turning?
A turning operation where the thread geometry is cut with an indexable insert across multiple passes along the workpiece’s rotation.

What thread profiles does QuadCut® support?
ISO, UN, ACME, Whitworth and NPT.

Why choose an upright square insert over a triangular one?
QuadCut’s upright square insert gives you four usable cutting edges instead of the fewer edges a triangular insert offers, plus more stable mounting, less deflection and a better surface finish.

Can the same tool cut both right-hand and left-hand threads?
TwinCut® offers both RH and LH threading options.

Choosing between QuadCut® and TwinCut®

Both systems are built for CNC thread turning, but they solve different problems. Use the table below as a starting point, and talk to our engineers if your job sits between the two.

Want the full technical walkthrough?

This page covers what STS sells and why it works. For step-by-step programming guidance, cutting data and G76 cycle examples, read the full technical guide to thread turning.

Why professionals choose STS thread turning tools

• Patented geometries like QuadCut® and TwinCut®
• Swedish-made tools with a focus on precision and repeatability
• High-value per insert – longer tool life, fewer tool changes
• Global availability and support

Trusted across:

Automotive
Aerospace
Energy
Oil & Gas
Hydraulics
Powertrain

Whether you’re programming G76 cycles or switching between thread standards, STS gives you the tools to do it right—the first time.

Get Expert Support for Your Threading Needs

Need help selecting the right threading insert for your next job? Want to reduce your cost per thread while improving output quality? Contact Scandinavian Tool Systems — we’re here to help you make threading more efficient.

Get Expert Support for Your Threading Needs
  

info@scandinavian-tool.se