Tungaloy 16IR 14W-B AH725 Internal Whitworth Threading Carbide Insert (10pcs)

Name: Tungaloy 16IR 14W-B AH725 Internal Whitworth Threading Carbide Insert (10pcs)
Brand: BEYOND
SKU: 16IR14W-BAH725
Price: 94.43 USD
Availability: InStock

$94.43 USD

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Description

Description

TUNGALOY 16IR 14W-B AH725

Internal 55° Whitworth Specialist | 14 TPI | AH725 Nano-PVD Grade

Product Overview

The Tungaloy 16IR 14W-B AH725 is a high-performance internal threading insert meticulously engineered for the 55° Whitworth thread standard (BSW/BSPP). Featuring a pitch of 14 Threads Per Inch (TPI), it is the industrial benchmark for G1/2" through G7/8" internal pipe threads. This indexable carbide insert utilizes the premium AH725 PVD coated carbide grade, renowned for its exceptional edge toughness and thermal resistance during CNC machining. The specialized "-B" chipbreaker geometry is essential for internal threading, aggressively curling chips in confined spaces to prevent surface scoring and "bird-nesting." Made in Japan, this tool is optimized for precision machining in stainless steel, carbon steel, and alloy steels.

Technical Designation Breakdown

16
Size (IC)

I
Internal

R
Right Hand

14
Pitch (TPI)

W
Whitworth

B
Chipbreaker

Technical Specifications: Metric vs. Imperial

Feature	Imperial (Whitworth)	Metric Equivalent
Thread Pitch	14 TPI	1.814 mm
Inscribed Circle (IC)	3/8 inch	9.525 mm
Common Sizes	G 1/2", G 5/8", G 3/4"	BSW 7/16" - 1/2"

Pitch Selection Guidance: The 14W is a Full Profile insert. This is critical for internal threading as it forms the complete 55° thread profile—including the crest and root radius—simultaneously. This ensures the minor diameter is perfectly calibrated to BSPP standards, guaranteeing pressure-tight fits for hydraulic and pneumatic components without manual adjustment passes.

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 for extreme heat resistance. This long-tail keywords industry favorite ensures stable tool life and exceptional surface quality in both continuous and interrupted internal cuts.

-B Geometry: Aggressive Chip Management (槽型)

In internal boring operations, chip room is scarce. The -B chipbreaker geometry on the 16IR 14W-B is specifically designed to curl and snap chips into small "C" shapes. This is critical for automated CNC machining, as it prevents chip accumulation that could damage the thread or the boring bar.

Recommended Cutting Parameters

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

Cutting Speed (Vc): 80 - 160 m/min (260 - 525 SFM)
Total Radial Depth: 1.16 mm
Number of Passes: 8 - 14 passes

*Pro Tip: For 14 TPI internal work, use a modified flank infeed (27° to 29°) to reduce tool pressure and prevent chatter in long-overhang boring bars.*

Global Verified Reviews

⭐⭐⭐⭐⭐ "Standard for our hydraulic shop" - George L., UK
"Consistent 14 TPI results. The AH725 grade handles the gummy 316 stainless perfectly. No burrs on the internal crests."

⭐⭐⭐⭐⭐ "Great Chip Control" - Hiroshi K., Japan
"The -B chipbreaker is a lifesaver in small bores. Chips come out clean. Genuine Tungaloy quality is always reliable."

⭐⭐⭐⭐ "Tough in Alloy Steel" - Robert M., USA
"Very durable. I've used these for hundreds of internal threads in 4140 steel and they hold up much better than cheaper brands."

⭐⭐⭐⭐⭐ "High Precision" - Lukas H., Germany
"Full profile is perfect for G 1/2" pipe work. Fits our SNR bars exactly. Mirror-like finish inside the threads."

⭐⭐⭐⭐⭐ "Fast shipping, great tool" - Arjun P., UAE
"Original Japanese product. The 14W pitch is spot on. Very happy with the tool life in stainless production."

Technical Q&A

Q: Which boring bar does this insert fit?

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

Q: Can I use this for external Whitworth threads?

A: No. This is an **IR** (Internal Right) insert. For external 14 TPI Whitworth, you require the **16ER 14W** series.

Q: Is AH725 good for interrupted cuts?

A: Yes! AH725 is a high-toughness PVD grade specifically designed to withstand the impacts of interrupted cuts or scale on the material surface.

Expert Machining Tip: Grade Advantage

For internal threading, PVD grades like **AH725** are superior to CVD because they maintain a sharper cutting edge. This sharpness is essential to properly form the rounded crests and roots of the 55° Whitworth profile, reducing cutting force and improving tool life in confined spaces.

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.