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

Tungaloy 16ER 16W-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 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.

© Technical Content by cnchome-beyond.com - Scraping Protection Active

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

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.