Tungaloy 16IR 1.0ISO-B AH725 Internal Threading Carbide Insert (10pcs)

Tungaloy 16IR 1.0ISO-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 1.0ISO-B AH725

Internal ISO Metric Specialist | 1.0mm Pitch | AH725 Nano-PVD Grade

Product Overview

The Tungaloy 16IR 1.0ISO-B AH725 is a high-precision internal threading insert engineered for 1.0mm pitch ISO metric threads. Ideal for internal bores in M10 and larger fasteners, this indexable carbide insert utilizes the premium AH725 PVD coated carbide grade, renowned for its exceptional edge toughness and wear resistance during CNC machining. The "-B" chipbreaker geometry is a critical feature for internal threading, as it curls and breaks chips in confined spaces, preventing the common issue of chip accumulation inside the bore. Made in Japan, this tool is optimized for precision machining in stainless steel, steel, and high-temperature alloys.

Technical Designation Breakdown

16
Size (IC)
I
Internal
R
Right Hand
1.0
Pitch (mm)
ISO
Metric
B
Chipbreaker

Technical Specifications: Metric vs. Imperial

Technical Feature Metric (ISO) Imperial (TPI)
Thread Pitch 1.0 mm 25.4 Threads Per Inch
Inscribed Circle (IC) 9.525 mm 3/8 inch
Fastener Application M10, M12, M14 Fine Standard Internal 1.0 Pitch

Pitch Selection Guidance: The 1.0ISO is a Full Profile insert. Unlike partial profile tools, this insert cuts the complete thread form—including the crest and root—at a 60° angle. This ensures the internal threading process results in a thread that meets strict ISO tolerances for fit and strength, without needing to adjust for thread depth manually.

Material: AH725 PVD High-Stability Carbide

The AH725 grade is Tungaloy's premium solution for stainless steel turning and specialized 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 consistent tool life and high surface quality in both continuous and interrupted cuts.

-B Geometry: Internal Chip Management (槽型)

Internal threading is notoriously difficult due to chip evacuation. The -B chipbreaker geometry is engineered to curl the chip tightly, allowing it to be flushed out easily by coolant. This protects the internal thread flanks from "re-cutting" chips and ensures a mirror-like finish inside the hole.

Recommended Cutting Parameters

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

  • Cutting Speed (Vc): 90 - 180 m/min (295 - 590 SFM)
  • Total Radial Depth (ap): 0.61 mm
  • Number of Passes: 6 - 10 passes

*Pro Tip: When threading internally, use high-pressure through-spindle coolant to maximize chip evacuation performance of the -B chipbreaker.*

Global Verified Reviews

⭐⭐⭐⭐⭐ "Perfect for M12 Fine Threads" - Yuri K., Russia
"Very stable and predictable. The AH725 grade is my go-to for stainless work."

⭐⭐⭐⭐⭐ "No more chip nesting" - Ken J., Canada
"The -B geometry really works. Chips come out small and don't scratch the bore. Great tool."

⭐⭐⭐⭐ "Great toughness" - Satoshi W., Japan
"Original Japanese quality. Handles interrupted cuts in internal bores without edge failure."

⭐⭐⭐⭐⭐ "Mirror Finish" - Marco P., Italy
"The surface quality inside the thread is incredible. Definitely helps with our QC inspections."

⭐⭐⭐⭐⭐ "Fast Shipping, Quality Tool" - Liam O., Ireland
"Fits my SNR boring bar perfectly. Thread profile is sharp and accurate."

Technical Q&A

Q: Which boring bar does this 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. You need the **ER** series for external work.

Q: Is AH725 good for Titanium?

A: Yes, AH725 is a high-toughness grade that performs exceptionally well in Aerospace materials like Titanium and Inconel.

Expert Machining Tip: Grade Comparison

For internal threading, PVD grades like **AH725** are preferred over CVD because the coating is thinner and the edge is sharper. This reduces cutting pressure, which is critical when working with long-overhang boring bars to prevent chatter and ensure high 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.