Korloy DCMT070204-HMP PC9030 Stainless Steel Turning Insert (10pcs)
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The Original Korloy DCMT070204-HMP PC9030 (ANSI Standard: DCMT 21.51) is the most popular choice for precision turning of Stainless Steel (M) and Exotic Alloys (S). Featuring a 0.4mm (1/64") nose radius, this insert provides a perfect balance between surface finish quality and edge durability. The HMP chipbreaker is specifically engineered for semi-finishing, offering exceptional chip control to prevent the long, tangled nests typical of austenitic stainless steels. Coupled with the PC9030 PVD grade, it offers elite resistance against heat and built-up edges.
The Stainless Specialist: PC9030 is Korloy’s flagship PVD grade for stainless steel. Its high-toughness substrate and specialized coating layers prevent the micro-chipping often caused by work-hardening materials.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | DCMT070204-HMP |
| ANSI Code | DCMT 21.51 |
| Grade | PC9030 (Premium PVD for Stainless Steel) |
| Nose Radius | 0.4 mm (Versatile Strength & Finish) |
Core Performance Benefits:
- Optimized HMP Geometry: Designed to break chips even at low feed rates, ensuring a clean workspace and protecting the finished surface.
- Excellent Thermal Stability: The PC9030 grade survives the high localized heat generated during the machining of 304/316 stainless steel.
- Edge Security: The 0.4mm radius is more robust than the 0.2mm, allowing for deeper cuts and longer tool life in semi-stable setups.
- Versatile Application: While optimized for stainless, it performs exceptionally well on low-carbon steels and heat-resistant superalloys (Inconel, etc.).
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Stainless Steel (Austenitic) | 90 - 170 m/min | 0.08 - 0.20 mm/rev | 0.5 - 2.5 mm |
| High Temp Alloys (Inconel) | 25 - 60 m/min | 0.05 - 0.15 mm/rev | 0.3 - 1.5 mm |
| Soft Carbon Steel | 150 - 280 m/min | 0.10 - 0.25 mm/rev | 0.5 - 3.0 mm |
Compatible Tool Holders:
Compatible with standard 55° diamond holders using 07-size pockets:
- External Holders: SDJCR/L 1010H07 / 1212F07 / 1616H07
- Internal Boring Bars: S10K-SDUCR07 / S12M-SDUCR07 / S16Q-SDUCR07
Stainless Tooling Tip: HMP vs. HM
Choosing the right chip control for your DCMT 07 series:
Best for Precision & Finishing. It has a sharper edge and a narrower groove, making it superior for smaller machines and light-to-medium depths of cut.
Best for Universal Medium Cutting. It features a stronger land for heavier chip loads but may cause vibration on very thin workpieces.
Machinist's Insight: For R0.4 (DCMT 21.51), ensure you are cutting deep enough to engage the HMP chipbreaker (at least 0.5mm) to avoid long stringy chips.
Packaging: 10 pieces per box.