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Tungaloy CNMG120408-TM T9125 CVD Coated Carbide Turning Insert - BEYOND

Tungaloy CNMG120408-TM T9125 CVD Coated Carbide Turning Insert

$82.76 USD
Tungaloy CNMG120408-TM T9125 Turning Insert Reliable Steel Machining | Premium CVD T9125 | Made in Japan What is the most versatile carbide grade for general steel turning applications? The Tungaloy...
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Tungaloy CNMG120408-TH T9125 Heavy Interrupted Turning Insert

Tungaloy CNMG120408-TH T9125 Heavy Interrupted Turning Insert

$82.76 USD
Tungaloy CNMG120408-TH T9125 Turning Insert Maximum Edge Toughness | Premium CVD T9125 | Made in Japan What is the best carbide insert for heavy interrupted steel cutting? The Tungaloy CNMG120408-TH...
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Tungaloy CNMG120404-TM T9125 CVD Coated Carbide Turning Insert - BEYOND

Tungaloy CNMG120404-TM T9125 CVD Coated Carbide Turning Insert

$82.76 USD
Tungaloy CNMG120404-TM T9125 Turning Insert Reliable Steel Machining | Premium CVD T9125 Grade | Made in Japan What is the most versatile carbide insert for general steel turning? The Tungaloy...
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Tungaloy CNMG120404R-S T9125 Right-Hand CVD Coated Turning Insert for Steel - BEYOND

Tungaloy CNMG120404R-S T9125 Right-Hand CVD Coated Turning Insert for Steel

$82.76 USD
Tungaloy CNMG120404R-S T9125 Turning Insert High-Efficiency Right-Hand Turning | CVD Coated T9125 | Made in Japan How do I achieve stable tool life in high-speed steel turning? The Tungaloy CNMG120404R-S...
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Tungaloy CNMG120404L-S T9125 Left-Hand CVD Coated Turning Insert for Steel - BEYOND

Tungaloy CNMG120404L-S T9125 Left-Hand CVD Coated Turning Insert for Steel

$82.76 USD
Tungaloy CNMG120404L-S T9125 Turning Insert Professional Left-Hand Steel Turning | CVD Coated T9125 | Made in Japan What is the best left-hand insert for stable steel turning? The Tungaloy CNMG120404L-S...
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Tungaloy CNMG120408-TM T9115 CVD Coated Carbide Turning Insert for Steel - BEYOND

Tungaloy CNMG120408-TM T9115 CVD Coated Carbide Turning Insert for Steel

$82.76 USD
Tungaloy CNMG120408-TM T9115 Turning Insert High-Speed Steel Machining | Premium CVD T9115 | Made in Japan How do I maximize productivity in high-speed CNC steel turning? The Tungaloy CNMG120408-TM T9115...
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Tungaloy CNMG120404-TM T9115 CVD Coated Carbide Turning Insert for Steel - BEYOND

Tungaloy CNMG120404-TM T9115 CVD Coated Carbide Turning Insert for Steel

$82.76 USD
Tungaloy CNMG120404-TM T9115 Turning Insert High-Speed Steel Machining | Premium CVD T9115 | Made in Japan What is the most wear-resistant insert for high-speed steel turning? The Tungaloy CNMG120404-TM T9115...
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Tungaloy CNMG120408-SM AH725 PVD Coated Carbide Turning Insert - BEYOND

Tungaloy CNMG120408-SM AH725 PVD Coated Carbide Turning Insert

$73.56 USD
Tungaloy CNMG120408-SM AH725 Turning Insert Universal Stainless Steel Expert | PVD Coated AH725 | Made in Japan What is the most reliable carbide grade for machining stainless steel and superalloys?...
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Tungaloy CNMG120404-SM AH725 PVD Coated Carbide Turning Insert - BEYOND

Tungaloy CNMG120404-SM AH725 PVD Coated Carbide Turning Insert

$73.56 USD
Tungaloy CNMG120404-SM AH725 Turning Insert Universal Stainless Steel Turning | PVD Coated AH725 | Made in Japan What is the best carbide grade for machining difficult-to-cut stainless steel? The Tungaloy...
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Tungaloy CNMG120408-TS NS9530 Cermet Turning Insert for Precision Steel Finishing - BEYOND

Tungaloy CNMG120408-TS NS9530 Cermet Turning Insert for Precision Steel Finishing

