Tungaloy WNMG080408-TSF T9115 Carbide Turning Insert – PVD Coated for Steel & Stainless
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Tungaloy WNMG080408-TSF T9115 Carbide Turning Insert – PVD Coated for Steel & Stainless Semi-Finishing
An 80° trigon carbide insert engineered for finishing to semi-finishing of carbon steel, alloy steel, and stainless steel. The R0.8 corner radius and TSF chipbreaker geometry deliver superior chip control and excellent surface finish at higher feed rates than the R0.4 variant.
Product Overview
"Which carbide insert is best for semi-finishing steel at moderate-to-high feed rates with good surface finish?"
The Tungaloy WNMG080408-TSF T9115 is a precision-ground, 80° trigon carbide turning insert optimized for finishing to semi-finishing operations on steel and stainless steel. Compared to the R0.4 variant, the R0.8 corner radius provides a stronger cutting edge, better chip thinning effect, and improved surface finish at higher feed rates — making it the preferred choice for medium-feed production turning where both productivity and finish quality matter.
The T9115 grade features a PVD TiAlN multi-layer coating over a fine-grain carbide substrate, delivering sharp cutting edges, low cutting forces, and excellent resistance to flank wear and oxidation at elevated temperatures. The TSF chipbreaker is Tungaloy’s dedicated finishing geometry with a positive rake angle and optimized groove profile that produces controlled, short chips across a wide feed range.
Key Difference vs. WNMG080404-TSF: The 08 corner radius (R0.8) allows higher feed rates (up to 0.30 mm/rev) while maintaining good surface finish, and provides a stronger edge for slightly harder or more abrasive workpiece conditions. Choose R0.4 for ultra-fine finishing; choose R0.8 for productive semi-finishing.
Search Keywords:
Model Code Decoder – WNMG080408-TSF T9115
Every character in the ISO insert designation carries precise engineering meaning:
80° Trigon (W)
0° (Negative)
±0.05–0.13mm
Hole + Chip Groove (Double-sided)
8.0mm (IC 9.525mm)
4.76mm
0.8mm (R0.8)
Tungaloy Super Finishing
Tungaloy Grade
PVD TiAlN Series
P15 – Steel Finishing
TSF Chipbreaker & R0.8 Corner – What Makes Them Different
- TSF (Tungaloy Super Finishing) geometry: Positive rake angle with narrow chip groove — minimizes cutting resistance, reduces vibration, and produces short, controlled chips at light-to-medium feeds.
- R0.8 corner radius advantage: Stronger edge than R0.4 — supports higher feed rates (fn up to 0.30 mm/rev), better chip thinning, and improved tool life in semi-finishing conditions.
- Surface finish trade-off: R0.8 achieves Ra 1.6 µm easily; Ra 0.8 µm achievable at optimized parameters. For Ra ≤ 0.4 µm, use the R0.4 variant.
- Polished rake face: Prevents built-up edge (BUE) on stainless steel and low-carbon steel throughout tool life.
Key Features
Technical Specifications
Metric & Imperial Dimensions
| Parameter | Metric | Imperial |
|---|---|---|
| Insert Shape | 80° Trigon (W) | 80° Trigon (W) |
| Inscribed Circle (IC) | 9.525 mm | 3/8 in |
| Cutting Edge Length (L) | 8.0 mm | 0.315 in |
| Insert Thickness (S) | 4.76 mm | 0.1875 in |
| Corner Radius (rε) | 0.8 mm | 1/32 in |
| Clearance Angle | 0° (Negative) | 0° (Negative) |
| Tolerance Class | M (±0.05–0.13 mm) | M (±0.002–0.005 in) |
| Hole Diameter | 3.81 mm | 0.150 in |
| Grade | T9115 | T9115 |
| Coating | PVD TiAlN Multi-Layer | PVD TiAlN Multi-Layer |
| ISO Application | P10–P25, M10–M25 | P10–P25, M10–M25 |
| Chipbreaker | TSF (Finishing) | TSF (Finishing) |
| Usable Cutting Edges | 4 edges (double-sided) | 4 edges (double-sided) |
| Packaging | 10 pcs / box | 10 pcs / box |
Recommended Cutting Parameters
| Workpiece Material | Cutting Speed Vc (m/min) | Cutting Speed Vc (SFM) | Feed Rate fn (mm/rev) | Feed Rate fn (in/rev) | Depth of Cut ap (mm) |
|---|---|---|---|---|---|
| Carbon Steel (P) | 180–320 | 591–1050 | 0.10–0.30 | 0.004–0.012 | 0.3–2.0 |
| Alloy Steel (P) | 150–280 | 492–919 | 0.10–0.25 | 0.004–0.010 | 0.3–1.5 |
| Stainless Steel (M) | 100–200 | 328–656 | 0.08–0.20 | 0.003–0.008 | 0.2–1.2 |
| Cast Iron (K) | 120–220 | 394–722 | 0.10–0.25 | 0.004–0.010 | 0.5–2.0 |
* Parameters are starting recommendations. The R0.8 corner radius supports higher feed rates than R0.4 — adjust based on machine rigidity, coolant, and required surface finish.
