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

Name: Tungaloy 16ER 16W-B AH725 External Whitworth Threading Carbide Insert (10pcs)
Brand: BEYOND
SKU: 16ER16W-BAH725
Price: 94.43 USD
Availability: InStock

$94.43 USD

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Description

Description

TUNGALOY 16ER 16W-B AH725

External 55° Whitworth Specialist | 16 TPI | AH725 Nano-PVD Grade

Product Overview

The Tungaloy 16ER 16W-B AH725 is a high-performance external threading insert designed for the 55° Whitworth thread standard (BSW/BSPP). Featuring a pitch of 16 Threads Per Inch (TPI), it is commonly used for 3/8" Whitworth fasteners and specific pipe fittings. This indexable carbide insert features the world-renowned AH725 PVD coated carbide, a grade engineered for extreme toughness and thermal stability during CNC machining. The integrated "-B" chipbreaker geometry is a critical advancement for external threading, ensuring that chips are tightly curled and snapped to prevent surface damage and "bird-nesting." Made in Japan, this insert is the professional choice for precision machining in stainless steel, alloy steel, and carbon steel.

Technical Designation Breakdown

16
Size (IC)

E
External

R
Right Hand

16
Pitch (TPI)

W
Whitworth

B
Chipbreaker

Technical Specifications: Metric vs. Imperial

Technical Feature	Imperial (Whitworth)	Metric Equivalent
Thread Pitch	16 TPI	1.588 mm
Inscribed Circle (IC)	3/8 inch	9.525 mm
Thread Angle	55 Degrees	N/A (ISO is 60°)

Pitch Selection Guidance: The 16W is a Full Profile insert. This is critical for external threading as it forms the complete 55° Whitworth thread—simultaneously cutting the rounded crest and root. This ensures your 3/8" or G-series threads meet exact pressure-seal specifications without needing additional manual finishing passes.

Material: AH725 PVD High-Performance 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 external cuts.

-B Geometry: Precision Chipbreaker (槽型)

Effective chip control is vital for automated production. The -B chipbreaker on the 16ER 16W-B is specifically designed to curl and snap chips away from the workpiece. This eliminates the risk of chips wrapping around the tool, ensuring the mirror-like precision machining results required for hydraulic and plumbing components.

Recommended Cutting Parameters

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

Cutting Speed (Vc): 90 - 170 m/min (295 - 560 SFM)
Total Radial Depth: 1.02 mm
Number of Passes: 8 - 12 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 and increases tool life.*

Global Verified Reviews

⭐⭐⭐⭐⭐ "Excellent for BSW threads" - George B., UK
"Very consistent 16 TPI results. The AH725 grade is incredibly tough and the finish on my stainless bolts is mirror-like."

⭐⭐⭐⭐⭐ "Great Chip Management" - Hiroshi S., Japan
"The -B chipbreaker works perfectly. No more bird-nesting on the CNC lathe. Original Tungaloy quality."

⭐⭐⭐⭐ "Durable Tool Life" - Robert K., USA
"Handles 1045 and 4140 steel easily. The tool life is predictable and reliable for batch production."

⭐⭐⭐⭐⭐ "High Precision" - Lukas M., Germany
"Authentic Japanese inserts. The 55-degree profile is perfect and the full profile saves us a lot of time in setup."

⭐⭐⭐⭐⭐ "Mirror Finish" - Marco D., Italy
"Threads are incredibly clean. Fast shipping and the best price for genuine Tungaloy."

Technical Q&A

Q: Which tool holder does this insert fit?

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

Q: Can I use this for internal threads?

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

Q: Is AH725 good for Titanium 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 Advantage

For external threading of 55° 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 without tearing the material, resulting in superior accuracy and longer tool life.

Internal insert Coated ：AH725 Designation: 16ER16W-B AH725

ød:9.525, t: 1.1 , R3 : 0.9 , rε : 0.2 。

Garde：AH725 P15 - P30 M15 - M30 K25 - K30 S15 - S25 Coating：Main composition (Ti, Al)N Thickness 2/ μm
Feature： Good balance between wear and chipping resistance
- Suitable for machining steel and stainless steel under general cutting
conditions

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.