Tungaloy WNMG080416-THS T9125 Carbide Insert – PVD Heavy Roughing Severe Interrupted Cuts
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Tungaloy WNMG080416-THS T9125 Carbide Turning Insert – PVD Coated for Severe Interrupted Cuts & Heavy Steel Roughing
The most impact-resistant insert in the Tungaloy WNMG08 lineup. THS reinforced chipbreaker + R1.6 corner + T9125 tough grade — engineered for the most severe interrupted cuts, heavy forged steel roughing, and conditions where standard TH geometry reaches its limits.
Product Overview
"Which WNMG insert survives the most severe interrupted cuts and heavy forged steel roughing without edge fracture?"
The Tungaloy WNMG080416-THS T9125 represents the pinnacle of impact resistance in the Tungaloy WNMG08 series. The THS (Tungaloy Heavy Strengthened) chipbreaker is a reinforced evolution of the TH geometry, featuring a wider T-land edge hone, broader chip groove, and additional edge reinforcement specifically designed to withstand the extreme mechanical shock of severe interrupted cuts, heavy forged surfaces, and multi-interrupted workpieces where the standard TH chipbreaker would fracture.
Combined with the R1.6 corner radius (maximum chip thinning, maximum edge strength) and the T9125 enhanced-toughness PVD grade, this insert is the definitive choice for production environments where edge fracture and unpredictable tool life are the primary challenges — not surface finish or cutting speed.
Search Keywords:
Model Code Decoder – WNMG080416-THS T9125
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
1.6mm (R1.6)
Tungaloy Series
Heavy-Feed Geometry
Strengthened Edge
PVD TiAlN P20–P35
THS Chipbreaker – Reinforced Edge Engineering
- "S" = Strengthened edge land: The THS chipbreaker adds a wider, more robust T-land hone compared to TH — distributing impact forces over a larger edge area and dramatically reducing stress concentration at the cutting edge during severe interrupted cuts.
- Broader chip groove: Wider groove than TH accommodates the irregular, heavy chip loads generated during forged surface roughing and multi-interrupted workpieces without chip jamming or edge overload.
- Optimized for impact resistance over chip control: THS prioritizes edge survival over chip curl efficiency — chips may be less tightly controlled than TH, but the edge will survive conditions that fracture TH geometry.
- R1.6 synergy: The R1.6 corner radius distributes cutting forces over the maximum possible arc, working in concert with the THS reinforced edge to provide the highest impact resistance available in the WNMG08 series.
- Recommended conditions: Splined shafts, keyway shafts, multi-fluted components, heavily interrupted forged surfaces, cast steel with hard inclusions, and any application where TH geometry shows premature chipping.
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) | 1.6 mm | 1/16 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 | T9125 | T9125 |
| Coating | PVD TiAlN Multi-Layer | PVD TiAlN Multi-Layer |
| ISO Application | P20–P35, M20–M30 | P20–P35, M20–M30 |
| Chipbreaker | THS (Heavy Strengthened) | THS (Heavy Strengthened) |
| Usable Cutting Edges | 4 edges (double-sided) | 4 edges (double-sided) |
| Packaging | 10 pcs / box | 10 pcs / box |
Recommended Cutting Parameters
| Workpiece Material | Vc (m/min) | Vc (SFM) | fn (mm/rev) | fn (in/rev) | ap (mm) |
|---|---|---|---|---|---|
| Carbon Steel (P) – Continuous | 100–200 | 328–656 | 0.30–0.65 | 0.012–0.026 | 2.0–5.0 |
| Carbon Steel (P) – Interrupted | 80–160 | 262–525 | 0.25–0.55 | 0.010–0.022 | 2.0–4.0 |
| Alloy Steel (P) – Forged | 70–150 | 230–492 | 0.25–0.50 | 0.010–0.020 | 2.0–4.0 |
| Cast Steel (P/K) | 60–140 | 197–459 | 0.25–0.50 | 0.010–0.020 | 2.0–4.0 |
* THS is optimized for impact resistance over speed. Run at lower Vc than TH to maximize edge life in severe interrupted conditions. Minimum ap = 2.0 mm (never run ap < rε = 1.6 mm).
