Tungaloy WNMG080408-TM T9125 Turning Insert | CVD Carbide for Steel Machining
WNMG080404-TS T9125 (10pcs)
Tungaloy WNMG080404-TM T9125 Turning Insert | CVD Carbide for Steel Machining
Tungaloy WNMG060412E-TM T9125 Carbide Turning Insert for Steel
WNMG060408-TM T9125 (10pcs)
Tungaloy WNMG060408E-TM T9125 Carbide Turning Insert for Steel
Tungaloy WNMG060404-TM T9125 Turning Insert | CVD Carbide for Steel Machining
Tungaloy WN 80° Trigon Negative Inserts — WNMG 6-Edge Economy Steel Turning
Genuine Tungaloy WN 80° trigon negative inserts deliver the economy of 6 usable cutting edges per insert with the strength of a square (SN) insert and the versatility of a triangular (TN) point. The WN geometry is purpose-built for medium-to-heavy steel turning where cost-per-edge matters as much as tool life.
This catalog covers 31 genuine Tungaloy SKUs across IC 9.525 mm (WNMG 06) and IC 12.7 mm (WNMG 08) sizes, with seven grade families: T9115, T9125, T9135, T9215 (CVD steel), AH725, MPJ350 (PVD stainless), and NS9530 (cermet finishing).
Browse the full Tungaloy WN 80° trigon negative catalog, or jump to: CVD T9115 · CVD T9125 · CVD T9135/T9215 · PVD Stainless · Cermet NS9530.
About Tungaloy WN 80° Trigon Negative Inserts
The WN 80° trigon negative geometry combines the best of two worlds: 6 usable cutting edges per insert (vs 4 for rhombic or 3 for triangular) with strong negative-rake edge support similar to a square insert. The 80° point angle provides a balance between cutting-edge strength and profile versatility — making WN inserts the economy workhorse for high-volume CNC turning on steel and stainless components.
Key advantages of the WN geometry:
- 6 edges per insert — 50% more edges than rhombic CN/DN inserts and 100% more than triangular TN inserts, lowering cost-per-edge significantly
- Strong negative-rake edge — handles interrupted cuts and tough steel better than positive-rake geometries
- 80° point angle — versatile for both profiling and longitudinal turning without the cutting-force penalty of 35° VN or 55° DN
- Two IC sizes — WNMG 06 (9.525 mm) for small parts, WNMG 08 (12.7 mm) for heavy roughing
Tungaloy (Iwate, Japan — IMC Group) supplies the WN family in WNMG (molded chipbreaker) geometry with seven grade families:
- T9115 (CVD P-grade) — 8 SKUs for steel at moderate-to-high speeds
- T9125 (CVD M-K-grade) — 11 SKUs for tough steel, interrupted cuts, and heavy roughing
- T9135 (CVD high-speed) — 3 SKUs for high-speed steel finishing
- T9215 (CVD P-grade alternative) — 1 SKU for steel semi-finishing
- AH725 (PVD universal stainless) — 2 SKUs for stainless 304/316
- MPJ350 (PVD stainless finishing) — 1 SKU for stainless finishing
- NS9530 (cermet) — 4 SKUs for high-finish steel profiling
Featured Genuine Tungaloy WN Inserts
Twelve workhorse selections drawn from our 31-SKU Tungaloy WN catalog — covering the most-requested grade + chipbreaker combinations for steel, stainless, and cermet work.
WNMG080408-TM T9115 — Steel Workhorse
CVD P-grade with 0.8 mm corner radius for medium steel turning. The most versatile WN option for general-purpose work.
WNMG080412-TM T9115 — Heavy Steel
T9115 CVD with 1.2 mm corner radius for heavy steel cutting at high feed. TM balances wear + chip control.
WNMG080404-TM T9115 — Sharp Steel
Sharp 0.4 mm corner radius for steel finishing. T9115 wear resistance extends life at sharp edge geometry.
WNMG080408-TM T9125 — Tough Steel
T9125 CVD with tougher substrate for steel with light interruptions. Better edge security than T9115 in tough conditions.
WNMG080412-TM T9125 — Heavy Tough Steel
T9125 with 1.2 mm corner radius for heavy roughing on tough steel and forging-skin surfaces.
WNMG080412-TH T9125 — PVD Semi-Finish
PVD-coated T9125 with TH chipbreaker for steel semi-finishing and roughing. Excellent chip control at higher feeds.
WNMG080416-TH T9125 — Heavy Roughing
PVD T9125 with 1.6 mm corner radius for heavy steel roughing at high depths-of-cut. TH chipbreaker for stable chip flow.
WNMG080416-THS T9125 — Severe Interrupted
T9125 with THS (heavy severe) chipbreaker for the toughest interrupted-cut conditions. Best edge security for forged surfaces.
