Tungaloy 16ER 19W-B AH725 External Whitworth Threading Carbide Insert (10pcs) - BEYOND

Tungaloy 16ER 19W-B AH725 External Whitworth Threading Carbide Insert (10pcs)

$94.43 USD

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Description

TUNGALOY 16ER 19W-B AH725

External 55° Whitworth Specialist | 19 TPI | AH725 Nano-PVD Grade

Product Overview

The Tungaloy 16ER 19W-B AH725 is a high-precision external threading insert specifically engineered for the 55° Whitworth thread standard. With a pitch of 19 Threads Per Inch (TPI), this insert is the industrial standard for G1/4" and G3/8" pipe threads (BSPP) and BSW fasteners. 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 integrated "-B" chipbreaker geometry is a critical feature that prevents the long, stringy chips common in pipe 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
19
Pitch (TPI)
W
Whitworth
B
Chipbreaker

Technical Specifications: Metric vs. Imperial

Technical Feature Imperial (Whitworth) Metric Equivalent
Thread Pitch 19 TPI 1.337 mm
Inscribed Circle (IC) 3/8 inch 9.525 mm
Standard Application G 1/4", G 3/8" (Pipe) BSW 1/4", 5/16"

Pitch Selection Guidance: The 19W is a Full Profile insert. This is critical for external threading as it forms the complete 55° profile—crest, root, and flank—simultaneously. This ensures the outer diameter is perfectly calibrated to BSPP standards, guaranteeing pressure-tight fits for hydraulic and pneumatic fittings without needing secondary finishing.

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 cuts.

-B Geometry: Precision Chip Control (槽型)

Efficient chip evacuation is vital for automated production. The -B chipbreaker forces chips to curl tightly and break into manageable lengths. This prevents "bird-nesting" on the tool post and ensures a mirror-like surface finish in precision machining.

Recommended Cutting Parameters

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

  • Cutting Speed (Vc): 100 - 180 m/min (330 - 590 SFM)
  • Total Radial Depth: 0.86 mm
  • Number of Passes: 6 - 10 passes

*Pro Tip: For 19 TPI threads, 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 G1/4 Fittings" - Matthias K., Germany
"Very consistent 19 TPI. The AH725 grade lasts much longer than other brands in 304 stainless steel."

⭐⭐⭐⭐⭐ "Excellent Chip Control" - Kenji Y., Japan
"The -B chipbreaker works great. No more bird-nesting on our CNC lathes. Genuine Japanese quality."

⭐⭐⭐⭐ "Sharp and Durable" - Dave W., USA
"High quality threads every time. Fits our SER holders perfectly. Great for high-volume production."

⭐⭐⭐⭐⭐ "Mirror Finish" - Luca R., Italy
"Surface finish is top-tier. Best price for authentic Tungaloy threading inserts."

⭐⭐⭐⭐⭐ "High Reliability" - Sarah L., UK
"Exactly what we needed for our BSW 1/4" bolts. Fast shipping and very well packaged."

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 threads, you need the **16IR 19W** series.

Q: Is AH725 good for Heat-Resistant Alloys?

A: Yes! AH725 is a high-toughness PVD grade designed for stainless steel, 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.

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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.