Tungaloy 16ER 11W-B AH725 External Whitworth Threading Carbide Insert (10pcs)

Name: Tungaloy 16ER 11W-B AH725 External Whitworth Threading Carbide Insert (10pcs)
Brand: BEYOND
SKU: 16ER11W-BAH725
Price: 94.43 USD
Availability: InStock

$94.43 USD

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Description

Description

TUNGALOY 16ER 11W-B AH725

External 55° Whitworth Specialist | 11 TPI | AH725 Nano-PVD Grade

Product Overview

The Tungaloy 16ER 11W-B AH725 is a premium external threading insert designed for the 55° Whitworth thread standard. With a pitch of 11 Threads Per Inch (TPI), it is the go-to solution for G-series (BSPP) pipe threads ranging from 5/8" to 7/8". This indexable carbide insert utilizes Tungaloy's world-class AH725 PVD coated carbide, providing the exceptional toughness needed for CNC machining of high-tensile steels and stainless steel. The integrated "-B" chipbreaker geometry ensures superior chip control, preventing the long stringy chips typically associated with pipe threading, thereby protecting your workpiece and enhancing tool life. Made in Japan, this insert is the benchmark for precision machining in plumbing, hydraulic, and oil & gas applications.

Technical Designation Breakdown

16
Size (IC)

E
External

R
Right Hand

11
Pitch (TPI)

W
Whitworth

B
Chipbreaker

Understanding the 11W Pitch Selection

The 11W designation refers to 11 threads per inch under the Whitworth (BSW/BSPP) standard, which features a 55-degree included angle and rounded crests/roots. This is a Full Profile insert, meaning it cuts the entire thread form in one cycle. This guarantees that your pipe fittings will meet pressure-tight requirements without needing secondary adjustments to the major diameter.

Feature	Imperial (Whitworth)	Metric Equivalent
Thread Pitch	11 TPI	2.309 mm
Thread Angle	55 Degrees	N/A (Metric is 60°)
Standard Sizes	G 5/8", G 3/4", G 7/8"	~16mm to 22mm BSW

Material: AH725 High-Performance Carbide

The AH725 grade is a specialized PVD-coated micro-grain carbide. This long-tail keywords industry favorite is designed for versatility. It provides a sharp cutting edge for stainless steel turning while maintaining the structural integrity required for heavy carbon steel threading. Its high resistance to thermal cracking makes it ideal for precision machining with or without coolant.

-B Geometry: Precision Chip Management (槽型)

Pipe threading often produces continuous chips that can wrap around the tool. The -B chipbreaker geometry forces the chip to curl and break into small "C" shapes. This is critical for automated CNC machining, as it allows for unmanned operation and prevents surface damage to the threads.

Recommended Cutting Parameters

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

Cutting Speed (Vc): 80 - 160 m/min (260 - 525 SFM)
Total Radial Depth: 1.48 mm
Number of Passes: 10 - 18 passes

*Pro Tip: For 11 TPI, use a radial infeed or a slightly modified flank infeed (27°) for the best balance between surface finish and tool life.*

Global Verified Reviews

⭐⭐⭐⭐⭐ "Perfect for BSPP pipe fittings" - George H., UK
"Consistent 11 TPI threads. The AH725 grade is incredibly tough when working with 316 stainless."

⭐⭐⭐⭐⭐ "Best chip control I've seen" - Takahiro M., Japan
"The -B chipbreaker saves me a lot of time. No more bird-nesting on the lathe. Genuine Tungaloy quality."

⭐⭐⭐⭐ "Durable and Sharp" - Frank S., USA
"Used these for a large run of 3/4" BSW bolts. The finish was perfect even after 100 parts. Fits my SER holder perfectly."

⭐⭐⭐⭐⭐ "High Accuracy" - Marco B., Italy
"Full profile is the only way to go for pipe threads. Guaranteed tight fit every time. Fast shipping too."

⭐⭐⭐⭐⭐ "Reliable Tool Life" - Liam O., Australia
"Very predictable wear. Great for CNC production. These inserts handle the high pressures of 11 TPI threading easily."

Technical Q&A

Q: Which tool holder does this insert fit?

A: It fits any external threading holder with a size 16 (3/8" IC) pocket, such as the **SER2020K16** or **SER2525M16**.

Q: Can I use this for internal pipe threads?

A: No. This is an **ER** (External Right) insert. For internal Whitworth threads, you need the **16IR 11W** series.

Q: Is AH725 better than AH710 for stainless steel?

A: AH725 is generally more versatile and offers better toughness for interrupted cuts or varying stainless grades.

Expert Machining Tip: Grade Advantage

For external threading of Whitworth profiles, 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° profile, reducing "tearing" and improving tool life.

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.