Tungaloy 16ER 14W-B AH725 External Whitworth Threading Carbide Insert (10pcs) - BEYOND

Tungaloy 16ER 14W-B AH725 External Whitworth Threading Carbide Insert (10pcs)

$94.43 USD

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Description

TUNGALOY 16ER 14W-B AH725

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

Product Overview

The Tungaloy 16ER 14W-B AH725 is a high-precision external threading insert specifically engineered for the 55° Whitworth thread standard. Featuring a pitch of 14 Threads Per Inch (TPI), this insert is the industrial standard for G1/2" through G7/8" pipe threads (BSPP/BSW). 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 "-B" chipbreaker geometry is a critical feature that prevents the long, stringy chips common in threading, ensuring a clean workspace and superior tool life. Made in Japan, this tool is optimized for precision machining in stainless steel, carbon steel, and alloy steels.

Technical Designation Breakdown

16
Size (IC)
E
External
R
Right Hand
14
Pitch (TPI)
W
Whitworth
B
Chipbreaker

Whitworth Pitch Selection: 14 TPI

The 14W designation identifies this as a 14 threads per inch Whitworth form. Unlike metric 60° threads, the Whitworth standard uses a 55° angle with rounded roots and crests. This is a Full Profile insert, meaning it finishes the entire thread form, including the outer diameter. This is vital for pressure-tight seals in external threading applications.

Technical 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"

Material: AH725 PVD High-Grade Carbide

The AH725 grade is Tungaloy's most versatile PVD coating for threading and stainless steel turning. It combines a micro-grain substrate for impact resistance with a multilayered PVD coating for heat protection. This long-tail keywords favorite ensures that whether you are cutting high-carbon steel or gummy stainless, the tool maintains a sharp edge and consistent performance.

-B Geometry: External Chipbreaker ()

Effective chip control is the backbone of automated production. The -B chipbreaker on the 16ER 14W-B is specifically designed to curl and snap chips away from the workpiece. This eliminates the risk of "bird-nesting" which can cause catastrophic tool failure or surface finish degradation in precision machining.

Recommended Cutting Parameters

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

  • Cutting Speed (Vc): 90 - 180 m/min (295 - 590 SFM)
  • Total Radial Depth: 1.16 mm
  • Number of Passes: 8 - 14 passes

*Pro Tip: For Whitworth threads, using a radial infeed or a slightly modified flank infeed (27°) helps maintain the integrity of the 55° profile.*

Global Verified Reviews

⭐⭐⭐⭐⭐ "Perfect for BSPP pipe work" - James D., UK
"Very consistent 14 TPI results. The AH725 grade is durable and the finish on the stainless fittings is excellent."

⭐⭐⭐⭐⭐ "Great Chip Control" - Hiro M., Japan
"The -B chipbreaker works exactly as advertised. Small chips, no nesting. Authentic Tungaloy quality."

⭐⭐⭐⭐ "Tough and Reliable" - Robert K., Canada
"Handles 1045 steel easily. The edge stays sharp for a long time. Fits my SER holder perfectly."

⭐⭐⭐⭐⭐ "Mirror Finish" - Luca P., Italy
"The surface finish on the threads is top-tier. Highly recommend for any shop doing precision hydraulic parts."

⭐⭐⭐⭐⭐ "Fast shipping, great tool" - Arjun V., UAE
"Genuine product. The full profile makes setup much faster. 14 TPI is spot on every time."

Technical Q&A

Q: Which tool holder does this fit?

A: It fits any standard **SER** external threading holder with a size 16 (3/8" IC) pocket.

Q: Can I use this for internal threads?

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

Q: Is AH725 good for Titanium?

A: Yes! AH725 is a high-toughness PVD grade that performs well in stainless, Titanium, and other superalloys.

Expert Machining Tip: Grade Advantage

For external threading, PVD grades like **AH725** are preferred over CVD because they maintain a sharper cutting edge. This sharpness is essential to properly form the 55° Whitworth profile without tearing the material, resulting in a superior seal and 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.