4-Flute · nACo · R1mm · HRC65 · Standard Reach

14mm 4-Flute R1mm nACo Solid Carbide Corner Radius End Millfor HRC65 Hardened Steel

nACo (nano-AlCrN composite) corner radius end mills deliver the highest performance tier for hard milling in die steel, tool steel, and hardened components up to HRC65. The corner radius geometry is especially critical at high hardness — it eliminates the notching failure mode that destroys sharp-corner tools in hardened steel. Combined with nACo's 3,800 HV hardness and 1,100°C oxidation resistance, this tool enables dry semi-finish and finish passes in H13, P20, D2, and S7 mould steel directly after heat treatment.

R1mmD1 14mmL2 45mmD2 14mmOAL 100mm4 FlutesnACoHRC65Standard ReachMOQ 1 pc

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Cena referencyjna

634,78 zł

Cena ref. fabryki (PLN)

wg kosztu pręta na 2026-03-31. Wycena końcowa może się różnić.

nACo · 4 Flute · HRC65

14mm 4F R1mm nACo

L2 45mm · D2 14mm · OAL 100mm

Standard Reach · HRC65

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✓ Factory direct pricing

✓ MOQ 1 piece, ships 1–5 days

✓ Custom radius in 0.1mm increments

Full Dimensions

Technical Specifications

Corner Radius1 mm
Cutter Diameter (D1 h7)14 mm
Flute Length (L2)45 mm
Shank Diameter (D2 h6)14 mm
Overall Length (L1)100 mm
Number of Flutes4
End GeometryCorner Radius (Bull Nose)
CoatingnACo Nano-AlCrN composite
Max Material HardnessHRC65
Reach CategoryStandard (L1/D1 = 7.1×)
Helix Angle30°–35°
SubstrateK10/K20 Ultra-Fine Grain Carbide
Shank Toleranceh6
MOQ1 piece
Lead Time (standard)1–5 business days
Lead Time (custom)5–15 business days

nACo · 4 Flute · HRC65 · R1mm

14mm 4-flute R1mm nACo corner radius end mill — L2=45mm OAL=100mm
Corner R
1mm
D1 h7
14mm
L2
45mm
D2 h6
14mm
L1
100mm
Reach
Standard

R1mm Corner Geometry

General-purpose fillet milling — strongest corner geometry for heavy passes

  • ▸Maximum radial support on cutting edge during heavy DOC passes
  • ▸Ideal for semi-finish passes before a smaller-radius finishing pass
  • ▸Produces clean R1mm fillets in one pass — no secondary operation
  • ▸Recommended for die cast tooling, injection mould cores, and structural pockets
Radius Selection Tip: R1mm provides the highest edge strength of commonly used radii. In HRC65 steel, DOC can be increased 20–30% over R0.5mm without chatter. Use for semi-finish passes that must leave a consistent stock allowance before a ball-nose finish.

ø14mm Applications

14mm nACo — Where This Tool Fits

  • ▸Large die base and plate shoulder milling
  • ▸Heavy-duty structural pocket machining
  • ▸Pressure vessel and flange features
  • ▸Mining and energy equipment pockets
Machining Tip: ø14mm corner radius end mills generate high cutting forces. Minimum spindle power 15 kW in HRC65 steel. The corner radius at this scale carries a significant load — ensure machine toolpath generates consistent chip load using adaptive CAM strategies.

Coating Performance

nACo on Corner Radius Geometry

  • ▸nACo hardness > 3,800 HV — critical for corner edge stability in HRC65 steel
  • ▸Oxidation to 1,100°C — supports dry cutting in deep die pockets
  • ▸Corner radius + nACo eliminates notching failure common in hard milling
  • ▸Enables direct finish after heat treatment — skip grinding on mould steel
ISO HISO PnACo corner radius end mill HRC654 flute bull nose end mill hardened steelcorner radius carbide end mill hard millingradius end mill die steel HRC65

Same Dimensions, Other Coatings

ø14mm R1mm / L2 45mm — Other Variants

TiSiN · 4 Flute · HRC55
TiSiN · 4 Flute · HRC55
HRC55 · 4F · R1mm
Uncoated · 4 Flute · Aluminium
Uncoated · 4 Flute · Aluminium
Non-Ferrous · 4F · R1mm
ø12mm R1mm / L2 60mm← All Corner Radius End Millsø16mm R1mm / L2 45mm

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