Tungaloy 16IR 1.5ISO-B AH725 Internal Threading Carbide Insert (10pcs)

Tungaloy 16IR 1.5ISO-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 1.5ISO-B AH725

Internal ISO Metric Specialist | 1.5mm Pitch | AH725 Nano-PVD Grade

Product Overview

The Tungaloy 16IR 1.5ISO-B AH725 is a high-precision internal threading insert engineered for 1.5mm pitch ISO metric threads, the industrial standard for M10 and M12 internal fasteners. This indexable carbide insert utilizes the premium AH725 PVD coated carbide grade, renowned for its exceptional edge toughness and thermal stability during CNC machining. The integrated "-B" chipbreaker geometry is a critical advancement for internal threading, forcing chips to curl and break in tight bore environments to prevent "bird-nesting" and surface damage. Made in Japan, this insert is the professional choice for precision machining in stainless steel, carbon steel, and high-temp alloys.

Technical Designation Breakdown

16
Size (IC)
I
Internal
R
Right Hand
1.5
Pitch (mm)
ISO
Metric
B
Chipbreaker

Technical Specifications: Metric vs. Imperial

Technical Feature Metric (ISO) Imperial (TPI)
Thread Pitch 1.5 mm 16.93 Threads Per Inch
Inscribed Circle (IC) 9.525 mm 3/8 inch
Standard Application M10, M12 Internal Fine/Coarse Internal Threading

Pitch Selection Guidance: The 1.5ISO is a Full Profile insert. This means the tool forms the complete 60° thread profile, including the crest and root, in one operation. This is critical for internal threading because it ensures the major diameter is precisely cut to specification, guaranteeing a perfect fit for M10/M12 fasteners without needing secondary finishing passes.

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 internal cuts.

-B Geometry: Internal Chip Management (槽型)

Internal threading often suffers from "bird-nesting" chips that wrap around the boring bar. The -B chipbreaker geometry is engineered to curl chips tightly, breaking them into manageable lengths that can be easily flushed out of the bore by coolant. This protects the internal thread flanks and ensures mirror-like precision machining results.

Recommended Cutting Parameters

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

  • Cutting Speed (Vc): 90 - 170 m/min (295 - 560 SFM)
  • Total Radial Depth (ap): 0.92 mm
  • Number of Passes: 8 - 14 passes

*Pro Tip: For internal threads, always use a modified flank infeed (29°) to reduce tool pressure and prevent vibration in long-overhang boring bars.*

Global Verified Reviews

⭐⭐⭐⭐⭐ "Standard for M10 production" - Hans W., Germany
"Very stable 1.5mm pitch results. The AH725 grade lasts significantly longer in stainless than standard carbide."

⭐⭐⭐⭐⭐ "Great Chip Evacuation" - Hiroshi K., Japan
"Internal work is much cleaner with the -B geometry. Chips break small and flush out easily. Original Tungaloy quality."

⭐⭐⭐⭐ "Tough and Reliable" - Robert L., USA
"Using this on alloy steel for internal bores. Excellent tool life and mirror-like finish. Fits my SNR bar perfectly."

⭐⭐⭐⭐⭐ "Highly Recommended" - Marco D., Italy
"Surface finish is top-tier. Fast delivery and authentic Japanese packaging. Perfect for precision aerospace parts."

⭐⭐⭐⭐⭐ "Zero Vibration" - Liam F., UK
"Consistent performance over hundreds of parts. The full profile ensures M12 bolts fit perfectly every time."

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 must use the **ER** 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 Selection

For internal threading, PVD grades like **AH725** are superior to CVD grades because they maintain a sharper edge. This sharpness is essential to reduce cutting pressure 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.