Korloy FGD400R-04 NC3030 4mm Single-Ended Grooving & Parting Insert (10pcs)
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The Original Korloy FGD400R-04 NC3030 is a heavy-duty Single-Ended Parting and Grooving Insert engineered for maximum stability in challenging Steel (P) applications. With a robust 4.0mm cutting width and a 0.4mm corner radius, this insert is the professional choice for deep-grooving and parting-off large diameter workpieces. The single-ended design ensures superior clamping rigidity, preventing the insert from twisting or vibrating under the heavy radial forces common in 4mm-wide cuts. Utilizing the NC3030 CVD coating, it provides unmatched shock resistance for interrupted cuts and rough surfaces.
Heavy-Duty Stability: When machining grooves 4mm wide or larger, tool deflection is a major risk. The FGD400R's single-end architecture provides the massive seating support needed to maintain straight walls and a flat groove bottom, even in tough alloy steels.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | FGD400R-04 |
| Insert Design | Single-Ended (Heavy Load Capacity) |
| Width (w) | 4.0 mm |
| Grade | NC3030 (Premium Tough-CVD) |
Core Performance Benefits:
- Maximum Rigidness: The long-shank single-end body design eliminates vibration during deep parting operations in large bars.
- Interrupted Cut Excellence: The NC3030 grade is specially formulated to prevent chipping when hitting hex corners, cross-holes, or uneven surfaces.
- Proprietary Chipbreaker: FGD's geometry forces chips to collapse into a "C" shape narrower than 4mm, protecting the finished side-walls from scratches.
- Advanced Thermal Shield: CVD coating technology handles the immense heat of 4mm wide friction, extending tool life in mass production.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Carbon Steel (AISI 1045) | 110 - 200 m/min | 0.10 - 0.22 mm/rev |
| Alloy Steel (4140/SCM440) | 90 - 160 m/min | 0.07 - 0.18 mm/rev |
| Forged Steel / Heavy Castings | 70 - 130 m/min | 0.07 - 0.15 mm/rev |
Compatible Tool Holders:
Requires Korloy FGD style 4mm specific holders:
- External Grooving Bar: FGDR / FGDR 2020-4 / 2525-4
The 4mm Powerhouse: NC3030 vs. PC9030
When machining 4mm wide grooves, the choice of grade defines your tool life:
The Impact King. Designed for heavy-duty steel machining. It thrives in high-heat environments and handles vibrations far better than PVD grades.
The Precision Specialist. Switch to this only if you are grooving Stainless Steel or require a razor-sharp edge for very soft, gummy steels.
Machinist's Pro Tip: For 4mm width parting, ensure your coolant is directed precisely at the cutting edge. The wider the insert, the harder it is for coolant to reach the tip inside a deep groove—use high-pressure through-coolant if available.
Packaging: 10 pieces per box.
Korloy FGD400R-04 price, 4mm width parting insert for large steel bars, deep grooving tools for interrupted cuts, NC3030 vs NC3020 for 4mm grooves, heavy duty CNC parting tool 4mm