Corner Radius Comparison – R0.4 vs R0.8
| Parameter | WNMG080404-TSF (R0.4) | WNMG080408-TSF (R0.8) ✓ |
|---|---|---|
| Corner Radius | 0.4 mm | 0.8 mm |
| Max Feed Rate (fn) | 0.20 mm/rev | 0.30 mm/rev |
| Best Surface Finish | Ra ≤ 0.4 µm | Ra ≤ 0.8 µm |
| Edge Strength | Good | Better |
| Chip Thinning Effect | Moderate | Higher |
| Best Application | Ultra-fine finishing | Productive semi-finishing |
| Vibration Sensitivity | Lower | Slightly Higher |
🔧 Compatible Tool Holders (WNMG080408)
The WNMG080408 insert requires MWLNR/L or DWLNR/L series tool holders with an 08 pocket designation:
Contact us to confirm compatibility with your specific machine setup and turret type.
Applications
Tungaloy Grade Comparison – Steel Turning
| Grade | Coating | ISO Range | Best For | Speed Range |
|---|---|---|---|---|
| T9105 | PVD TiAlN | P05–P15 | High-speed finishing, hardened steel | Very High |
| T9115 ✓ | PVD TiAlN | P10–P25 | Finishing to semi-finishing, steel & SS | High |
| T9125 | PVD TiAlN | P20–P35 | Semi-finishing, light interrupted cuts | Medium-High |
| AH725 | CVD | P15–P30 | Semi-finishing to roughing, steel | Medium-High |
| AH8015 | CVD | P25–P40 | Roughing, heavy interrupted cuts | Medium |
| T9115 (M) | PVD TiAlN | M10–M25 | Stainless steel finishing | High |
✓ = Current product. PVD grades (T-series) = sharp edges, low forces. CVD grades (AH-series) = high-speed wear resistance.
Why Choose Us
Customer Reviews
"Using WNMG080408-TSF T9115 for semi-finishing 4140 steel shafts at fn 0.22 mm/rev. Surface finish is consistently Ra 1.2 — perfect for our bearing seat requirements. Tool life is excellent and predictable across the whole batch."
"Sehr gute Leistung bei der Halbschlichtbearbeitung von 42CrMo4. Die R0.8-Ecke erlaubt höhere Vorschübe als R0.4 bei gleichzeitig guter Oberflächenqualität. Standzeit übertrifft unsere bisherigen Werkzeuge deutlich."
"Ottimo inserto per la semi-finitura di acciaio inox 316L. La geometria TSF gestisce bene i trucioli anche a velocità moderate. Ra 1.6 raggiunto facilmente, Ra 0.8 con parametri ottimizzati. Prodotto originale, consegna puntuale."
"S45Cの大批量生産に使用。R0.8のおかげで送り量を上げても良好な表面粗さが得られます。工具寿命が安定しており、コスト当たりの加工数が大幅に改善されました。"
"Switched from a competitor insert to WNMG080408-TSF T9115 for our stainless steel rod production. Chip control is much better and we’re getting consistent Ra 1.2 across 200+ parts per edge. Very impressed with the tool life."
"用于45号钢半精加工，进给0.20mm/rev，表面粗糙度Ra1.6轻松达到。R0.8圆弧比R0.4更适合我们的生产节奏，刷刀次数明显增加。强烈推荐。"
"Excelente inserto para semi-acabamento de aço carbono. O raio R0.8 permite avancos maiores mantendo boa qualidade superficial. Vida da ferramenta muito consistente na produção em série."
Frequently Asked Questions
💡 Grade & Corner Radius Selection Tips – Tungaloy WNMG Series
- Corner Radius Guide: R0.4 = ultra-fine finishing (Ra ≤ 0.4 µm, fn ≤ 0.20) | R0.8 = productive semi-finishing (Ra 0.8–1.6 µm, fn ≤ 0.30) | R1.2 = roughing (fn ≤ 0.50).
- T9105 (PVD): Maximum hardness for high-speed finishing of hardened steel. Lowest toughness in the T-series.
- T9115 (PVD) — This Product: Best balance of wear resistance and toughness for finishing to semi-finishing of steel and stainless.
- T9125 (PVD): More toughness than T9115 — choose for light interrupted cuts or variable stock conditions.
- AH725 (CVD): High-speed semi-finishing to roughing. Superior crater wear resistance for dry cutting of steel.
- AH8015 (CVD): Maximum toughness for heavy roughing and interrupted cuts in steel.
- Chipbreaker guide: TSF = finishing/semi-finishing (fn 0.08–0.30) | TM = medium (fn 0.15–0.40) | TR = roughing (fn 0.25–0.60). Always match chipbreaker to your feed rate first.
- PVD vs CVD: PVD (T-series) = sharp edges, low forces, stainless & finishing. CVD (AH-series) = high speed, wear resistance, steel roughing.
Technical FAQ & Buying Guide
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.
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.
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.
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.
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.
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.