Tungaloy 9GR150 9GR250 9GR300 9GR350 NS530 Internal Grooving Carbide Inserts

Name: Tungaloy 9GR150 9GR250 9GR300 9GR350 NS530 Internal Grooving Carbide Inserts
Brand: Tungaloy
SKU: 8496396435628
Price: 155.8 USD
Availability: InStock

$155.80 USD

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Description

Description

TUNGALOY 9GR SERIES NS530

High-Precision Internal Grooving | 1.5mm - 3.5mm | NS530 Cermet Grade

Product Overview

The Tungaloy 9GR Series (150/250/300/350) NS530 is a professional-grade solution for internal grooving operations requiring extreme precision and superior surface quality. Spanning widths from 1.5mm to 3.5mm, these indexable carbide inserts are designed to fit size 9 internal boring bars. The core advantage of this series lies in the NS530 Cermet grade, a titanium-based composite that offers exceptional chemical stability. This results in a "mirror finish" and prolonged tool life when machining carbon steel, alloy steel, and cast iron. Made in Japan, these inserts are the preferred choice for CNC machining professionals who refuse to compromise on accuracy.

Technical Designation Breakdown

9
Pocket Size

G
Grooving

R
Right Hand

150-350
Width (x100)

Size Specifications: Metric vs. Imperial

Model Number	Metric Width (CW)	Imperial Approx.	Corner Radius
9GR150 NS530	1.50 mm	0.059 inch	0.15 mm
9GR250 NS530	2.50 mm	0.098 inch	0.20 mm
9GR300 NS530	3.00 mm	0.118 inch	0.20 mm
9GR350 NS530	3.50 mm	0.138 inch	0.20 mm

Material: NS530 Cermet Technology

The NS530 grade is Tungaloy's premier Cermet for finishing. Unlike standard tungsten carbide, Cermet has a much lower affinity for steel workpieces, which prevents Built-Up Edge (BUE). This long-tail keywords industry favorite allows for higher cutting speeds and ensures that the dimensions of your internal grooves remain constant throughout the entire batch of precision machining.

Internal Geometry Design

The 9GR series features a positive rake angle and a sharp cutting edge optimized for internal boring. This design minimizes cutting forces, which is vital for preventing vibration and chatter in internal grooving where the tool overhang is often long.

Recommended Cutting Parameters

Optimized for P (Steel) and K (Cast Iron):

Cutting Speed (Vc): 100 - 200 m/min (330 - 650 SFM)
Feed Rate (f): 0.05 - 0.12 mm/rev (0.002 - 0.0047 ipr)

*Note: For larger widths (3.0mm+), ensure high pressure coolant is directed into the groove to assist with chip evacuation.*

Global Verified Reviews

⭐⭐⭐⭐⭐ "Mirror Finish on 4140 Steel" - Hans R., Germany
"The 9GR300 NS530 is simply incredible. The surface finish inside the bore is so smooth it looks polished. Cermet is the way to go for finishing."

⭐⭐⭐⭐⭐ "Consistent and Accurate" - Sato K., Japan
"We use the 1.5mm for precision O-ring grooves. Tungaloy quality is always reliable. The NS530 grade lasts much longer than standard carbide for our finishing runs."

⭐⭐⭐⭐ "Great Performance in Cast Iron" - Mark T., USA
"Very impressed with the 9GR350. It handles cast iron beautifully with zero chipping. A very stable grooving tool."

⭐⭐⭐⭐⭐ "Top Choice for Finishing" - Alessandro B., Italy
"The 2.5mm width is spot on. If you need a clean, precise internal groove, don't hesitate to use the NS530 grade."

⭐⭐⭐⭐⭐ "Reliable and Fast Shipping" - Liam J., Australia
"Original Japanese inserts. They fit my SNR bars perfectly and the tool life is fantastic. Excellent value."

Technical Q&A

Q: Can I use NS530 for 304 Stainless Steel?

A: NS530 is optimized for P (Steel) and K (Cast Iron). For Stainless Steel, we recommend a PVD carbide grade like AH725 to handle the material's work-hardening properties.

Q: Which tool holders are compatible with 9GR inserts?

A: These inserts are designed for Tungaloy **CTIR/L** or **GI-series** boring bars that utilize a size 9 pocket.

Q: Is this insert suitable for roughing?

A: Cermet is designed for high-speed finishing. For heavy roughing or large stock removal, a coated carbide insert is preferred for higher impact resistance.

Expert Machining Tip: Why Cermet?

When performing **internal grooving** in steel, heat is your enemy. **NS530 Cermet** handles high temperatures better than carbide and maintains a sharper edge. This sharpness is the key to preventing "burrs" and achieving the high-precision fit required for modern CNC machining projects.

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.