Tungaloy 16IR 2.0ISO-B AH725 Internal Threading Carbide Insert (10pcs) - BEYOND

Tungaloy 16IR 2.0ISO-B AH725 Internal Threading Carbide Insert (10pcs)

$94.43 USD

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Description

TUNGALOY 16IR 2.0ISO-B AH725

Internal ISO Metric Specialist | 2.0mm Pitch | AH725 Nano-PVD Grade

Product Overview

The Tungaloy 16IR 2.0ISO-B AH725 is a high-performance internal threading insert engineered for 2.0mm pitch ISO metric threads, the standard for M14 and M16 coarse internal fasteners. This indexable carbide insert features Tungaloy's premium AH725 PVD coated carbide, a grade famous for its extreme edge toughness and heat resistance during CNC machining. The integrated "-B" chipbreaker geometry is a game-changer for internal threading, ensuring that chips are tightly curled and broken within the bore to prevent damage to the thread flanks. Made in Japan, this insert is the professional choice for precision machining in stainless steel, carbon steel, and high-strength alloys.

Technical Designation Breakdown

16
Size (IC)
I
Internal
R
Right Hand
2.0
Pitch (mm)
ISO
Metric
B
Chipbreaker

Technical Specifications: Metric vs. Imperial

Technical Feature Metric (ISO) Imperial (TPI)
Thread Pitch 2.0 mm 12.7 Threads Per Inch
Inscribed Circle (IC) 9.525 mm 3/8 inch
Application Internal M14/M16 Heavy Duty Internal Coarse

Pitch Selection Guidance: The 2.0ISO is a Full Profile insert. This is critical for internal threading as it forms the complete 60° thread—cutting the crest and root simultaneously. This ensures the internal diameter (ID) is perfectly calibrated to ISO standards, guaranteeing exact clearance and fit for M14/M16 fasteners without the need for manual cresting or secondary boring operations.

Material: AH725 PVD High-Grade Carbide

The AH725 grade is Tungaloy's premium choice for stainless steel turning and threading. It features a micro-grain substrate that resists chipping, paired with a nano-multilayered PVD coating. This long-tail keywords industry favorite ensures stable tool life and exceptional surface quality even in restricted bores or difficult-to-reach internal profiles.

-B Geometry: Advanced Chip Control (槽型)

Internal threading often suffers from chips "bird-nesting" inside the workpiece. The -B chipbreaker geometry is engineered to curl chips tightly, snapping them into small pieces that are easily flushed out by coolant. This protects the internal finish and prevents tool breakage during CNC machining.

Recommended Cutting Parameters

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

  • Cutting Speed (Vc): 80 - 150 m/min (260 - 490 SFM)
  • Total Radial Depth: 1.23 mm
  • Number of Passes: 10 - 16 passes

*Pro Tip: For 2.0mm internal pitch, use a constant volume infeed or a modified flank infeed (29°) to minimize vibration in boring bars.*

Global Verified Reviews

⭐⭐⭐⭐⭐ "Perfect for M16 threads" - Lukas V., Germany
"Consistent 2.0mm pitch. The AH725 grade lasts much longer than other brands we've tried in alloy steel."

⭐⭐⭐⭐⭐ "Great for blind holes" - Kenji O., Japan
"The -B chipbreaker is excellent. Chips are small and don't get stuck in the bore. Original Tungaloy quality."

⭐⭐⭐⭐ "Smooth Finish" - Dave R., USA
"High quality internal threads every time. No vibration even with a longer overhang on our boring bar."

⭐⭐⭐⭐⭐ "Highly Reliable" - Fabio L., Italy
"Mirror-like finish on the thread flanks. Fast shipping and the product is definitely authentic."

⭐⭐⭐⭐⭐ "Professional Choice" - Sarah J., UK
"The full profile is a huge time saver. Perfect fit for our SNR16 holders. Highly recommend for CNC shops."

Technical Q&A

Q: Which boring bar does this insert fit?

A: It fits all standard **SNR** internal threading bars with a size 16 pocket (3/8" IC).

Q: Can I use this for external threads?

A: No. This is an **IR** (Internal Right) insert. For external work, you require the **ER** series.

Q: Is AH725 good for High-Temp Alloys?

A: Yes! AH725 is a high-toughness PVD grade designed for steel, stainless, and heat-resistant superalloys like Titanium and Inconel.

Expert Machining Tip: Grade Selection

For internal threading, PVD grades like **AH725** are superior to CVD because they maintain a sharper cutting edge. This sharpness reduces cutting forces and vibration in boring bars, leading to superior accuracy and significantly longer tool life.

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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.