$47.13 USD
Tungaloy CNMG120408-TS NS9530 Turning Insert High-Speed Steel Finishing | Premium NS9530 Cermet Grade | Made in Japan How do I get a mirror finish on steel parts with high-speed turning?...
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Tungaloy CNMG120408-37 NS9530 Cermet Turning Insert for Steel Finishing - BEYOND

Tungaloy CNMG120408-37 NS9530 Cermet Turning Insert for Steel Finishing

$48.28 USD
Tungaloy CNMG120408-37 NS9530 Cermet Insert High-Gloss Steel Finishing | NS9530 Cermet Technology | Precision Japan Tooling Which insert gives the best surface finish on carbon steel? The Tungaloy CNMG120408-37 NS9530...
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Tungaloy CNMG120404-TS NS9530 Cermet Turning Insert for Steel Finishing - BEYOND

Tungaloy CNMG120404-TS NS9530 Cermet Turning Insert for Steel Finishing

$47.13 USD
Tungaloy CNMG120404-TS NS9530 Turning Insert High-Precision Steel Finishing | Premium NS9530 Cermet | Made in Japan How do I achieve a mirror finish in steel turning? The Tungaloy CNMG120404-TS NS9530...
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Tungaloy CNMG120404R-S NS9530 Right-Hand Cermet Turning Insert for Steel - BEYOND

Tungaloy CNMG120404R-S NS9530 Right-Hand Cermet Turning Insert for Steel

$48.28 USD
Tungaloy CNMG120404R-S NS9530 Cermet Insert Precision Right-Hand Finishing | NS9530 Cermet Grade | Made in Japan What is the best cermet insert for high-gloss steel finishing? The Tungaloy CNMG120404R-S NS9530...
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Tungaloy CNMG120404L-S NS9530 Cermet Turning Insert for Precision Finishing - BEYOND

Tungaloy CNMG120404L-S NS9530 Cermet Turning Insert for Precision Finishing

$48.28 USD
Tungaloy CNMG120404L-S NS9530 Cermet Insert Mirror Surface Finishing | Left-Hand Orientation | Japan Precision Cermet Why is the NS9530 grade superior for high-gloss steel finishing? The Tungaloy CNMG120404L-S NS9530 is...
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Tungaloy CNMG120404-37 NS9530 Cermet Turning Insert for Finishing Steel - BEYOND

Tungaloy CNMG120404-37 NS9530 Cermet Turning Insert for Finishing Steel

$48.28 USD
Tungaloy CNMG120404-37 NS9530 Cermet Insert Ultimate Surface Finish | NS9530 Cermet Grade | Precision Made in Japan Why should I use Cermet NS9530 for finishing steel parts? The Tungaloy CNMG120404-37...
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Tungaloy CNGA120408 LX11 Ceramic Turning Insert for Hardened Steel - BEYOND

Tungaloy CNGA120408 LX11 Ceramic Turning Insert for Hardened Steel

$128.74 USD
Tungaloy CNGA120408 LX11 Ceramic Turning Insert High-Speed Hard Part Turning | Alumina-based Ceramic | Made in Japan What is the best insert for machining hardened steel above 50 HRC? The...
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Tungaloy CNMG190612-TM T9125 Heavy-Duty CVD Coated Carbide Turning Insert

Tungaloy CNMG190612-TM T9125 Heavy-Duty CVD Coated Carbide Turning Insert

$182.17 USD
Tungaloy CNMG190612-TM T9125 Turning Insert High-Performance Heavy Machining | Premium CVD T9125 | Made in Japan What is the most stable insert for heavy-duty steel turning on large CNC lathes?...
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Tungaloy CNMG190612-THS T9125 Heavy Interrupted Turning Insert

Tungaloy CNMG190612-THS T9125 Heavy Interrupted Turning Insert

$177.57 USD
Tungaloy CNMG190612-THS T9125 Turning Insert Maximum Impact Resistance | Premium CVD T9125 | Made in Japan What is the best insert for extreme interrupted roughing in steel? The Tungaloy CNMG190612-THS...
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Tungaloy CNMG190612-TH T9125 Heavy-Duty Interrupted Turning Insert

Tungaloy CNMG190612-TH T9125 Heavy-Duty Interrupted Turning Insert

$179.87 USD
Tungaloy CNMG190612-TH T9125 Turning Insert Extreme Roughing Stability | Premium CVD T9125 | Made in Japan What is the strongest insert for extra-heavy interrupted cutting? The Tungaloy CNMG190612-TH T9125 is...
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Tungaloy CNMG190608-TM T9125 Heavy-Duty CVD Coated Carbide Turning Insert

