Korloy TCMT16T304-HMP PC9030 Stainless Steel Turning Insert (10pcs)
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The Original Korloy TCMT16T304-HMP PC9030 is a heavy-duty Triangular Indexable Turning Insert specifically engineered to conquer Stainless Steel (M-Group) and Exotic Alloys. Built on a high-toughness substrate with the legendary PC9030 PVD Coating, it excels in resisting thermal cracking and built-up edge (BUE). The HMP (Medium-Finish) Chipbreaker is designed for versatility, offering smooth chip control across a wide range of cutting depths on large-scale workpieces.
Superior for Large Diameter Turning: The TCMT16 size provides the necessary mechanical strength and thermal mass for machining large stainless steel components. PC9030's specialized coating acts as a chemical and thermal barrier, significantly extending tool life in abrasive stainless applications.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Designation | TCMT16T304-HMP |
| Corner Radius (r) | 0.4 mm (Precision Finishing) |
| Grade | PC9030 (Premium PVD for Stainless) |
| Insert Thickness | 3.97 mm |
Core Performance Benefits:
- Engineered for M-Group: Specifically designed to handle the high-temperature and work-hardening nature of stainless steel alloys.
- Advanced HMP Geometry: Optimized rake angles reduce cutting pressure, which helps maintain lower workpiece temperatures and prevents deformation.
- Ultra-Smooth PVD Coating: Reduces friction between the chip and the rake face, preventing the "sticking" common with austenitic stainless steels.
- Edge Security: The 16mm insert size provides excellent stability for large boring bars, even under slightly unstable conditions.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Stainless Steel (304 / 316) | 90 - 200 m/min | 0.08 - 0.25 mm/rev | 0.5 - 3.5 mm |
| Duplex Stainless | 60 - 130 m/min | 0.10 - 0.20 mm/rev | 0.5 - 2.5 mm |
| Inconel / Titanium | 30 - 70 m/min | 0.06 - 0.15 mm/rev | 0.3 - 2.0 mm |
Compatible Tooling Systems:
Pairs perfectly with large triangular toolholders:
- External Turning: STGCR 2020K16 / STGCR 2525M16
- Internal Boring: S20R-STUCR16 / S25S-STUCR16 / S32T-STUCR16
Machinist Tip: Mastering Heavy Stainless Cuts
Why the TCMT16 PC9030 is the professional's choice:
Anti-Built-Up Edge. PVD grades like PC9030 are essential for stainless because they have sharper edges and smoother coatings than CVD grades. This prevents the stainless steel from "welding" to the tool, which is the #1 cause of failure in 16mm inserts.
The Generalist. Use PC5300 only if your daily work switches frequently between stainless, steel, and cast iron. If your machine is dedicated to stainless production, stick with PC9030 for superior tool life.
Pro Advice: When boring with a TCMT16 insert, always use high-pressure coolant if possible to clear chips. Stainless chips are tough and stringy; re-cutting them will quickly destroy your finishing edge.
Packaging: 10 pieces per box.
Korloy TCMT16T304-HMP technical data, best insert for large 304 stainless shafts, TCMT16T304 stainless steel feed and speed, PC9030 vs PC5300 for 316 stainless, heavy duty boring bar inserts for duplex stainless
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.