Mitsubishi WNMG080408-MS US7020 Stainless Steel Turning Inserts (10pcs/box) - BEYOND

Mitsubishi WNMG080408-MS US7020 Stainless Steel Turning Inserts (10pcs/box)

$92.26 USD

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

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Description

MITSUBISHI WNMG080408-MS US7020

High-Speed Stainless Steel Machining Expert | 100% Made in Japan

Product Overview

The Mitsubishi WNMG080408-MS US7020 is a premium, double-sided 80° trigon negative insert designed for high-efficiency stainless steel turning. Engineered for stable CNC machining at higher cutting speeds, the US7020 CVD coating provides industry-leading wear resistance and thermal stability. Featuring a versatile 0.8mm corner radius and the MS chipbreaker, this indexable carbide insert is your best solution for achieving superior surface finishes and extended tool life when machining austenitic and martensitic stainless steels.

ISO Designation Identification

W
Trigon 80°
N
Negative 0°
M
Tolerance
G
Hole/Chip
08
IC 12.7mm
04
Thick 4.76mm
08
Radius 0.8mm
MS
Finishing

Technical Specifications: Metric vs. Imperial

Technical Feature Metric (ISO) Imperial (ANSI)
Model Number WNMG 080408-MS WNMG 432-MS
Inscribed Circle (IC) 12.7 mm 0.500 inch
Corner Radius 0.8 mm 0.031 inch

Advanced Grade: US7020 (High-Speed Cutting)

The US7020 grade is Mitsubishi's specialized CVD solution for high-speed stainless steel machining. It features an Al2O3+TiN coating that offers superior heat resistance, preventing thermal deformation of the cutting edge even during continuous high-speed runs. This grade is specifically designed to handle the abrasive nature of stainless while ensuring high-productivity tool life in stable conditions.

MS Chipbreaker Geometry

The MS (Medium-Sharp) chipbreaker is designed for finishing to light-medium cutting. For stainless steel, the MS geometry is critical for preventing "built-up edge" (BUE) and managing chip control in gummier materials. The sharp edge reduces cutting resistance, ensuring high-precision dimensions and an exceptional surface finish on your CNC lathe.

Recommended Cutting Parameters

Optimized for Stainless Steel (M-Class):

  • Cutting Speed (Vc): 120 - 220 m/min (390 - 720 SFM)
  • Feed Rate (f): 0.10 - 0.35 mm/rev (0.004 - 0.014 ipr)
  • Depth of Cut (ap): 0.5 - 3.0 mm

*Pro Tip: For high-speed applications, ensure abundant coolant flow to maximize the efficiency of the US7020 grade.*

Global Customer Feedback

⭐⭐⭐⭐⭐ "High Speed Reliability" - Tom J., USA
"Switched to US7020 for a high-volume stainless run. I was able to increase my SFM by 20% compared to my old grade without losing tool life."

⭐⭐⭐⭐⭐ "Mirror Finish" - Stefan K., Germany
"The MS chipbreaker is perfect for our 316 parts. Very low friction and the surface finish is top-tier. Authentic Mitsubishi quality."

⭐⭐⭐⭐ "Great Chip Control" - Kenji Y., Japan
"Consistent chip breaking even at lower depths of cut. Reduces downtime for chip clearing significantly."

⭐⭐⭐⭐⭐ "Economic & Strong" - Andrew L., Australia
"6 usable edges with WNMG and the toughness of US7020 is a winner for our job shop. Excellent price."

⭐⭐⭐⭐⭐ "Original Quality" - Marek P., Poland
"Always trust Japanese made inserts for our CNC production. Reliable tool life and fast shipping."

Technical Q&A

Q: When should I choose US7020 over US735?

A: Choose US7020 for stable, high-speed cutting. Choose US735 if you have unstable setups, interrupted cuts, or need extra toughness.

Q: Is this insert suitable for roughing?

A: The MS breaker is optimized for finishing to light-medium work. For heavy roughing, we recommend the MA or RM chipbreaker.

Q: How many cutting edges does it have?

A: WNMG is a double-sided trigon insert, giving you 6 usable edges per insert, making it very cost-effective.

Expert Machining Tip: Speed vs. Toughness

For High-Speed Production in stainless, US7020 is your top choice. If your priority is toughness against edge chipping in difficult materials, US735 is the better alternative.

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.