Tungaloy CNMG190608-TM T9125 Heavy-Duty CVD Coated Carbide Turning Insert

$182.17 USD
Tungaloy CNMG190608-TM T9125 Turning Insert Heavy-Duty Steel Machining | Premium CVD T9125 Grade | Made in Japan What is the most reliable insert for heavy-duty steel turning on large CNC...
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Tungaloy CNMG160612 T9125 CVD Coated Carbide Turning Insert for Steel - BEYOND

Tungaloy CNMG160612 T9125 CVD Coated Carbide Turning Insert for Steel

$114.52 USD
Tungaloy CNMG160612 T9125 Turning Insert Heavy-Duty Steel Turning | Robust 1.2mm Radius | Premium CVD T9125 Grade Why is T9125 the most reliable grade for interrupted steel cuts? The Tungaloy...
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Tungaloy CNMG160608 T9125 CVD Coated Carbide Turning Insert for Steel - BEYOND

Tungaloy CNMG160608 T9125 CVD Coated Carbide Turning Insert for Steel

$114.52 USD
Tungaloy CNMG160608 T9125 Turning Insert The Ultimate Steel Turning Solution | CVD Coated T9125 Grade | Made in Japan What is the best carbide grade for medium speed steel turning?...
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Tungaloy CNMG120416-TH T9125 Heavy-Duty CVD Coated Turning Insert

Tungaloy CNMG120416-TH T9125 Heavy-Duty CVD Coated Turning Insert

$82.76 USD
Tungaloy CNMG120416-TH T9125 Turning Insert Extreme Edge Strength | Premium CVD T9125 Grade | Made in Japan What is the best insert for heavy roughing and interrupted cuts in steel?...
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Tungaloy CNMG120412-TH T9125 Heavy Interrupted Turning Insert

Tungaloy CNMG120412-TH T9125 Heavy Interrupted Turning Insert

$82.76 USD
Tungaloy CNMG120412-TH T9125 Turning Insert Maximum Edge Stability | Premium CVD T9125 | Made in Japan What is the most durable carbide insert for heavy interrupted cuts in steel? The...
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Tungaloy CNMG120408R-S T9125 Right-Hand CVD Coated Turning Insert - BEYOND

Tungaloy CNMG120408R-S T9125 Right-Hand CVD Coated Turning Insert

$82.76 USD
Tungaloy CNMG120408R-S T9125 Turning Insert High-Performance Right-Hand Turning | Premium CVD T9125 Grade | Made in Japan What is the best right-hand insert for stable steel turning at high speeds?...
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Tungaloy CNMG120408L-S T9125 Left-Hand CVD Carbide Turning Insert - BEYOND

Tungaloy CNMG120408L-S T9125 Left-Hand CVD Carbide Turning Insert

$82.76 USD
Tungaloy CNMG120408L-S T9125 Turning Insert High-Performance Left-Hand Turning | Premium CVD T9125 Grade | Made in Japan How can I improve tool life when turning alloy steel with left-hand tools?...
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Tungaloy CNMG160612 T9115 CVD Coated Carbide Turning Insert for Steel - BEYOND

Tungaloy CNMG160612 T9115 CVD Coated Carbide Turning Insert for Steel

$114.52 USD
Tungaloy CNMG160612 T9115 Turning Insert High-Speed Steel Specialist | Robust 1.2mm Radius | Premium CVD Coating How does the 1.2mm radius on T9115 improve stability in heavy steel turning? The...
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Tungaloy CNMG160608 T9115 CVD Coated Carbide Turning Insert for Steel - BEYOND

Tungaloy CNMG160608 T9115 CVD Coated Carbide Turning Insert for Steel

$114.52 USD
Tungaloy CNMG160608 T9115 Turning Insert High-Speed Steel Specialist | CVD Coated Durability | Japan Precision Tooling What makes T9115 the best grade for high-speed steel turning? The Tungaloy CNMG160608 T9115...
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Tungaloy CNMG120412-TM T9115 CVD Coated Carbide Turning Insert for Steel - BEYOND

Tungaloy CNMG120412-TM T9115 CVD Coated Carbide Turning Insert for Steel

$82.76 USD
Tungaloy CNMG120412-TM T9115 Turning Insert High-Efficiency Steel Turning | Premium CVD T9115 | Made in Japan What is the best 1.2mm radius insert for high-speed steel turning? The Tungaloy CNMG120412-TM...
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Tungaloy CN Series 80° Diamond Negative Inserts | CNMG CNMA Turning

Tungaloy CN 80° Diamond Negative Inserts

Double-Sided 8-Edge Economy | Heavy Roughing | PremiumTec CVD Technology

Which insert offers the best balance of tool life and cost-per-edge for heavy-duty steel turning?

