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

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

$94.43 USD

✓ In Stock & Fast Dispatch: Order processing: typically 1–3 business days after confirmation.
✓ Global Shipping: Delivery: generally 5–20 business days, depending on destination and shipping method.
✓ Guaranteed Quality: Check model, dimensions and compatibility before ordering. | Direct Factory Outlet
✓ Technical Support: Need grade selection help? Contact Engineer

💰 Bulk savings 2-9 pcs · 6% OFF | 10+ pcs · 12% OFF

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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.

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Technical FAQ & Buying Guide

How do I choose the correct specification?

When choosing CNC cutting tools, check the full model code, dimensions, grade and selected variant before ordering. Do not rely on the product image alone.

How can I check compatibility with my existing setup?

For carbide inserts, tool holders, drills and end mills, compare the mounting dimensions, connection type and manufacturer's specifications with your holder or machine. If you are unsure, share your existing part number and machining application with us before ordering.

What quantity and price unit am I ordering?

Check the product listing for the selling unit, pack quantity and included components. If it is unclear whether the price is per piece or per pack, or whether a tool body and inserts are sold separately, contact us before purchasing.

How should I choose cutting parameters?

Select cutting speed, feed rate and depth of cut using the relevant manufacturer's recommendations for your tool model, workpiece material, machine conditions and coolant method. The same settings are not suitable for every product or application.

Are bulk discounts available?

Our automatic quantity discount is 6% off for 2–9 items and 12% off for 10 or more items, based on the total product quantity in the cart. Other offers may not combine with this discount; check the applicable offer conditions.

When will my order ship and arrive?

According to our shipping policy, orders are typically processed and shipped within 1–3 business days after confirmation. Delivery generally takes 5–20 business days, depending on your destination and shipping method. Customs clearance or unforeseen delays may affect delivery times. A tracking number is sent by email after shipment.