WNMG080408-TM T9135 — High-Speed Steel
T9135 CVD optimized for high-speed steel turning. Improved thermal stability for higher Vc operations.
WNMG080408-SM AH725 — Stainless Universal
PVD Al-rich grade for stainless 304/316, duplex, and high-Ni alloys. SM chipbreaker controls chip flow.
WNMG080404-SS MPJ350 — Stainless Finish
PVD MPJ350 with SS chipbreaker for stainless finishing. Sharp edge delivers Ra 0.4-0.8 µm on 304/316 stainless.
WNMG080408-TS NS9530 — Cermet Finish
Cermet grade with sharp TS chipbreaker for high-finish steel profiling. Achieves mirror finishes at low speeds.
View All 31 Tungaloy WN Inserts →
All Categories — Organized by Grade Family
CVD T9115 — Steel Workhorse (8 SKUs)
Tungaloy's CVD-coated P-grade for general steel turning at moderate-to-high cutting speeds. Wear-resistant for finishing-to-medium roughing on carbon and alloy steels.
- WNMG080408-TM T9115 (0.8 mm radius) — most versatile WN steel workhorse
- WNMG080412-TM T9115 (1.2 mm radius) — heavy steel cutting
- WNMG080404-TM T9115 (0.4 mm radius) — steel finishing
- WNMG080408-TS T9115 (TS sharp) — steel finishing precision
- WNMG080408-TSF T9115 (TSF PVD sharp) — steel + stainless finishing
- WNMG080404-TSF T9115 (TSF sharp PVD) — sharp steel + stainless
- WNMG060408-TM T9115 (small IC 06 size) — small part steel turning
CVD T9125 — Tough Steel (11 SKUs)
Tungaloy's CVD M-K-grade with tougher substrate for steel with light interruptions, forging-skin surfaces, and general-purpose stability. The most versatile WN grade in our catalog.
- WNMG080408-TM T9125 — general-purpose tough steel
- WNMG080412-TM T9125 — heavy tough steel
- WNMG080404-TM T9125 — sharp tough steel
- WNMG080408-TH T9125 (TH PVD) — steel semi-finishing
- WNMG080412-TH T9125 (TH PVD) — heavy semi-finishing
- WNMG080416-TH T9125 (TH PVD, 1.6 mm radius) — heavy roughing
- WNMG080416-THS T9125 (THS severe) — severe interrupted cuts
- WNMG060404-TM T9125 — small IC tough steel
- WNMG060408E-TM T9125 (E-edge treatment) — small IC with edge prep
- WNMG060412E-TM T9125 (E-edge) — small IC heavy tough steel
CVD T9135 / T9215 — High-Speed Steel (4 SKUs)
T9135 is Tungaloy's high-speed steel grade with improved thermal stability. T9215 is an alternative P-grade for steel semi-finishing.
- T9135 (3 SKUs): WNMG080404-TM, WNMG080408-TM, WNMG080412-TM — high-speed steel turning
- T9215 (1 SKU): WNMG080408-TH — steel semi-finishing alternative
PVD Stainless — AH725 / MPJ350 (3 SKUs)
PVD-coated grades for stainless steel work. AH725 is the universal stainless choice; MPJ350 is specialized for finishing.
- AH725 (2 SKUs): WNMG080408-SM, WNMG080404-SM — stainless 304/316 universal
- MPJ350 (1 SKU): WNMG080404-SS — stainless finishing
Cermet NS9530 — High-Finish Steel (4 SKUs)
TiC/TiN cermet for high-surface-finish steel turning at low-to-medium cutting speeds. Achieves Ra 0.4-0.8 µm on carbon and alloy steels.
- NS9530 (4 SKUs): WNMG080408-TS, WNMG080408-37, WNMG080404-TS, WNMG080404-37 — cermet finishing
Tungaloy WN vs Mitsubishi WNMG — Grade Comparison
Cross-reference table for machinists familiar with the Mitsubishi WNMG family.
| Material | Tungaloy Grade | Coating | Typical Chipbreaker | Mitsubishi Equivalent | Best Application |
|---|---|---|---|---|---|
| Steel (P) | T9115 | CVD TiCN/Al₂O₃ | TM / TS / TSF | US7020 / UE6010 | Steel workhorse, high-speed continuous |
| Steel (P) | T9125 | CVD TiCN/Al₂O₃ | TM / TH / THS | US7020 / UE6035 | Tough steel, interrupted cuts, roughing |
| Steel (P) | T9135 | CVD high-speed | TM | UE6035 | High-speed steel turning |
| Stainless (M) | AH725 | PVD Al-rich | SM | US7020 / VP15TF | Stainless universal |
| Stainless (M) | MPJ350 | PVD TiAlN | SS | MC7020 / VP15TF | Stainless finishing |
| Cermet | NS9530 | TiC/TiN cermet | TS / 37 | AP25N / RP202 | Steel finishing Ra 0.4-0.8 µm |
For the Mitsubishi equivalent family, see Mitsubishi CNMG / DNMG / VNMG / WNMG Negative Turning Inserts.
