Korloy MGMN400-G PC9030 4mm Double-Ended Stainless Steel Grooving Insert (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy MGMN400-G PC9030 is a heavy-duty 4.0mm Double-Ended Grooving Insert engineered for Maximum Stability in Stainless Steel and Exotic Alloys. As the largest standard width in the series, the 4.0mm blade is designed to handle the massive cutting forces generated during the parting of large-diameter solid bars. The PC9030 PVD grade features a sophisticated multi-layer coating that excels in high-heat environments, preventing material adhesion (built-up edge) in demanding materials like 304/316 Stainless, Duplex, and Titanium.
Heavy-Duty Precision: The 4.0mm width ensures exceptional lateral rigidity. Combined with the reinforced -G chipbreaker, this insert maintains verticality in deep grooves, preventing the "coning" effect often seen in large-diameter parting-off operations.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | MGMN400-G |
| Insert Width (w) | 4.0 mm |
| Grade | PC9030 (Heavy-Duty PVD for Stainless) |
| Application | Stainless Steel / HRSA / Titanium |
Core Performance Benefits:
- Maximum Rigidness: The 4.0mm thick body absorbs vibration, allowing for aggressive feed rates in large-scale machining.
- Nano-PVD Coating: The TiAlN-based PC9030 coating provides ultra-low friction, crucial for preventing chip welding in gummy stainless steels.
- Double-Ended Value: Two reinforced cutting edges provide extreme durability and a significantly lower cost-per-cut.
- Superior Heat Dissipation: The larger mass of the 4mm insert helps dissipate heat away from the cutting zone, protecting the edge during long cuts.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Austenitic Stainless (304/316) | 70 - 140 m/min | 0.10 - 0.25 mm/rev |
| Duplex Stainless Steel | 40 - 90 m/min | 0.08 - 0.18 mm/rev |
| Heat Resistant Alloys (Inconel) | 20 - 50 m/min | 0.06 - 0.15 mm/rev |
Compatible Tool Holders:
Must be used with heavy-duty 4.0mm MGEHR/L external holders:
- External Holders: MGEHR 2020-4 / 2525-4 / 3232-4
The 4.0mm Choice: PC9030 vs. NC3030
For 4mm wide grooving, the material type dictates the coating technology:
The Stainless & Exotic Expert. Use for all stainless steels and high-temp alloys. It handles "sticky" materials that cause other inserts to chip.
The Steel Toughness Expert. Use for standard carbon steel and alloy steel, especially when interrupted cuts or heavy scale are present.
Machinist's Pro Tip: When parting large solid stainless bars with the MGMN400-G PC9030, remember to reduce the feed rate (f) by 50% as you approach the center of the bar to ensure a clean finish and prevent the "pip" from snapping the edge.
Packaging: 10 pieces per box.
Korloy MGMN400-G price, 4mm stainless steel parting tool, heavy duty grooving insert for 316 stainless, MGMN400-G speed and feed for Inconel, 4.0mm PVD coated parting insert
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.