Korloy SP300 NC3030 3mm Single-Ended Parting Insert for Interrupted Steel (10pcs)
30-Day Free Returns
Free Worldwide Shipping
The Original Korloy SP300 NC3030 is a 3.0mm Single-Ended Parting and Grooving Insert engineered for maximum impact resistance. While standard inserts often chip when encountering forged skins or interrupted surfaces, the NC3030 High-Toughness Grade is specifically designed to absorb mechanical shock and prevent catastrophic failure. This 3mm insert is the industry's reliable solution for parting off hexagonal bars, large-diameter solid stock, and components with cross-holes.
Ultimate Durability: NC3030 is Korloy’s most impact-resistant CVD grade for steel. If your parting operations are plagued by vibration or edge chipping, the SP300 NC3030 provides the "safety net" needed to maintain consistent production in unstable conditions.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| Insert Style | Single-Ended (Parting Specialist) |
| Cutting Width (W) | 3.0 mm |
| Grade | NC3030 (High-Toughness CVD Coating) |
| Ideal For | Interrupted Cuts, Raw Forgings, Unstable Machines |
Core Performance Benefits:
- Exceptional Shock Absorption: The specialized substrate stops micro-cracks from turning into tool breakages during violent entries.
- Reinforced Single-Ended Body: The long shank provides a massive seating surface, reducing the chance of the insert "twisting" in the holder under load.
- Stable Chip Flow: The SP chipbreaker narrows the chip effectively, preventing friction against the sidewalls of deep 3mm grooves.
- High Heat Protection: Thick CVD layers shield the carbide core, allowing for reliable tool life even when cutting heat builds up.
Recommended Cutting Parameters (Tough Conditions):
| Condition | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Carbon Steel (Interrupted) | 70 - 150 m/min | 0.06 - 0.15 mm/rev |
| Alloy Steel (Forged Surface) | 60 - 120 m/min | 0.05 - 0.12 mm/rev |
| Heavy Duty Parting Off | 50 - 110 m/min | 0.04 - 0.10 mm/rev |
Compatible Tool Holders:
Maximize performance by using high-rigidity 3.0mm systems:
- Standard Blades: SPB 26-3 / SPB 32-3
- Tool Holder Blocks: SMBB 2026 / 2532 Series
Machinist Tip: Why Choose NC3030 for SP300?
When toughness is more important than speed:
Anti-Breakage. Use this grade if your 3.0mm inserts are snapping due to hexagonal bar impacts, machine vibration, or "pip" formation at the center. It's the most forgiving grade Korloy makes for steel.
High Productivity. If you are cutting clean, round bars in a high-rigidity CNC, NC3020 allows for much higher cutting speeds and longer wear life compared to NC3030.
Pro Advice: When parting off with NC3030, don't be afraid to lower the RPM slightly to manage vibration. The toughness of this grade will protect the edge even in sub-optimal cutting conditions.
Packaging: 10 pieces per box.
Korloy SP300 NC3030 performance, 3mm insert for parting hex steel, best parting tool for unstable lathes, NC3030 vs NC3020 grooving grade, heavy duty 3mm grooving insert parameters