Sandvik 266RKF‑40‑16 Internal Thread Turning Boring Bar

📌 Product Overview

The Sandvik Coromant 266RKF‑40‑16 is a high‑precision
CoroThread 266 indexable boring bar designed specifically
for internal thread turning and CNC machining of metal components.
Engineered with a robust shank and right‑hand cutting orientation, this
toolholder delivers stable performance, excellent surface finish, and reliable
results in demanding machining environments.

✔ Key Advantages

• ✔ Precision internal threading and boring bar for CNC turning
• ✔ Right‑hand cutting orientation for consistent thread results
• ✔ CoroThread 266 geometry optimized for low cutting forces
• ✔ Stable tool life with high surface finish and repeatability
• ✔ Metal cutting performance suitable for steels and ferrous alloys
• ✔ Designed to pair with ISO compatible inserts and toolholders

⚙ Recommended Materials

• ✔ Stainless steel internal threading
• ✔ Alloy steel CNC thread turning
• ✔ Ferrous metals with precision finishing requirements

✖ Not Recommended For

• ✖ External turning or parting operations
• ✖ Milling and drilling without boring setup
• ✖ Non‑CNC manual thread cutting

🔥 Performance Highlights

Designed as a benchmark in CNC internal thread turning,
the 266RKF‑40‑16 boring bar delivers precise chip control,
consistent thread form accuracy, and excellent surface finish quality. The
indexable design supports efficient tool changes and stable metal cutting
operations in high‑throughput production environments where repeatability
and tool life are critical.

🔁 Same Type Recommended Models

To support a wider range of internal threading needs on CNC lathes,
consider the following related CoroThread 266 series boring bars:

• 266RKF‑25‑16 – Compact boring bar for smaller internal thread diameters
• 266RKF‑32‑16 – Mid‑range internal thread turning toolholder
• 266RKF‑50‑16 – Larger shank version for deeper internal threading
• 266RKF‑16‑16 – Smaller overall size for tight internal machining

These models extend the CoroThread 266 platform for precision internal
thread turning and indexable boring tool applications across different
part sizes.

🔩 Compatible Categories

Complete your tool setup with matching holders and accessories in our

Turning Tools

and

Tool Holder

categories.

📞 Technical Confirmation

If you are unsure whether the 266RKF‑40‑16 internal thread turning boring bar
fits your CNC lathe, material, or thread profile requirements, please contact
our technical team before ordering for optimized thread turning guidance.

Image Notice: Product images are for reference only. Actual product
appearance may vary depending on production batch and tooling configuration.