The Tungaloy CN Series (including CNMG and CNMA) is the backbone of industrial turning operations. Featuring an 80° diamond shape, these negative inserts provide 8 usable cutting edges (4 per side), making them the most economical choice for heavy roughing to medium finishing. Engineered with Tungaloy's T9200 series CVD coating, these inserts excel in high-speed dry machining of carbon steels. For challenging stainless steel or high-temp alloys, the AH725 PVD grade offers superior edge toughness. Our signature -TM (Medium Roughing) and -TH (Heavy Duty) chipbreakers are specifically designed to manage thick chips and reduce crater wear under high feed rates.

Decoding Tungaloy CN Series ISO Codes

C
80° Diamond
N
Negative 0°
M / A
Tolerance
G
With Hole
12
Size (mm)
04
Thickness
08 / 12
Radius

8 Cutting Edges

Double-sided negative geometry provides double the tool life compared to positive inserts, significantly lowering production costs.

PremiumTec Finish

Unique post-coating surface treatment smooths the cutting edge to reduce friction and prevent built-up edge (BUE).

High Feed Roughing

The 80° included angle offers maximum tip strength for high-impact interrupted cuts and heavy scale removal.

Size Reference: Metric vs. Imperial

ISO Model ANSI Model Inscribed Circle Machining Type
CNMG 120408-TM CNMG 432-TM 12.7 mm General Purpose Steel
CNMG 120412-TH CNMG 433-TH 12.7 mm Heavy Interrupted Cut
CNMG 190612-PR CNMG 643-PR 19.05 mm Extra Heavy Roughing

Industrial Machining Parameters

Carbon Steel (P-Class / T9215) Vc: 200 - 450 m/min | f: 0.2 - 0.6 mm/rev
Stainless Steel (M-Class / AH725) Vc: 120 - 250 m/min | f: 0.15 - 0.4 mm/rev

Required Tool Holders

Compatible with MCLNR/L, PCLNR/L, and DCLNR/L Turning Holders

Shop Authentic Tungaloy Tool Holders

Common Applications

  • Heavy-duty roughing of forged steel components.
  • Large diameter turning of pipe and valve bodies.
  • High-speed finishing of automotive axles.
  • Interrupted cutting of cast iron housings.

Machine Compatibility

Optimized for 40-50 taper high-rigidity lathes (Mazak, Okuma, DMG Mori, Doosan) and heavy-duty manual lathes. Supports high-pressure coolant systems.

Tungaloy CN Grade Selection Guide

Grade Coating Best Use Case
T9215 CVD Primary choice for mass production steel turning. High wear resistance.
AH725 PVD Tough grade for stainless steel and unstable machining conditions.
T5115 CVD Optimized for high-speed machining of Grey and Ductile Cast Iron.

The BEYOND CNC Standard

Factory Sealed
100% Genuine Tungaloy Japan
Bulk Export
Ready for Global B2B Supply
Director Support
Expert Machining Consulting

International Shop Reports

⭐⭐⭐⭐⭐ "Economy King" - Mark T., USA
"Switching to CNMG double-sided saved our shop 25% on tooling costs this quarter. T9215 handles our forging skins with zero issues."

⭐⭐⭐⭐⭐ "Stable in Stainless" - Gerhardt M., Germany
"AH725 grade CNMG is incredibly stable. Even with interrupted cuts on 316L, the edge holds up for hundreds of parts."

⭐⭐⭐⭐⭐ "Fast Shipping" - C. Moretti, Italy
"BEYOND CNC is our go-to for Tungaloy. Genuine products and the technical director helped us optimize our feed rates."

Technical FAQ

Q: What is the difference between CNMG and CNMA?

A: CNMG features a chipbreaker for chip control in steel and stainless. CNMA has a flat top (no chipbreaker) and is primarily used for cast iron or hard turning where no chip control is needed.

Q: Can I use CNMG for finishing?

A: Yes, if you select a finishing chipbreaker like **-TSF**. However, for extreme precision and low cutting force, a positive CC or DC insert may be better.

Tech Tip: Maximizing 8-Edge Utility

When using **CN Series** inserts, ensure your shim/seat is clean. A double-sided negative insert requires a flat, clean surface to maintain the integrity of the unused edges on the bottom. **BEYOND CNC** - Excellence in Tooling.

© Technical Document by Beyond Li - CNC Tooling Technical Director