How to Choose the Right Tungaloy WN Insert
Selecting the correct WN 80° trigon insert involves four decisions:
- Material → Grade family: Steel → T9115 (P) / T9125 (M-K) / T9135 (high-speed). Stainless → AH725 / MPJ350. Cermet finishing → NS9530.
- Edge security → Chipbreaker: Stable setups → TM. Severe interruptions → THS. Semi-finishing → TH. Sharp finishing → TS / TSF.
- IC size → Tool holder compatibility: WNMG 06 (9.525 mm) fits 16 mm seats. WNMG 08 (12.7 mm) fits 22 mm seats for heavier holders.
- Corner radius → Operation: 0.4 mm radius for finishing, 0.8 mm for general turning, 1.2 mm for heavy roughing, 1.6 mm for heaviest roughing.
Tip: For general steel work, start with WNMG080408-TM T9125. For stainless, start with WNMG080408-SM AH725. For high-finish steel profiling, use WNMG080408-TS NS9530 cermet.
Frequently Asked Questions
What is the WN 80° trigon geometry and why does it have 6 cutting edges?
The WN 80° trigon is a triangular-shaped insert with the geometry rotated 30° from a standard TN triangle. This rotation creates a trigon (three-sided) shape with rounded corners that provides 6 usable cutting edges per insert — compared to 3 edges on TN triangles and 4 edges on CN/DN rhombic shapes. The trigon shape is a hybrid that combines the economy of multiple edges with strong negative-rake edge support.
How does T9125 compare to T9115?
Tungaloy's two CVD-coated steel grades differ in substrate and coating thickness. T9115 is the P-grade (P10-P25) optimized for wear resistance at higher cutting speeds on stable setups. T9125 is the M-K-grade (P20-P35) with a tougher substrate and thicker coating for better edge security on interrupted cuts, forging-skin surfaces, and stainless work. Choose T9115 for productivity on stable steel turning; choose T9125 for tough conditions or general-purpose flexibility.
What is the difference between TH and THS chipbreakers?
Both are PVD-coated chipbreakers for steel roughing. TH (Technical Heavy) is for semi-finishing and roughing with stable chip flow at higher feeds. THS (Technical Heavy Severe) is a more robust chipbreaker designed for severe interrupted cuts, forging-skin surfaces, and tough steel applications where edge chipping is a concern. THS has a stronger cutting edge preparation but at slightly higher cutting forces.
What does the "E" in WNMG060408E-TM mean?
The "E" designation refers to a specific edge preparation (honing/rounding) applied to the cutting edge. E-edge inserts have a controlled hone that increases edge security and prevents premature chipping under load — making them suitable for heavier roughing operations on tougher materials. E-edge is a standard Tungaloy designation that does not affect insert geometry or compatibility, only edge preparation.
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 and inconsistent quality.
What tool holder do I need for WN inserts?
WN 80° trigon inserts (IC 9.525 mm or 12.7 mm) fit negative-rake tool holders designed for the trigon shape. Common holders include Tungaloy PWLNR/L and MWLNR/L series for external turning. For WNMG 06 size, use MWLNR/L 06 holders; for WNMG 08 size, use PWLNR/L 08 holders. Browse our turning tool holder catalog for compatible options or contact us for holder recommendations.
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Related Tungaloy & Mitsubishi Negative Insert Catalogs
Tungaloy SN 90° Square Negative
Strongest negative geometry for heavy roughing. SNMG/SNMM with 4 edges per insert — pairs with WN for cost-effective roughing.
Tungaloy TN 60° Triangle Negative
Workhorse 60° triangle negative. TNMG/TNGG/TNGA — 55 SKUs across 10 grade families.
Tungaloy DN 55° Diamond Negative
55° diamond negative for profiling with stronger edge. DNMG/DNMA pairs with WN for finishing+roughing workflows.
Tungaloy CN 80° Round Negative
80° round negative for heavy roughing on tough materials. CNMG/CNMA often used alongside WN inserts.
Mitsubishi CNMG / DNMG / VNMG / WNMG Negative
Mitsubishi cross-brand equivalent — full negative turning family with US7020/UE6020 grades.
Turning Tool Holders — PWLNR / MWLNR
External turning tool holders compatible with WN 80° trigon inserts. 16 mm and 22 mm seat sizes.
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.