4-Flute · nACo · R2.5mm · HRC65 · Standard Reach

16mm 4-Flute R2.5mm nACo Solid Carbide Corner Radius End Millfor HRC65 Hardened Steel

Name: 16mm 4-Flute R2.5mm nACo Corner Radius End Mill for HRC65
Brand: Solid Carbide Direct
SKU: SCD-CREM-NACO-4F-D16-R25-L45
Price: 217.81 USD
Availability: InStock

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.

R2.5mmD1 16mmL2 45mmD2 16mmOAL 100mm4 FlutesnACoHRC65Standard ReachMOQ 1 pc

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Richtpreis

190,89 €

Richtpreis Werk (EUR)

Basierend auf Stabmaterial-Stand per 2026-03-31. Endgültiges Angebot kann abweichen.

16mm 4F R2.5mm nACo

L2 45mm · D2 16mm · 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 Radius	2.5 mm
Cutter Diameter (D1 h7)	16 mm
Flute Length (L2)	45 mm
Shank Diameter (D2 h6)	16 mm
Overall Length (L1)	100 mm
Number of Flutes	4
End Geometry	Corner Radius (Bull Nose)
Coating	nACo Nano-AlCrN composite
Max Material Hardness	HRC65
Reach Category	Standard (L1/D1 = 6.3×)
Helix Angle	30°–35°
Substrate	K10/K20 Ultra-Fine Grain Carbide
Shank Tolerance	h6
MOQ	1 piece
Lead Time (standard)	1–5 business days
Lead Time (custom)	5–15 business days

nACo · 4 Flute · HRC65 · R2.5mm

Corner R

2.5mm

D1 h7

16mm

45mm

D2 h6

16mm

100mm

Reach

Standard

R2.5mm Corner Geometry

Maximum standard corner radius — structural fillet finishing and heavy pocketing

▸Largest standard corner radius for high-load structural pockets
▸One tool for both side wall and corner fillet in a single pass
▸Reduces fillet machining time vs interpolated ball-nose strategy
▸Suitable for oil & gas, aerospace, and heavy equipment components

Radius Selection Tip: R2.5mm requires careful feeds and speeds management — the curved cutting edge geometry changes effective rake angle significantly across the arc. In HRC65 steel, use conservative feed (60–70% of square end mill equivalent) until material behaviour is confirmed.

ø16mm Applications

16mm 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: ø16mm 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 ø16mm Diameter, Other Radii