Tungaloy TNMG160408-TM T9125 CVD Coated Carbide Turning Insert for Steel Machining
Tungaloy TNMG160408R-S T9125 Right-Hand CVD Coated Carbide Turning Insert for Steel
Tungaloy TNMG160408L-S T9125 Left-Hand CVD Coated Carbide Turning Insert for Steel
Tungaloy TNMG160404R-S T9125 Right-Hand CVD Coated Carbide Turning Insert for Steel
Tungaloy TNMG160404L-S T9125 Left-Hand CVD Coated Carbide Turning Insert for Steel
Tungaloy TNMG160408-TS NS9530 Cermet Turning Insert for High-Surface Finish Steel
Tungaloy TNMG160408R-S NS9530 Right-Hand Cermet Turning Insert for Steel Finishing
Tungaloy TNMG160408-37 NS9530 Cermet Turning Insert for High-Speed Steel Finishing
Tungaloy TNMG160404R-S NS9530 Right-Hand Cermet Turning Insert for Steel Finishing
Tungaloy TN 60° Triangle Negative Inserts — TNMG, TNGG, TNGA Steel, Stainless & Cermet
Genuine Tungaloy TN 60° triangle negative inserts for medium-to-heavy turning on steel, stainless steel, cast iron, aluminum, and high-surface-finish cermet work. The 60° point geometry provides stronger cutting-edge strength than 55° diamond, ideal for roughing, profiling, and interrupted cuts on a wide range of CNC lathes.
This catalog covers 55 genuine Tungaloy SKUs across the TNMG (32), TNGG ground (22), and TNGA ceramic (1) families — covering IC 9.525 mm (1604/1608) and IC 12.7 mm (2204) inserts with chipbreakers TM, TS, SM, S, 37, 11, P, W, C, and grades T9115, T9125, T6130, AH725, T5115, TH10, GH110, GH330, NS9530, and LX11.
Browse the full Tungaloy TN 60° triangle negative catalog, or jump to a specific grade: CVD Steel · CVD Stainless · PVD Steel · Cermet · Aluminum · Ceramic · Cast Iron.
About Tungaloy TN 60° Triangle Negative Inserts
The TN 60° triangle negative geometry is one of the most versatile insert shapes in CNC turning. With three usable cutting edges per insert, a 60° point angle, and a negative rake that provides strong edge support, TN inserts balance productivity, edge strength, and versatility across steel, stainless, cast iron, and non-ferrous materials.
Tungaloy (Iwate, Japan — part of the IMC Group) supplies the TN family in three sub-designations:
- TNMG — the most popular TN style, with a molded chip-breaker pocket on top. 32 SKUs in stock cover steel, stainless, cast iron, and cermet work with chipbreakers TM / TS / SM / S / 37 / 11.
- TNGG — a ground TN insert with sharp edges and tighter tolerances. 22 SKUs specialize in aluminum (TH10), steel finishing (GH110/GH330), and cermet precision (NS9530 with P/W/C chipbreakers).
- TNGA — a ceramic TN insert without a chip-breaker pocket, designed for high-speed cast-iron finishing at elevated temperatures. 1 SKU stocked (LX11 grade).
Across all three families, our stock covers 10 grade families and 9 chip-breaker variants, giving you a genuine Tungaloy option for almost any 60°-triangle turning application — from heavy roughing on tough steel (T9115/T9125) to mirror-finish cermet finishing (NS9530 with W or C chipbreaker).
Featured Genuine Tungaloy TN Inserts
Twelve workhorse selections drawn from our 55-SKU Tungaloy TN catalog — covering the most-requested grade + chipbreaker combinations for steel, stainless, cermet, aluminum, cast iron, and ceramic applications.
TNMG160404-TM T9115 — Steel Workhorse
CVD-coated P-grade for general steel turning. Balanced wear + crater resistance for finishing-to-medium roughing at moderate speeds.
TNMG160408-TM T9125 — Heavy Steel
CVD-coated M-K grade with tougher substrate for steel interrupted cutting and forging-skin applications. Excellent edge security.
TNMG160408-SM AH725 — Stainless Universal
PVD-coated Al-rich grade for stainless 304/316, duplex, and high-Ni alloys. SM chipbreaker controls chip flow at positive feed rates.
