Korloy CCMT120408-HMP NC3120 Universal Steel Turning Insert (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy CCMT120408-HMP NC3120 is an exceptionally versatile solution for medium-to-heavy steel turning. By combining the robust size-12 geometry with the NC3120 universal balanced grade and a 0.8mm nose radius, this insert delivers high edge strength and stable tool life, making it suitable for a vast range of steel alloys and cutting conditions.
Guide: Not sure if you need Size 12 or Size 09? Read our CCMT06 vs 09 vs 12: How to Choose Based on Workpiece Diameter.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | CCMT120408-HMP |
| Grade | NC3120 (Universal Balance Grade) |
| Nose Radius | 0.8 mm (High Edge Strength) |
| Chipbreaker | HMP (Versatile Medium-Duty) |
Core Performance Benefits:
- High Metal Removal Rate: The 0.8mm radius allows for more aggressive feed rates, significantly reducing machining time.
- Universal Versatility: NC3120 grade provides a perfect balance of wear resistance and toughness, reducing the need for tool changes between different steel types.
- Maximum Stability: The size-12 thickness (4.76mm) offers superior mechanical strength and heat dissipation for heavy-duty applications.
- CVD Coating Tech: High-performance coating ensures consistent tool life and protects against crater wear during high-speed operations.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon Steel (HB180-280) | 150 - 320 m/min | 0.15 - 0.40 mm/rev | 0.8 - 4.5 mm |
| Alloy Steel (HB280-350) | 120 - 250 m/min | 0.12 - 0.35 mm/rev | 0.8 - 3.5 mm |
Compatible Tool Holders:
For heavy turning operations, pair this CCMT 12 insert with standard SCLCR/L type holders (Size 12):
- External Turning: SCLCR2020K12 / SCLCR2525M12 / SCLCR3232P12
- Boring Bars (Internal): S25S-SCLCR12 / S32T-SCLCR12
Quick Guide: Korloy Steel Grade Selection
Which NC grade is best for your application?
Best for high-speed continuous cutting in very stable conditions.
The perfect all-rounder (this model). Balanced toughness and wear resistance.
Best for heavy interrupted cuts and unstable setups.
Machinist's Tip: This R0.8 insert is our top recommendation for removing raw material skin or roughing out large steel parts with NC3120 versatility.
Packaging: 10 pieces per box.
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.