Tungaloy 11IR 0.5ISO-B AH725 Internal Threading Carbide Insert (10pcs) - BEYOND

Tungaloy 11IR 0.5ISO-B AH725 Internal Threading Carbide Insert (10pcs)

$93.47 USD

Price shown is a starting point. Contact us for a precise quote based on your requirements.

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Description

TUNGALOY 11IR 0.5ISO-B AH725

Fine Metric Internal Specialist | 0.5mm Pitch | AH725 Nano-PVD Coating

Product Overview

The Tungaloy 11IR 0.5ISO-B AH725 is a high-precision internal threading insert engineered for ultra-fine 0.5mm pitch ISO metric threads (common in M3 and M4 assemblies). This indexable carbide insert utilizes the world-renowned AH725 PVD coated carbide grade, providing the edge sharpness and thermal stability required for CNC machining of small-diameter bores in stainless steel and high-temp alloys. The "-B" chipbreaker is a critical feature for internal operations, ensuring that fine, needle-like chips are curled and evacuated to prevent damage to the delicate thread flanks. Made in Japan, this insert is the gold standard for precision machining in micro-mechanical and electronic hardware applications.

Technical Designation Breakdown

11
Size (IC)
I
Internal
R
Right Hand
0.5
Pitch (mm)
ISO
Metric
B
Chipbreaker

Technical Specifications: Metric vs. Imperial

Technical Feature Metric (ISO) Imperial (TPI)
Thread Pitch 0.5 mm 50.8 Threads Per Inch
Inscribed Circle (IC) 6.35 mm 1/4 inch
Pitch Type Full Profile 0.5ISO Fine Thread Specialist

Pitch Selection Tip: The 0.5ISO is a "Full Profile" insert. This means it trims the crest of the thread while cutting the root, ensuring the finished internal threading meets exact ISO tolerances. This is crucial for small pitches where manual OD correction of the bore is nearly impossible.

Grade: AH725 PVD Nano-Coated Carbide

The AH725 grade is Tungaloy's premium micro-grain carbide with a multilayered PVD coating. It is the long-tail keywords industry favorite for stainless steel turning and fine threading because it maintains a sharp edge under high-heat conditions. Its superior adhesion resistance prevents the thread profile from distorting, ensuring exceptional tool life.

-B Geometry: Precision Chipbreaker (槽型)

In fine-pitch internal threading, chips can easily clog the hole. The -B chipbreaker is specially designed to break even the smallest chips, keeping the bore clear for the next pass. This is vital for precision machining in automated CNC milling centers.

Recommended Cutting Parameters

Optimized for P (Steel) and M (Stainless Steel):

  • Cutting Speed (Vc): 60 - 120 m/min (195 - 395 SFM)
  • Total Radial Depth: 0.31 mm
  • Number of Passes: 4 - 8 passes (Recommended for 0.5 pitch)

*Pro Tip: For 0.5mm pitch, use high-RPM and ensure minimal tool overhang to prevent vibration.*

Global Verified Reviews

⭐⭐⭐⭐⭐ "Perfect for M3 threads" - Yuto S., Japan
"Very stable and sharp. The 0.5 pitch is perfect every time on our Swiss-type lathes."

⭐⭐⭐⭐⭐ "Best for Medical Parts" - David L., USA
"We use AH725 for small stainless components. The tool life is incredible for such a fine pitch."

⭐⭐⭐⭐ "Great Chip Evacuation" - Hans B., Germany
"The -B geometry really helps in deep holes. No more clogged threads."

⭐⭐⭐⭐⭐ "Fast Delivery & Original" - Marco V., Italy
"Genuine Tungaloy inserts. Mirror finish on the threads. Very happy with the performance."

⭐⭐⭐⭐⭐ "Solid Value" - Arthur G., UK
"Consistent results. These micro-inserts are much more durable than the cheaper alternatives we tried."

Technical Q&A

Q: Which boring bar does this insert fit?

A: It fits any standard internal threading holder with an 11-size (1/4" IC) pocket, such as the **SNR0008K11** or **SNR0010K11**.

Q: Is this suitable for heat-resistant alloys?

A: Absolutely. The **AH725** grade is specifically designed for S-class materials including Inconel and Titanium.

Q: Can I cut 0.5mm TPI threads with this?

A: This is a **0.5 ISO Metric** profile (60°). If your TPI thread is 60° and the pitch matches 50.8 TPI, it may work, but it is optimized for Metric standards.

Expert Machining Tip: Material Comparison

For internal threading, PVD grades like **AH725** are superior to CVD grades because they maintain a sharper edge profile. For a fine 0.5mm pitch, edge sharpness is the #1 factor in preventing thread "burring" and ensuring a smooth assembly.

© Technical Content by cnchome-beyond.com - Scraping Protection Active

Technical FAQ & Buying Guide

Are your carbide inserts interchangeable with major brands like Sandvik, Iscar, or Kennametal?

Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.

How do I choose the correct insert grade and chipbreaker for machining Stainless Steel (M) vs. Carbon Steel (P)?

We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:

  • For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
  • For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
What are the recommended cutting speed (Vc) and feed rate (f) parameters to maximize tool life?

The optimal cutting parameters vary depending on the workpiece hardness and operation type:

  • For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
  • For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Do you offer bulk discounts or wholesale pricing for machine shops and distributors?

Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.

What is your international shipping policy and typical lead time for orders?

We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.

How do you guarantee the quality and tolerance precision of your CNC tools?

All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.