TNMG160408-SM T6130 — CVD Stainless
CVD-coated stainless grade with thicker coating and higher wear resistance. Best for high-volume stainless production at higher speeds.
TNMG220408L-S T9125 — Large IC Heavy Duty
12.7 mm IC insert for heavy roughing at higher depths-of-cut on tough steel. Left-hand (L) chipbreaker for operator-side clearance.
TNMG160404-TS NS9530 — Cermet Steel Finishing
Cermet grade for high-surface-finish carbon steel at low-to-medium speeds. TS chipbreaker delivers sharp cutting edge for finishing.
TNMG160408-37 NS9530 — High-Speed Cermet
Cermet grade with 37 chipbreaker for high-speed steel finishing operations. Achieves Ra 0.4–0.8 µm on carbon and alloy steels.
TNGG160408L-P GH110 — Steel Finishing
Ground TN insert with PVD-coated GH110 grade. P chipbreaker + L hand for finishing carbon and alloy steels at high surface quality.
TNGG160404L-P TH10 — Aluminum
Uncoated ground TN for aluminum, copper, brass, and non-ferrous metals. Sharp edge prevents BUE (built-up edge) on soft materials.
TNMG160404 / TNMG160408 T5115 — Cast Iron Combo
CVD K-grade combo pack for cast iron and nodular iron at higher speeds. Covers both 04 and 08 corner-radius in a single SKU.
TNGA160404 / TNGA160408 LX11 — Ceramic
Ceramic SiAlON insert for high-speed cast iron finishing at 300–600 m/min. Combo pack covers 04 and 08 corner radius.
TNMG160412-TM T9115 — Heavy Steel Cutting
T9115 CVD with 1.2 mm corner radius for heavy steel roughing at high feed. TM chipbreaker balances wear + chip control.
View All 55 Tungaloy TN Inserts →
All Categories — Organized by Grade Family
The full 55-SKU Tungaloy TN catalog organized into 7 grade families. Each card links to its sub-collection.
CVD Steel (T9115, T9125, T5115) — 14 SKUs
CVD-coated grades for steel (T9115/T9125) and cast iron (T5115). Best wear + crater resistance for general turning at moderate-to-high speeds.
- T9115 (CVD P-grade, 3 SKUs): TNMG160404-TM, TNMG160408-TM, TNMG160412-TM — steel workhorse at moderate speeds and feeds.
- T9125 (CVD M-K-grade, 10 SKUs): TNMG160404-TM, TNMG160408-TM, TNMG160412-TM, TNMG160404R-S, TNMG160404L-S, TNMG160408R-S, TNMG160408L-S, TNMG220404R-S, TNMG220404L-S, TNMG220408L-S — heavy steel, interrupted cuts, and forging-skin applications.
- T5115 (CVD K-grade, 1 SKU): TNMG160404 / TNMG160408 combo — cast iron and nodular iron.
CVD Stainless (T6130) — 4 SKUs
Thick CVD coating optimized for austenitic and duplex stainless. Higher wear resistance for production stainless at elevated cutting parameters.
- T6130 (CVD M-grade, 4 SKUs): TNMG160404-SM, TNMG160408-SM, TNMG160404R-S, TNMG160408R-S — high-volume stainless production.
PVD Steel (AH725, GH110, GH330) — 10 SKUs
PVD-coated grades for stainless (AH725) and steel finishing (GH110, GH330). Sharper cutting edges than CVD with better surface finish.
- AH725 (PVD universal, 4 SKUs): TNMG160404-SM, TNMG160404-TM, TNMG160408-SM, TNMG160408-TM — stainless 304/316, duplex, high-Ni alloys.
- GH110 (PVD steel, 4 SKUs): TNGG160408R-P, TNGG160408L-P, TNGG160404R-P, TNGG160404L-P — finishing carbon and alloy steels.
- GH330 (PVD steel, 2 SKUs): TNGG160404R-P, TNGG160402R-P — finishing harder alloy steels and tool steels.
Cermet (NS9530) — 23 SKUs
TiC/TiN cermet grade for high-surface-finish carbon steel at low-to-medium speeds. Excellent wear life and chip control for finishing operations.
