KORLOY FMM500R-04 NC3030 Indexable Milling Inserts | PVD Coated Carbide Inserts for Face Milling & High-Feed Roughing CNC Cutters (10pcs/box) / FMM500R-04 NC3030 Metric & Imperial Milling Tooling
KORLOY FMM400R-04 NC3030 Indexable Milling Inserts | PVD Coated Carbide Inserts for Face Milling & High-Feed Roughing CNC Cutters (10pcs/box) / FMM400R-04 NC3030 Metric & Imperial Milling Tooling
KORLOY FMM400R-04 NC3020 Indexable Milling Inserts | PVD Coated Carbide Inserts for Face Milling & High-Feed Roughing CNC Cutters (10pcs/box) / FMM400R-04 NC3020 Metric & Imperial Milling Tooling
KORLOY FMM300R-03 NC3030 Indexable Milling Inserts | PVD Coated Carbide Inserts for Face Milling & High-Feed Roughing CNC Cutters (10pcs/box) / FMM300R-03 NC3030 Metric & Imperial Milling Tooling
KORLOY FMM300R-03 PC9030 Indexable Face Grooving & Turning Inserts | PVD Coated Carbide Inserts for CNC Lathe Machining (10pcs/box) / FMM300R-03 PC9030 Metric & Imperial Grooving Tooling
KORLOY FMM Carbide Grooving Inserts — Face Grooving, Recessing & Parting
The KORLOY FMM series is a family of single-ended indexable carbide inserts designed for face grooving, recessing, and parting-off operations on CNC turning lathes. The full-radius cutting edge profile provides a stable, evenly distributed cutting force that resists chipping on interrupted cuts, while the KORLOY PVD coating technology on the NC3030 grade (steel & cast iron) and PC9030 grade (stainless & tough alloys) gives the FMM series long tool life in production environments.
FMM Nomenclature Decoder (ISO 1832)
What's in This Collection (5 Insert Variants)
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FMM500R-04 NC3030 — 12 mm Full Radius Grooving
The largest FMM insert in the line, used for deep face grooving and parting off on lathes with high-power spindles. The 0.4 mm full radius profile gives smooth chip flow on deep grooves. NC3030 grade for steel and cast iron. -
FMM400R-04 NC3030 — 10 mm Full Radius Grooving
Mid-range FMM for general face grooving, recessing, and profile turning. Fits standard 10 mm grooving tool holders and modular blade systems. NC3030 grade for steel & cast iron. -
FMM300R-03 NC3030 — 6 mm Full Radius Grooving (Steel)
The most popular FMM size. Used for shallow face grooving, light parting, and recessing on small-diameter shafts. NC3030 grade gives long tool life on carbon steel and alloy steel. -
FMM300R-03 PC9030 — 6 mm Full Radius Grooving (Stainless)
Same 6 mm pocket as the NC3030 version, but with the tougher PC9030 PVD grade for stainless steel, duplex alloys, and harder workpiece materials. Optimized for built-up edge resistance and notch wear control. -
FMM300R-03 — Two grades, one pocket
The 6 mm FMM size is available in both NC3030 (steel) and PC9030 (stainless), letting you switch between workpiece materials by changing the insert rather than the tool holder.
Carbide Grades
| Grade | Coating | ISO Class | Best For |
|---|---|---|---|
| NC3030 | PVD multi-layer AlCrN | P15–P30 / K15–K30 | Carbon steel, alloy steel, cast iron face grooving & recessing |
| PC9030 | PVD TiAlN | M20–M40 / S20–S30 | Austenitic stainless, duplex, heat-resistant alloys |
ISO Specs & Recommended Cutting Parameters
| ISO Designation | Width (mm) | Full Radius (mm) | Vc Steel (m/min) | fn (mm/rev) |
|---|---|---|---|---|
| FMM500R-04 NC3030 | 3.0 | 0.4 | 100 – 200 | 0.05 – 0.15 |
| FMM400R-04 NC3030 | 3.0 | 0.4 | 100 – 200 | 0.05 – 0.15 |
| FMM300R-03 NC3030 | 2.0 | 0.3 | 100 – 200 | 0.05 – 0.12 |
| FMM300R-03 PC9030 | 2.0 | 0.3 | 80 – 150 | 0.04 – 0.10 |
Stainless / heat-resistant alloys (PC9030): reduce Vc by 20–30% and use high-pressure internal coolant to suppress built-up edge.
Compatible Tool Holders
KORLOY FMM inserts fit standard single-ended face grooving tool holders (KGMR / KGML series or equivalent) and modular blade systems. Browse our indexable tool holder accessories for matched arbors, blades, and parting blocks.
- FMM500R-04: 12 mm grooving blade, KGM-12 or equivalent holder
- FMM400R-04: 10 mm grooving blade, KGM-10 or equivalent holder
- FMM300R-03: 6 mm grooving blade, KGM-6 or equivalent holder; also fits parting blocks for cut-off operations
Common Applications
- Face grooving on turned shafts, flanges, and hubs (radial plunging on lathe)
- Recessing for O-ring grooves, snap-ring grooves, and seal seats
- Parting off small-diameter bar stock on CNC lathes
- Profile turning and contour grooving with varying diameters
- Undercutting on shoulder faces for assembly clearance
Why Choose KORLOY FMM
- ✅ 100% original Korean production — KORLOY Inc. (founded 1996), ISO 9001:2015, full lot traceability
- ✅ 30–50% below OEM list through direct-from-Korea pricing and Hangzhou warehouse consolidation
- ✅ Two grades in one pocket — NC3030 (steel) and PC9030 (stainless) share the FMM300R-03 size, simplifying inventory
- ✅ Full-radius cutting edge distributes cutting force evenly, reducing chipping on interrupted cuts
- ✅ Free cross-reference — email us a Sandvik / Mitsubishi / Iscar / Kennametal insert code for a matched KORLOY equivalent
Frequently Asked Questions
Q: What's the difference between FMM NC3030 and PC9030 grades?
A: NC3030 is a PVD multi-layer AlCrN grade optimized for steel & cast iron face grooving. PC9030 is a PVD TiAlN grade optimized for stainless steel, duplex alloys, and heat-resistant materials where built-up edge and notch wear are concerns.
Q: Can I use the same FMM300R-03 tool holder for both NC3030 and PC9030 grades?
A: Yes. The pocket geometry is identical — only the grade changes. You can switch between steel and stainless workpieces by swapping the insert, no tool holder change required.
Q: What are the equivalent KORLOY FMM grades in Sandvik or Mitsubishi?
A: NC3030 is a direct equivalent to Sandvik GC1125 and Mitsubishi US7020 for steel face grooving. PC9030 matches Sandvik GC1125 (stainless variant) and Iscar GF N for stainless and tough alloys.
Q: Can FMM inserts be used for parting off small bar stock?
A: Yes — the FMM300R-03 is commonly used for cut-off on small-diameter bar (under 30 mm). For larger diameter cut-off, switch to a dedicated parting blade (KORLOY KTMR series).
Browse Related KORLOY Series & Inserts
FMM is part of KORLOY's broader indexable insert lineup. For the full brand catalog, see our KORLOY brand page, or browse related insert families:
- All KORLOY grooving inserts — 148 products (GMM, CMW, slotting, parting)
- OYYU carbide inserts — our house brand alternative
- Best-selling carbide inserts across all brands
Talk to a Tooling Engineer
Not sure which FMM size fits your application? Need a KORLOY equivalent to a Sandvik / Mitsubishi / Iscar insert code?
- Email: chao@cnchome-beyond.com
- WhatsApp: +86 159-9066-3752