Mitsubishi WNMG080408-MM MC7025 Stainless Steel Turning Carbide Inserts (10pcs) - BEYOND

Mitsubishi WNMG080408-MM MC7025 Stainless Steel Turning Carbide Inserts (10pcs)

$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-MM MC7025

Professional Stainless Steel Specialist | MM Medium Chipbreaker | Made in Japan

Product Overview

The Mitsubishi WNMG080408-MM MC7025 is a high-performance double-sided 80° trigon negative insert precision-engineered for Stainless Steel turning. Featuring the revolutionary MC7025 CVD coating, this insert provides superior heat resistance and prevents built-up edge (BUE) which is common in austenitic stainless steels. The MM chipbreaker is the gold standard for medium cutting, making this indexable carbide insert the top choice for CNC machining shops requiring high reliability and exceptional surface finishes on 304, 316, and duplex 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
MM
Med. Stainless

Technical Specifications: Metric vs. Imperial

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

Advanced Grade: MC7025 (The Stainless Expert)

The MC7025 grade uses a specialized CVD coating designed for the unique challenges of machining stainless steel. Its smooth surface reduces friction, which drastically lowers the heat generated at the cutting tip. This prevents the stainless steel from hardening or sticking to the insert, resulting in a longer tool life and stable precision machining even in high-speed applications.

MM Chipbreaker Geometry

The MM (Medium) chipbreaker is specifically optimized for stainless steel. It features a unique groove shape that handles the high elasticity of stainless steel, forcing chips to break efficiently. In the CNC turning process, this geometry provides a perfect balance between cutting edge sharpness and toughness, ideal for general-purpose medium cutting.

Recommended Cutting Parameters

Optimized for Stainless Steel (M-Class):

  • Cutting Speed (Vc): 100 - 220 m/min (330 - 720 SFM)
  • Feed Rate (f): 0.15 - 0.40 mm/rev (0.006 - 0.016 ipr)
  • Depth of Cut (ap): 0.5 - 3.5 mm

*Pro Tip: Ensure constant coolant flow to keep temperatures stable and prolong the CVD coating life.*

Compatible Tool Holders:

Shop MWLNR / DWLNR 08 Holders

Global Verified Customer Feedback

⭐⭐⭐⭐⭐ "Stainless Steel Solution" - Sarah J., USA
"We were struggling with built-up edge on 316 stainless. Switched to MC7025 and the finish is night and day. Highly recommend."

⭐⭐⭐⭐⭐ "Predictable Wear" - Guillaume L., France
"Very reliable grade. The MM breaker handles the long chips of 304 stainless perfectly. Original Japanese quality."

⭐⭐⭐⭐ "Great Consistency" - Kenji O., Japan
"Consistently high quality. MC7025 is our standard for all stainless turning jobs in the CNC shop."

⭐⭐⭐⭐⭐ "6 Edges is the Best" - David B., UK
"The trigon shape gives us more edges than CNMG. Great value for high-volume stainless production."

⭐⭐⭐⭐⭐ "Quick Delivery" - Andres V., Spain
"Received authentic Mitsubishi boxes. These inserts perform exactly as expected in tough duplex steels."

Technical Q&A

Q: Is MC7025 suitable for Alloy Steel?

A: MC7025 is optimized for Stainless Steel (M-Class). For general steel turning, UE6110 or MC6025 is recommended for better cost-efficiency.

Q: What is the benefit of the MM chipbreaker?

A: The MM breaker is designed to efficiently break the tough, stringy chips characteristic of stainless steel, ensuring a smooth CNC machining process.

Q: How many cutting edges are on this insert?

A: WNMG is a double-sided trigon, providing a total of 6 usable cutting edges, making it significantly more economical than CNMG.

Expert Machining Tip: MC7025 vs US735

For Stable High-Speed Stainless turning, MC7025 is superior. If you are doing Heavy Interrupted Cuts or working at low speeds, consider the US735 PVD grade for higher toughness.

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.