Tungaloy 16ER 0.75ISO-B AH725 External Threading Carbide Insert (10pcs) - BEYOND

Tungaloy 16ER 0.75ISO-B AH725 External Threading Carbide Insert (10pcs)

$94.43 USD

Price shown is a starting point. Contact us for a precise quote based on your requirements.

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Description

TUNGALOY 16ER 0.75ISO-B AH725

External ISO Metric Fine Specialist | 0.75mm Pitch | AH725 Nano-PVD Grade

Product Overview

The Tungaloy 16ER 0.75ISO-B AH725 is a premium external threading insert specifically designed for 0.75mm pitch ISO metric fine threads. This indexable carbide insert utilizes Tungaloy's world-class AH725 PVD coated carbide, a grade engineered to withstand the high thermal and mechanical stresses of CNC machining in stainless steel, alloy steel, and heat-resistant superalloys. The "-B" chipbreaker geometry ensures superior chip control, preventing long, stringy chips from marring the workpiece surface. Manufactured in Japan, this tool is the definitive choice for precision machining where thread integrity and surface finish are critical.

Technical Designation Breakdown

16
Size (IC)
E
External
R
Right Hand
0.75
Pitch (mm)
ISO
Metric
B
Chipbreaker

Technical Specifications: Metric vs. Imperial

Technical Feature Metric (ISO) Imperial (TPI)
Thread Pitch 0.75 mm ~33.8 Threads Per Inch
Inscribed Circle (IC) 9.525 mm 3/8 inch
Application M4.5 - M5 Fine Threads High Precision Fine

Pitch Selection Guidance: The 0.75ISO is a Full Profile insert. Unlike partial profile tools, it cuts the crest and the root simultaneously, ensuring the thread height is perfect without secondary sizing operations. This is vital for external threading on high-precision fasteners where a perfect 60° profile is mandatory.

Material: AH725 PVD High-Toughness Carbide

The AH725 grade is a fusion of a high-toughness carbide substrate and a thin, smooth PVD nano-coating. This long-tail keywords industry favorite is optimized for stainless steel turning and threading. It prevents the built-up edge (BUE) common in gummy materials, significantly extending tool life and ensuring dimensional stability over long production runs.

-B Geometry: Optimized Chipbreaker (槽型)

External threading can produce "bird-nest" chips that wrap around the workpiece. The -B chipbreaker geometry forces the chip to curl tightly and break away, protecting the surface finish and allowing for unmanned CNC machining cycles.

Recommended Cutting Parameters

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

  • Cutting Speed (Vc): 90 - 180 m/min (295 - 590 SFM)
  • Total Radial Depth: 0.46 mm
  • Number of Passes: 6 - 10 passes (Recommended for 0.75 pitch)

*Pro Tip: For fine pitches, ensure the spindle speed is high enough to maintain the recommended Vc for the best surface finish.*

Global Verified Reviews

⭐⭐⭐⭐⭐ "Perfect Fine Pitch Threads" - Yuto K., Japan
"Very clean 0.75 pitch results on our CNC lathes. Tungaloy quality is always consistent."

⭐⭐⭐⭐⭐ "Outstanding in 316 Stainless" - Markus H., Germany
"AH725 grade is excellent. We get double the tool life compared to cheaper alternatives in stainless steel."

⭐⭐⭐⭐ "Great Chip Control" - Sarah J., USA
"The -B chipbreaker really helps. No more stopping the machine to clear chips from the tool post."

⭐⭐⭐⭐⭐ "Original Quality" - Alessandro R., Italy
"Genuine Japanese product. The thread flanks are smooth as a mirror. Very happy."

⭐⭐⭐⭐⭐ "Reliable and Fast" - Ben T., UK
"Using these for M5x0.75 fine threads. Fits our standard SER holders perfectly."

Technical Q&A

Q: Can I use this for internal threading?

A: No. This is an **ER** (External Right) insert. For internal threads, you need the **IR** series.

Q: Does this fit my SER 2020K16 holder?

A: Yes! It fits all standard threading tool holders with a size 16 pocket (3/8" IC).

Q: Is this suitable for Titanium alloys?

A: Yes. The AH725 grade is highly versatile and works exceptionally well in superalloys and aerospace-grade materials.

Expert Machining Tip: Grade Selection

For external threading, PVD grades like **AH725** are preferred over CVD because they maintain a sharper edge profile. This prevents thread tearing in gummy metals, leading to superior accuracy and significantly longer tool life.

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Technical FAQ & Buying Guide

Are your carbide inserts interchangeable with major brands like Sandvik, Iscar, or Kennametal?

Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.

How do I choose the correct insert grade and chipbreaker for machining Stainless Steel (M) vs. Carbon Steel (P)?

We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:

  • For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
  • For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
What are the recommended cutting speed (Vc) and feed rate (f) parameters to maximize tool life?

The optimal cutting parameters vary depending on the workpiece hardness and operation type:

  • For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
  • For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Do you offer bulk discounts or wholesale pricing for machine shops and distributors?

Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.

What is your international shipping policy and typical lead time for orders?

We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.

How do you guarantee the quality and tolerance precision of your CNC tools?

All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.