TH vs. THS Chipbreaker Comparison
| Parameter | TH (Heavy-Feed) | THS (Heavy Strengthened) ✓ |
|---|---|---|
| Edge Land (T-land) Width | Standard | Wider (reinforced) |
| Impact Resistance | High | Maximum |
| Chip Control Efficiency | Good | Moderate |
| Max Feed Rate (fn) | 0.70 mm/rev | 0.65 mm/rev |
| Interrupted Cut Severity | Standard interrupted | Severe interrupted |
| Forged Surface Resistance | Good | Excellent |
| Best Application | Heavy roughing, standard interruptions | Severe interruptions, multi-interrupted |
| When to Upgrade to THS | — | When TH shows edge chipping/fracture |
Full WNMG08 Chipbreaker Hierarchy
| Chipbreaker | Feed Range | Edge Strength | Best For |
|---|---|---|---|
| TSF | fn 0.05–0.20 | Good | Finishing, thin-wall, stainless |
| TM | fn 0.15–0.35 | Better | Semi-finishing, light interrupted |
| TH | fn 0.25–0.70 | Excellent | Heavy roughing, standard interrupted |
| THS ✓ | fn 0.25–0.65 | Maximum | Severe interrupted, forged, multi-interrupted |
🔧 Compatible Tool Holders (WNMG080416)
WNMG080416-THS uses the same MWLNR/L 08-pocket holders as all WNMG08 variants. For severe interrupted roughing, always use the largest, most rigid setup available:
For severe interrupted cuts: use maximum shank size, shortest overhang, and ensure all clamping screws are torqued to specification before running.
Applications
Tungaloy Grade Comparison – Steel Roughing
| Grade | Coating | ISO Range | Best For | Toughness |
|---|---|---|---|---|
| T9115 | PVD TiAlN | P10–P25 | Finishing to semi-finishing | ★★☆☆☆ |
| T9125 ✓ | PVD TiAlN | P20–P35 | Semi-finishing, roughing, severe interrupted | ★★★☆☆ |
| AH725 | CVD | P15–P30 | Semi-finishing to roughing | ★★★★☆ |
| AH8015 | CVD | P25–P40 | Heavy roughing, severe interrupted | ★★★★★ |
✓ = Current product. For conditions where T9125+THS still fractures, step up to AH8015 (CVD, maximum toughness). THS chipbreaker maximizes T9125’s toughness potential.
Why Choose Us
Customer Reviews
"We rough splined axle shafts with 36 splines — 36 interruptions per revolution. TH inserts were fracturing after 2–3 parts. Switched to WNMG080416-THS T9125 and now getting 15–20 parts per edge consistently. This insert was built for exactly this application."
"Eingesetzt für die Schruppbearbeitung von Schmiedekurbelwellen mit schwerer Zunderhaut. TH-Geometrie hat regelmäßig Schneidkantenausbruch verursacht. Mit THS ist die Standzeit um 300% gestiegen. Die verstärkte Schneidkante macht den entscheidenden Unterschied."
"Utilizzo THS per la sgrossatura di alberi scanalati in acciaio 42CrMo4. La geometria THS sopravvive alle interruzioni multiple che distruggevano la TH. Vita utensile molto più consistente e prevedibile in produzione di serie."
"SCM440のスプライン軟の荒剥き加工に使用。THでは欠损が頻発していたが、THSに変更後は安定した工具寿命を実現。強化された切削刺が断続切削の衝撃を完全に吸収します。"
"Roughing cast steel rolls with hard inclusions and heavy interrupted surfaces. THS T9125 is the only insert that gives us predictable tool life in these conditions. The reinforced edge handles the random impact loads that were causing catastrophic fracture with TH."
"用于42CrMo花键轴粗加工，每转多次断続。TH槽型平均加工2–3件就崩刀，THS可以稳定加工10件以上。强化切削刀尖对断続切削的抗冲击性能非常显著。"
"Using THS for roughing railway wheel blanks with heavy interrupted surfaces. Tool life improved by 250% compared to TH. The THS chipbreaker is clearly designed for the most severe conditions — exactly what we needed for this application."
Frequently Asked Questions
💡 Chipbreaker & Grade Selection – Tungaloy WNMG08 Interrupted Cut Guide
- TSF: Finishing only. Avoid interrupted cuts — sharp geometry will chip under impact.
- TM: Semi-finishing with light interrupted cuts (1–2 interruptions/rev, small keyways).
- TH: Heavy roughing with standard interrupted cuts. Use when interruptions are moderate and predictable.
- THS — This Product: Severe interrupted cuts (3+ interruptions/rev, splined shafts, heavy forged skin). Use when TH fractures.
- Grade escalation: T9115 → T9125 → AH725 → AH8015. Step up when current grade shows fracture, not just wear.
- R1.6 critical rule: Always ap > rε. Minimum ap = 2.0 mm for R1.6. Never run ap < 1.6 mm.
- Machine rigidity matters: For severe interrupted cuts, use 32mm+ shank, shortest overhang, and maximum clamping torque. Machine vibration amplifies impact loads and causes premature fracture regardless of insert grade.
- Last resort: If THS T9125 still fractures, switch to AH8015 (CVD, maximum toughness) with TH or THS chipbreaker.
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.