Korloy FMM400R-04 NC3030 4mm Single-Ended Multi-Functional Grooving Insert (10pcs)
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The Original Korloy FMM400R-04 NC3030 is a heavy-duty Single-Ended Multi-Functional Insert specifically engineered for Grooving, Side-Turning, and Parting-off operations. The 4.0mm cutting width combined with the single-ended design provides maximum seating rigidity, making it superior for Deep Grooving where tool deflection must be avoided. Coated with the high-toughness NC3030 CVD grade, this insert excels in machining Carbon Steels, Alloy Steels, and parts with interrupted surfaces or tough scales.
Engineered for Versatility: The FMM series features a reinforced chipbreaker geometry that allows for both radial plunging and axial turning. This enables you to finish complex profiles and wide grooves with a single tool, significantly reducing cycle times in high-production environments.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | FMM400R-04 |
| Insert Design | Single-Ended (Maximum Stability) |
| Width (w) | 4.0 mm |
| Grade | NC3030 (Premium CVD for Steel) |
Core Performance Benefits:
- Multi-Directional Machining: Seamlessly switch between plunging and longitudinal turning without secondary tool setups.
- Single-Ended Rigid Seat: The long insert body provides a massive clamping surface, effectively eliminating vibration during heavy 4mm side-turning.
- Exceptional Toughness: NC3030 grade utilizes a specialized substrate that resists micro-chipping even in the most demanding interrupted cutting conditions.
- Optimized Chip Evacuation: The M-type chipbreaker ensures tight chip curls, preventing surface damage and tool overheating.
Recommended Cutting Parameters:
| Operation | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Radial Grooving | 90 - 170 m/min | 0.07 - 0.18 mm/rev |
| Side-Turning (Axial) | 110 - 190 m/min | 0.12 - 0.30 mm/rev |
| Parting-off | 80 - 150 m/min | 0.05 - 0.15 mm/rev |
Compatible Tool Holders:
Ensure maximum performance by pairing with high-rigidity FMMR holders:
- Multi-Functional Holders: FMMR 2020-4 / FMMR 2525-4 / FMMR 3232-4
The Single-Ended Specialist: FMM vs. FGD
Choosing the right geometry for your 4.0mm application is key to tool life:
Best for Grooving + Side Turning. The edge is specifically honed to handle the lateral loads of longitudinal turning. Mandatory for complex profile work.
Best for Direct Parting & Grooving. While highly stable in radial plunging, it is NOT designed for side-turning. Use FGD only for simple cut-off tasks.
Machinist's Pro Tip: For 4mm width lateral turning, always maintain a consistent feed rate. Reducing the feed too much can cause the insert to rub rather than cut, leading to rapid work-hardening of the steel and premature wear of the NC3030 coating.
Packaging: 10 pieces per box.
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