Tungaloy 7GR100 7GR150 7GR200 NS530 Internal Grooving Carbide Inserts (1.0mm-2.0mm)

$124.63 USD

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

SIZE: 7GR100 NS530

7GR100 NS530
7GR150 NS530
7GR200 NS530

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Description

TUNGALOY 7GR SERIES NS530

Precision Internal Grooving | 1.0mm, 1.5mm, 2.0mm | NS530 Cermet Grade

Product Overview

The Tungaloy 7GR Series (100/150/200) NS530 is a collection of high-performance internal grooving inserts designed for ultra-precise slotting and retaining ring applications. Available in widths of 1.0mm, 1.5mm, and 2.0mm, these indexable grooving tools are the industry standard for small-bore machining. Featuring the premium NS530 Cermet grade, these inserts provide an unmatched surface finish and exceptional chemical stability when machining steel and cast iron. Made in Japan, this series is engineered to eliminate vibration and provide stable CNC machining performance in confined internal spaces.

Technical Designation Breakdown

7
Insert Size
G
Grooving
R
Right Hand
100-200
Groove Width

Size Comparison: Metric vs. Imperial

Model Number Metric Width (CW) Imperial Equivalent Corner Radius
7GR100 NS530 1.00 mm 0.0394 inch 0.10 mm
7GR150 NS530 1.50 mm 0.0591 inch 0.15 mm
7GR200 NS530 2.00 mm 0.0787 inch 0.20 mm

NS530 Cermet: The Secret to Mirror Finishes

The NS530 grade is a titanium-based Cermet that bridges the gap between ceramics and carbide. It is highly resistant to built-up edge (BUE) and oxidation, making it the ideal choice for high-speed finishing. When performing precision machining in medium-to-low carbon steels, this long-tail keywords industry favorite delivers a surface finish so clean it often eliminates the need for secondary grinding operations.

Internal Grooving Geometry (槽型)

The 7GR geometry is optimized for low cutting forces. This is essential for internal grooving because internal boring bars are prone to deflection. The sharp edge and positive rake angle ensure clean chips and dimensional accuracy for every precision groove.

Recommended Cutting Parameters

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

  • Cutting Speed (Vc): 80 - 160 m/min (260 - 525 SFM)
  • Feed Rate (f): 0.03 - 0.08 mm/rev (0.0012 - 0.0031 ipr)

*Note: For the 1.0mm width (7GR100), use the lower end of the feed range to prevent edge chipping.*

Global Verified Reviews

⭐⭐⭐⭐⭐ "Best finishing insert" - Matthias S., Germany
"The 7GR200 NS530 produces a mirror finish on my steel sleeves. Cermet really makes a difference compared to coated carbide for finishing."

⭐⭐⭐⭐⭐ "Perfect 1.5mm Grooves" - Hiroshi W., Japan
"Consistent results every time. Tungaloy Japan quality is unbeatable for precision internal work. Very stable."

⭐⭐⭐⭐ "Great for mass production" - Robert T., USA
"We use the 7GR100 for small retaining rings. The tool life is very predictable, which is great for our CNC setup."

⭐⭐⭐⭐⭐ "Mirror Surface" - Luca F., Italy
"The surface finish is amazing. Best price I've found for genuine NS530 grade. Shipping was very fast."

⭐⭐⭐⭐⭐ "Precise and Reliable" - Ahmed K., UAE
"Very happy with these inserts. The 1.0mm width is spot on and the Cermet grade is very tough."

Technical Q&A

Q: Can I use NS530 for Stainless Steel?

A: NS530 is a Cermet optimized for Steel and Cast Iron. For 300-series Stainless, a PVD carbide grade like AH725 is usually more effective due to higher toughness.

Q: What tool holder fits these inserts?

A: They fit Tungaloy GI-series or CTIR/L internal grooving bars designed for the size 7 insert pocket.

Q: Does the width change with the corner radius?

A: No, the CW (Cutting Width) is maintained at the nominal value (1.0, 1.5, or 2.0), while the corner radius (RE) is subtracted from the corners to prevent sharp stress points.

Expert Machining Tip: Why Use Cermet?

For internal grooving, **NS530 Cermet** is your best friend for finishing. Its low affinity for steel means chips won't weld to the tip (Built-up Edge), ensuring your slots remain perfectly sized with a mirror-like finish. Always use ample coolant to keep the chip evacuation path clear!

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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.