Tungaloy 16IR 1.0ISO-B AH725 Internal Threading Carbide Insert (10pcs) - BEYOND

Tungaloy 16IR 1.0ISO-B AH725 Internal Threading Carbide Insert (10pcs)

$94.43 USD

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Description

TUNGALOY 16IR 1.0ISO-B AH725

Internal ISO Metric Specialist | 1.0mm Pitch | AH725 Nano-PVD Grade

Product Overview

The Tungaloy 16IR 1.0ISO-B AH725 is a high-precision internal threading insert engineered for 1.0mm pitch ISO metric threads. Ideal for internal bores in M10 and larger fasteners, this indexable carbide insert utilizes the premium AH725 PVD coated carbide grade, renowned for its exceptional edge toughness and wear resistance during CNC machining. The "-B" chipbreaker geometry is a critical feature for internal threading, as it curls and breaks chips in confined spaces, preventing the common issue of chip accumulation inside the bore. Made in Japan, this tool is optimized for precision machining in stainless steel, steel, and high-temperature alloys.

Technical Designation Breakdown

16
Size (IC)
I
Internal
R
Right Hand
1.0
Pitch (mm)
ISO
Metric
B
Chipbreaker

Technical Specifications: Metric vs. Imperial

Technical Feature Metric (ISO) Imperial (TPI)
Thread Pitch 1.0 mm 25.4 Threads Per Inch
Inscribed Circle (IC) 9.525 mm 3/8 inch
Fastener Application M10, M12, M14 Fine Standard Internal 1.0 Pitch

Pitch Selection Guidance: The 1.0ISO is a Full Profile insert. Unlike partial profile tools, this insert cuts the complete thread form—including the crest and root—at a 60° angle. This ensures the internal threading process results in a thread that meets strict ISO tolerances for fit and strength, without needing to adjust for thread depth manually.

Material: AH725 PVD High-Stability Carbide

The AH725 grade is Tungaloy's premium solution for stainless steel turning and specialized threading. It features a micro-grain substrate that resists chipping, paired with a nano-multilayered PVD coating for extreme heat resistance. This long-tail keywords industry favorite ensures consistent tool life and high surface quality in both continuous and interrupted cuts.

-B Geometry: Internal Chip Management (槽型)

Internal threading is notoriously difficult due to chip evacuation. The -B chipbreaker geometry is engineered to curl the chip tightly, allowing it to be flushed out easily by coolant. This protects the internal thread flanks from "re-cutting" chips and ensures a mirror-like finish inside the hole.

Recommended Cutting Parameters

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

  • Cutting Speed (Vc): 90 - 180 m/min (295 - 590 SFM)
  • Total Radial Depth (ap): 0.61 mm
  • Number of Passes: 6 - 10 passes

*Pro Tip: When threading internally, use high-pressure through-spindle coolant to maximize chip evacuation performance of the -B chipbreaker.*

Global Verified Reviews

⭐⭐⭐⭐⭐ "Perfect for M12 Fine Threads" - Yuri K., Russia
"Very stable and predictable. The AH725 grade is my go-to for stainless work."

⭐⭐⭐⭐⭐ "No more chip nesting" - Ken J., Canada
"The -B geometry really works. Chips come out small and don't scratch the bore. Great tool."

⭐⭐⭐⭐ "Great toughness" - Satoshi W., Japan
"Original Japanese quality. Handles interrupted cuts in internal bores without edge failure."

⭐⭐⭐⭐⭐ "Mirror Finish" - Marco P., Italy
"The surface quality inside the thread is incredible. Definitely helps with our QC inspections."

⭐⭐⭐⭐⭐ "Fast Shipping, Quality Tool" - Liam O., Ireland
"Fits my SNR boring bar perfectly. Thread profile is sharp and accurate."

Technical Q&A

Q: Which boring bar does this 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. You need the **ER** series for external work.

Q: Is AH725 good for Titanium?

A: Yes, AH725 is a high-toughness grade that performs exceptionally well in Aerospace materials like Titanium and Inconel.

Expert Machining Tip: Grade Comparison

For internal threading, PVD grades like **AH725** are preferred over CVD because the coating is thinner and the edge is sharper. This reduces cutting pressure, which is critical when working with long-overhang boring bars to prevent chatter and ensure high 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.