Korloy SP400 NC3030 4mm Single-Ended Parting Insert for Heavy Interrupted Cuts (10pcs)
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The Original Korloy SP400 NC3030 is a heavy-duty 4.0mm Single-Ended Parting and Grooving Insert engineered for the most demanding machining environments. When parting large-diameter solid bars or cutting through interrupted surfaces (like hex bars or keyed shafts), the NC3030 Ultra-Tough Grade provides the necessary shock absorption to prevent edge fracture. The 4mm width offers maximum blade rigidity, making it the premier choice for heavy industrial turning.
Built for Heavy Impact: NC3030 is Korloy’s flagship grade for unstable conditions. Combined with the 4.0mm single-ended design, this insert excels where others fail—handling mechanical shock and vibration with ease while maintaining a predictable tool life.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| Model Code | SP400 |
| Cutting Width (W) | 4.0 mm |
| Grade | NC3030 (Maximum Toughness CVD) |
| Design | Single-Ended (Deep & Heavy Duty) |
Core Performance Benefits:
- Maximum Edge Strength: The 4.0mm profile provides a massive cross-section to resist the bending forces of heavy-duty plunging.
- Anti-Fracture Technology: NC3030 substrate is optimized to stop crack propagation, even during violent interrupted cuts in forged steel.
- Superior Heat Management: Advanced CVD coating shields the tool from the intense heat generated when cutting 4mm wide grooves.
- Enhanced Stability: The single-ended design ensures the insert is locked securely in the holder, eliminating vibration during large-diameter parting.
Recommended Cutting Parameters (Heavy/Interrupted):
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Carbon Steel (Interrupted) | 60 - 140 m/min | 0.08 - 0.20 mm/rev |
| Alloy Steel (Forged/Black Skin) | 50 - 110 m/min | 0.06 - 0.18 mm/rev |
| Heavy Parting to Center | 40 - 90 m/min | 0.05 - 0.12 mm/rev |
Compatible Tool Holders:
Requires high-rigidity 4.0mm parting systems for safe operation:
- Heavy Duty Blades: SPB 32-4 / SPB 26-4
- Mounting Blocks: SMBB 2532 / 3232 Series
Machinist Tip: Why choose SP400 NC3030?
Optimizing your heavy-duty parting operations:
Maximum Edge Security. Use this grade if you are parting off large forged shafts or hexagonal bars. It sacrifices some cutting speed for extreme resistance against chipping and sudden breakage.
Speed Specialist. If you have a brand-new CNC machine and are parting clean, round carbon steel bars, NC3020 will allow for higher RPMs and longer wear life.
Pro Advice: For 4mm parting, machine rigidity is everything. Ensure your tool overhang is as short as possible. If the tool starts to vibrate, NC3030 is your best insurance policy against the insert shattering.
Packaging: 10 pieces per box.
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