TaeguTec CNMG120404PC TT9215 | High-Speed Steel Finishing Insert
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TaeguTec CNMG120404PC TT9215
Precision Finishing Master: High-Speed CVD Grade for Superior Steel Surface Integrity
Product Overview
"Which carbide insert grade is the best for achieving tight tolerances and a mirror finish on carbon steel while running at maximum CNC spindle speeds?"
The TaeguTec CNMG120404PC TT9215 is an 80° rhombic insert designed for high-efficiency finishing of ISO P (Steel). The TT9215 CVD grade utilizes advanced Al2O3 coating technology to provide extreme wear resistance and heat insulation, allowing for significantly higher cutting speeds than traditional grades. The PC (Positive Finishing) chipbreaker is ground for sharpness, reducing vibration and cutting force on fine passes, making it the perfect choice for high-precision steel components.
Key Features
Features a thick alumina layer for superior crater wear resistance and thermal protection during continuous high-speed cutting.
A positive rake angle prevents work hardening and ensures smooth chip flow on finishing depths of cut.
Optimized for fine surface finishes and maintaining exact dimensional tolerances on delicate parts.
Technical Specifications
ISO Code Decoding: CNMG120404PC
80° Rhom
0° Relief
Tolerance
Sintered
12.7mm IC
4.76mm S
0.4mm RE
Finish
| Unit System | Designation | I.C. Dimension | Radius (RE) |
|---|---|---|---|
| Metric (ISO) | CNMG120404PC | 12.7 mm | 0.4 mm |
| Imperial (ANSI) | CNMG431PC | 0.500" | 0.015" |
Recommended Cutting Parameters (ISO P)
| Material Group | Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Low Carbon Steel (S20C/S45C) | 280 - 450 m/min | 0.08 - 0.25 mm/rev |
| Alloy Steel (4140/SCM440) | 220 - 380 m/min | 0.10 - 0.22 mm/rev |
Compatible Toolholders
This precision insert fits all standard 12mm holders including DCLNR/L 12, PCLNR/L 12, and MCLNR/L 12 external tools and boring bars.
Product Applications
- High-speed finishing of carbon steel automotive drive shafts.
- Precision turning of alloy steel gears and hydraulic components.
- Mirror-finish machining of high-tolerance steel bearing housings.
- General-purpose precision finishing in mass-production CNC environments.
TaeguTec Grade Comparison (Steel)
| Grade Name | Coating Focus | Best Use Case |
|---|---|---|
| TT9215 (CVD) | High Speed/Wear | Finishing: High-speed steel turning. |
| TT9225 (CVD) | Balanced Toughness | General: Medium to rough steel cuts. |
Why Choose TaeguTec?
A global leader in the IMC Group, TaeguTec represents the absolute frontier of metallurgical innovation. The TT9215 grade is the result of focused research into carbon steel's thermal behavior at high speeds. By choosing TaeguTec, you are investing in unmatched tool consistency, enabling your machine shop to reduce cycle times and achieve superior profitability through precision engineering.
Verified Global Feedback
"Exceptional Surface Quality"
We use these for finishing 1045 steel pins. The PC breaker is incredibly sharp—the surface finish is flawless and tool life is excellent at 350 m/min.
— Precision Components (USA)"High Speed Reliability"
Finally a grade that doesn't burn out during long finishing runs on alloy steel. TT9215 is remarkably consistent.
— Machining GmbH (Germany)"Perfect for Tight Specs"
The 0.4mm radius maintains dimensional accuracy perfectly. Very predictable wear pattern makes it easy to manage our tool changes.
— Automotive Mfg (Japan)Frequently Asked Questions
1. Is the PC breaker suitable for roughing?
No, the PC (Positive Finishing) breaker is designed specifically for light finishing. For roughing, we recommend the MT or RT geometries.
2. How does TT9215 perform in wet machining?
TT9215 is optimized for high-speed dry and wet machining. In continuous steel turning, the CVD coating provides exceptional protection against thermal shock.
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.