4-Flute · Uncoated · R0.3mm · Aluminium · Standard Reach

1.5mm 4-Flute R0.3mm Uncoated Solid Carbide Corner Radius End Millfor Aluminium & Non-Ferrous Fillet Milling

Uncoated (bright-polished) corner radius end mills are optimised for aluminium alloys, copper, brass, and graphite — any material where coatings cause adhesion. The corner radius produces clean fillet radii in pockets and profiles without a separate deburring step. Polished flute surfaces prevent built-up edge (BUE) that would otherwise ridge the fillet radius in soft metals. 4 flutes maximise feed rate and achieve Ra < 0.8µm in aluminium at high spindle speeds. Radius options from R0.2–R2.5mm cover all standard fillet requirements.

R0.3mmD1 1.5mmL2 4mmD2 4mmOAL 50mm4 FlutesUncoatedNon-FerrousStandard ReachMOQ 1 pc

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Reference price

$7.69

Ref. factory price (USD)

Based on rod stock cost as of 2026-03-31. Final quotation may differ.

Uncoated · 4 Flute · Aluminium

1.5mm 4F R0.3mm Uncoated

L2 4mm · D2 4mm · OAL 50mm

Standard Reach · Aluminium

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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 Radius0.3 mm
Cutter Diameter (D1 h7)1.5 mm
Flute Length (L2)4 mm
Shank Diameter (D2 h6)4 mm
Overall Length (L1)50 mm
Number of Flutes4
End GeometryCorner Radius (Bull Nose)
CoatingUncoated Bright polished
Max Material HardnessN/A (non-ferrous optimised)
Reach CategoryStandard (L1/D1 = 33.3×)
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

Uncoated · 4 Flute · Aluminium · R0.3mm

1.5mm 4-flute R0.3mm Uncoated corner radius end mill — L2=4mm OAL=50mm
Corner R
0.3mm
D1 h7
1.5mm
L2
4mm
D2 h6
4mm
L1
50mm
Reach
Standard

R0.3mm Corner Geometry

Light edge protection for tight-tolerance pocket corners

  • ▸Prevents corner micro-fracture in interrupted cuts
  • ▸Works within tight pocket radius tolerances (e.g. R0.3 ± 0.05mm)
  • ▸Preferred radius for watch and instrument component pockets
  • ▸Usable on features requiring clean corner breaks in cast iron
Radius Selection Tip: R0.3mm suits precision pockets where a larger radius would violate the design fillet spec. In aluminium alloy, this radius absorbs chip impact without generating visible corner burrs. Verify pocket design tolerance before specifying — most CAD models default to R0.5mm.

ø1.5mm Applications

1.5mm Uncoated — Where This Tool Fits

  • ▸Precision instrument and watch component features
  • ▸Medical device micro-pocket machining
  • ▸Die insert fine detail features
  • ▸Electronic connector pocket profiling
Machining Tip: ø1.5mm corner radius end mills need ≤ 0.003mm spindle runout. In aluminium alloy, use 0.01–0.04 mm/tooth chip load; the corner radius geometry reduces tool tip stress allowing slightly higher chip load than equivalent sharp-corner tools.

Coating Performance

Uncoated on Corner Radius Geometry

  • ▸Mirror-polished corner geometry — zero aluminium adhesion on curved arc
  • ▸Eliminates BUE that would deform fillet radius in soft alloys
  • ▸Clean fillet radii in aluminium — no post-milling deburring required
  • ▸Works in copper, brass, graphite, and CFRP composite materials
  • ▸Use with air blast or light oil mist at 10,000–30,000 RPM
ISO Nuncoated corner radius end mill aluminiumbull nose end mill non-ferrous4 flute radius end mill aluminiumcorner radius carbide end mill copper brass

Same ø1.5mm Diameter, Other Radii

Uncoated · 4 Flute · Aluminium — Other Corner Radii at ø1.5mm

R0.2mm
L2 4mm

Same Dimensions, Other Coatings

ø1.5mm R0.3mm / L2 4mm — Other Variants

TiSiN · 4 Flute · HRC55
TiSiN · 4 Flute · HRC55
HRC55 · 4F · R0.3mm
nACo · 4 Flute · HRC65
nACo · 4 Flute · HRC65
HRC65 · 4F · R0.3mm
ø12mm R0.2mm / L2 30mm← All Corner Radius End Millsø2mm R0.3mm / L2 6mm

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