Korloy SNMG120404-HM PC9030 Stainless Steel Turning Insert (10pcs)
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The Original Korloy SNMG120404-HM PC9030 is a high-performance Double-Sided Square Turning Insert specifically engineered for Stainless Steel (M-Group) and High-Temperature Alloys. Featuring the premium PC9030 PVD Grade, this insert provides exceptional resistance to built-up edge and thermal cracking. The -HM (Highly Medium) chipbreaker is designed with a stable land to handle varying depths of cut while the 0.4mm Corner Radius ensures low cutting pressure and high precision for delicate components.
The Precision Workhorse: While the 0.8mm radius is standard for roughing, the 0.4mm radius of the SNMG120404-HM is the professional's choice for reducing vibration on slender parts and achieving superior surface finishes in gummy materials like 316L stainless.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | SNMG120404-HM |
| Corner Radius | 0.4 mm (High Precision) |
| Substrate | PC9030 (Ultra-Fine PVD Coated) |
| Edges | 8 Usable Cutting Edges |
Core Performance Benefits:
- Advanced PVD Coating: The PC9030 grade features a smooth, lubricated surface that prevents "welding" of gummy stainless steel to the tool tip.
- Optimized HM Geometry: The -HM chipbreaker ensures consistent chip evacuation even at higher metal removal rates.
- Low Cutting Force: The 0.4mm radius minimizes radial pressure, significantly reducing chatter in thin-wall or long-reach applications.
- 8-Edge Economy: Double-sided design reduces tooling costs by up to 50% compared to positive-geometry inserts.
Recommended Cutting Parameters (Stainless Steel):
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| 304 / 316 Stainless | 100 - 180 m/min | 0.10 - 0.25 mm/rev | 0.5 - 3.0 mm |
| Duplex Stainless | 40 - 90 m/min | 0.08 - 0.20 mm/rev | 0.5 - 2.5 mm |
| High-Temp Alloys | 25 - 50 m/min | 0.08 - 0.18 mm/rev | 0.3 - 2.0 mm |
Compatible Tool Holders:
Precision fit for standard 12.7mm (1/2") IC negative holders:
- External Turning: MSSNR 2020 / 2525 / 3232 Series
- Boring Bars (Internal): S25S-MSSNR12 / S32T-MSSNR12
Machinist Tip: PC9030 vs PC5300 for Stainless
Choosing the right Korloy PVD grade for your material:
The Stainless Specialist. Optimized specifically for M-class materials (Stainless Steel). It has a specialized coating that reduces friction and prevents the chemical bonding that causes sticking in 300-series stainless.
The Tough Fighter. Better for general steel and cast iron, or when machining stainless at very low speeds with heavy interruptions. PC9030 is generally faster and cleaner in stainless steel.
Pro Advice: For SNMG120404-HM, use high-pressure coolant directed exactly at the cutting zone. This flushes away the "sticky" stainless chips before they can wrap around the tool and mar the surface finish.
Packaging: 10 pieces per box.
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