- NS9530 with TNMG (5 SKUs): TNMG160404-TS, TNMG160404-37, TNMG160404-11, TNMG160402-11, TNMG160408-TS, TNMG160408-37, TNMG160408R-S, TNMG160404R-S — finishing steel at Ra 0.4–0.8 µm.
- NS9530 with TNGG (18 SKUs, R/L hands): TNGG160408R/L with P/W/C chipbreakers, TNGG160404R/L with P/W/C chipbreakers, TNGG160402R/L with P/C chipbreakers — precision cermet finishing.
Aluminum (TH10) — 3 SKUs
Uncoated ground TNGG inserts with sharp cutting edges for non-ferrous metals. Prevents BUE (built-up edge) on aluminum, copper, and brass.
- TH10 (uncoated, 3 SKUs): TNGG160408R-P, TNGG160404R-P, TNGG160404L-P — aluminum, copper, brass, non-ferrous.
Ceramic (LX11) — 1 SKU
SiAlON ceramic insert for high-speed cast iron finishing at elevated temperatures (300–600 m/min). Excellent wear life on abrasive cast iron.
- LX11 (ceramic, 1 SKU): TNGA160404 / TNGA160408 combo pack.
Cast Iron (T5115) — see CVD Steel above
The T5115 CVD K-grade is the primary cast iron option in the TN family.
Tungaloy TN vs Mitsubishi TNMG — Grade Comparison
Cross-reference table for machinists familiar with the Mitsubishi TNMG family. Use this to translate Tungaloy grade selection to equivalent Mitsubishi grades.
| Material | Tungaloy Grade | Coating | Typical Chipbreaker | Mitsubishi Equivalent | Best Application |
|---|---|---|---|---|---|
| Steel (P) | T9115 | CVD TiCN/Al₂O₃ | TM | US7020 / UE6020 | Steel workhorse, finishing to medium roughing |
| Steel (P) | T9125 | CVD TiCN/Al₂O₃ | TM / S | US7020 / UE6035 | Heavy steel, interrupted cuts, forging skin |
| Stainless (M) | T6130 | CVD thick coating | SM | MC7020 | High-volume stainless production |
| Stainless (M) | AH725 | PVD Al-rich | SM / TM | US7020 / VP15TF | Stainless universal, duplex, high-Ni |
| Steel finishing | GH110 | PVD TiAlN | P | VP15TF | Steel finishing at high surface quality |
| Steel finishing | GH330 | PVD TiAlN | P | VP15TF / VP20MF | Harder alloy/tool steel finishing |
| Cast iron (K) | T5115 | CVD thick | (no chipbreaker) | UC6015 | Cast iron, nodular iron |
| Cermet | NS9530 | TiC/TiN cermet | TS / 37 / 11 / P / W / C | AP25N / RP202 | Steel finishing at Ra 0.4–0.8 µm |
| Aluminum (N) | TH10 | Uncoated | P | MD220 / US7020 | Aluminum, copper, brass, non-ferrous |
| Ceramic | LX11 | SiAlON | (no chipbreaker) | NX2525 | High-speed cast iron finishing |
For the Mitsubishi equivalent family, see Mitsubishi TNMG / TNMM 60° Triangle Negative.
How to Choose the Right Tungaloy TN Insert
Selecting the correct Tungaloy TN 60° triangle insert involves four decisions:
- Material → Grade family: Steel → T9115 / T9125 / GH110 / GH330 / NS9530 (cermet). Stainless → T6130 / AH725. Cast iron → T5115 / LX11. Aluminum → TH10.
- Operation → Chipbreaker: Finishing → TS / 11 / P. Medium → TM / S / 37. Roughing → S / TM with larger corner radius (08 or 12).
- IC size → Tool holder compatibility: IC 9.525 mm (1604/1608) fits standard 16 mm seat. IC 12.7 mm (2204) fits 22 mm seat for heavier-duty holders.
- Hand (R/L): Right-hand (R) inserts mount on the standard tool post for most lathe configurations. Left-hand (L) inserts are required for some Swiss-type and turret-style lathes.
Tip: When in doubt for general steel work, start with TNMG160408-TM T9125 as a reliable all-rounder. For stainless, start with TNMG160408-SM AH725.
Frequently Asked Questions
What is the difference between TNMG, TNGG, and TNGA inserts?
