Tungaloy 16IR 2.0ISO-B AH725 Internal Threading Carbide Insert (10pcs)

Tungaloy 16IR 2.0ISO-B AH725 Internal 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 16IR 2.0ISO-B AH725

Internal ISO Metric Specialist | 2.0mm Pitch | AH725 Nano-PVD Grade

Product Overview

The Tungaloy 16IR 2.0ISO-B AH725 is a high-performance internal threading insert engineered for 2.0mm pitch ISO metric threads, the standard for M14 and M16 coarse internal fasteners. This indexable carbide insert features Tungaloy's premium AH725 PVD coated carbide, a grade famous for its extreme edge toughness and heat resistance during CNC machining. The integrated "-B" chipbreaker geometry is a game-changer for internal threading, ensuring that chips are tightly curled and broken within the bore to prevent damage to the thread flanks. Made in Japan, this insert is the professional choice for precision machining in stainless steel, carbon steel, and high-strength alloys.

Technical Designation Breakdown

16
Size (IC)
I
Internal
R
Right Hand
2.0
Pitch (mm)
ISO
Metric
B
Chipbreaker

Technical Specifications: Metric vs. Imperial

Technical Feature Metric (ISO) Imperial (TPI)
Thread Pitch 2.0 mm 12.7 Threads Per Inch
Inscribed Circle (IC) 9.525 mm 3/8 inch
Application Internal M14/M16 Heavy Duty Internal Coarse

Pitch Selection Guidance: The 2.0ISO is a Full Profile insert. This is critical for internal threading as it forms the complete 60° thread—cutting the crest and root simultaneously. This ensures the internal diameter (ID) is perfectly calibrated to ISO standards, guaranteeing exact clearance and fit for M14/M16 fasteners without the need for manual cresting or secondary boring operations.

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. This long-tail keywords industry favorite ensures stable tool life and exceptional surface quality even in restricted bores or difficult-to-reach internal profiles.

-B Geometry: Advanced Chip Control (槽型)

Internal threading often suffers from chips "bird-nesting" inside the workpiece. The -B chipbreaker geometry is engineered to curl chips tightly, snapping them into small pieces that are easily flushed out by coolant. This protects the internal finish and prevents tool breakage during CNC machining.

Recommended Cutting Parameters

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

  • Cutting Speed (Vc): 80 - 150 m/min (260 - 490 SFM)
  • Total Radial Depth: 1.23 mm
  • Number of Passes: 10 - 16 passes

*Pro Tip: For 2.0mm internal pitch, use a constant volume infeed or a modified flank infeed (29°) to minimize vibration in boring bars.*

Global Verified Reviews

⭐⭐⭐⭐⭐ "Perfect for M16 threads" - Lukas V., Germany
"Consistent 2.0mm pitch. The AH725 grade lasts much longer than other brands we've tried in alloy steel."

⭐⭐⭐⭐⭐ "Great for blind holes" - Kenji O., Japan
"The -B chipbreaker is excellent. Chips are small and don't get stuck in the bore. Original Tungaloy quality."

⭐⭐⭐⭐ "Smooth Finish" - Dave R., USA
"High quality internal threads every time. No vibration even with a longer overhang on our boring bar."

⭐⭐⭐⭐⭐ "Highly Reliable" - Fabio L., Italy
"Mirror-like finish on the thread flanks. Fast shipping and the product is definitely authentic."

⭐⭐⭐⭐⭐ "Professional Choice" - Sarah J., UK
"The full profile is a huge time saver. Perfect fit for our SNR16 holders. Highly recommend for CNC shops."

Technical Q&A

Q: Which boring bar does this insert fit?

A: It fits all standard **SNR** internal threading bars with a size 16 pocket (3/8" IC).

Q: Can I use this for external threads?

A: No. This is an **IR** (Internal Right) insert. For external work, you require the **ER** series.

Q: Is AH725 good for High-Temp 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 Selection

For internal threading, PVD grades like **AH725** are superior to CVD because they maintain a sharper cutting edge. This sharpness reduces cutting forces and vibration in boring bars, leading to superior accuracy and significantly longer 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.