Korloy CCMT120408-HMP NC3120 Universal Steel Turning Insert (10pcs)
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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.