All three are 60° triangle negative inserts with the same IC dimensions, but they differ in edge geometry and intended use. TNMG has a molded chipbreaker pocket — the most common style for general turning. TNGG is ground on all surfaces for sharper edges and tighter tolerances, ideal for finishing, cermet, and aluminum work. TNGA is a ceramic insert without a chipbreaker, designed for high-speed cast iron finishing. Tungaloy stocks all three sub-designations in our catalog.
How do Tungaloy TN grades compare to Mitsubishi and Sandvik equivalents?
Tungaloy's CVD steel grades T9115 and T9125 are direct competitors to Mitsubishi's US7020 / UE6020 series and Sandvik's GC 4325 / GC 435. For stainless, Tungaloy T6130 and AH725 map roughly to Sandvik's GC 2025 and Mitsubishi's MC7020 / US7020. Tungaloy's cermet NS9530 is comparable to Mitsubishi's AP25N / RP202 cermet family. For exact ISO 1832 grade substitutions, request our complete grade cross-reference catalog.
What chipbreaker should I choose for finishing vs. roughing?
For finishing on steel at low feed (0.05–0.15 mm/rev), use TS (sharp) on TNMG or P on TNGG. For medium turning (0.15–0.30 mm/rev), use TM on TNMG with steel grades. For roughing (0.30+ mm/rev at deeper DOC), use S chipbreaker with larger corner radius (08 or 12). For stainless, use SM for general work. For cermet finishing, the 37 / 11 / W / C / P chipbreakers provide specialized chip control at low speeds.
Are these genuine Tungaloy inserts from Japan?
Yes — every insert in this catalog is 100% genuine Tungaloy from Iwate, Japan (part of the IMC Group). All SKUs are sourced directly through authorized distribution channels and include the original Tungaloy packaging and grade markings. Beware of counterfeit Tungaloy inserts sold at suspiciously low prices on marketplaces; these are typically substandard Chinese carbide with copied geometry.
What IC size (insert dimension) do I need for my tool holder?
The IC (inscribed circle) size determines tool holder compatibility. IC 9.525 mm (designated 1604 / 1608) fits standard 16 mm tool seats and is the most common size for CNC lathes. IC 12.7 mm (designated 2204) fits 22 mm seats for heavier-duty holders and roughing operations. Always verify your tool holder accepts the IC size before ordering — common holders include Tungaloy DCLNR/L, PCLNR/L, and MTJNR/L for the TNMG family. Browse our turning tool holder catalog for compatible options.
What is the difference between R and L hand designations?
Right-hand (R) and left-hand (L) designations refer to the cutting direction of the insert. R (right-hand) inserts are the standard for most lathe operations, with the cutting edge oriented for standard feed direction. L (left-hand) inserts are needed for some Swiss-type lathes, dual-direction turret configurations, or when an operator-side clearance is required. Within our Tungaloy TNGG cermet catalog, both R and L hands are stocked for most corner-radius + chipbreaker pairs to give you maximum flexibility.
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Related Tungaloy & Mitsubishi Negative Insert Catalogs
Tungaloy SN 90° Square Negative
The SN family is Tungaloy's strongest negative insert for heavy roughing. SNMG/SNMM 23 SKUs in stock with grades T9115/T9125/T9225/NS9530.
Tungaloy DC 55° Diamond Positive
DCMT/DCGT 55° diamond positive for profiling and finishing. The positive rake provides lower cutting forces on thin sections.
Mitsubishi TNMG / TNMM 60° Triangle Negative
The cross-brand equivalent — Mitsubishi TNMG with grades US7020/UE6020/UC6015/MC7020 for steel, stainless, and cast iron.
Mitsubishi CNMG 80° Round Negative
The round negative alternative for heavy roughing and profiling on tough materials. Often used alongside TN inserts.
Turning Tool Holders — DCLNR / PCLNR / MTJNR
External turning tool holders compatible with TN 60° negative inserts. 16 mm and 22 mm seat sizes stocked.
Sample Catalogs — Tungaloy & Mitsubishi
Free physical sample packs and grade cross-reference PDFs for qualified B2B inquiries.
All product names, grade designations, and chipbreaker designations are trademarks of Tungaloy (Iwate, Japan / IMC Group). This catalog is operated by cnchome-beyond.com — Super Industrial Trading Co., Ltd, Hangzhou, China.