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

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

Name: 3mm 4-Flute R0.3mm Uncoated Corner Radius End Mill for Aluminium
Brand: Solid Carbide Direct
SKU: SCD-CREM-UNCOATED-4F-D3-R03-L8
Price: 4.98 USD
Availability: InStock

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 3mmL2 8mmD2 3mmOAL 50mm4 FlutesUncoatedNon-FerrousStandard ReachMOQ 1 pc

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Richtpreis

4,36 €

Richtpreis Werk (EUR)

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

3mm 4F R0.3mm Uncoated

L2 8mm · D2 3mm · 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 Radius	0.3 mm
Cutter Diameter (D1 h7)	3 mm
Flute Length (L2)	8 mm
Shank Diameter (D2 h6)	3 mm
Overall Length (L1)	50 mm
Number of Flutes	4
End Geometry	Corner Radius (Bull Nose)
Coating	Uncoated Bright polished
Max Material Hardness	N/A (non-ferrous optimised)
Reach Category	Standard (L1/D1 = 16.7×)
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

Uncoated · 4 Flute · Aluminium · R0.3mm

Corner R

0.3mm

D1 h7

3mm

8mm

D2 h6

3mm

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.

ø3mm Applications

3mm 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: ø3mm 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

Note: This diameter/radius/flute-length combination is available in 2 shank configurations:D2=3mm (OAL=50mm)D2=4mm (OAL=50mm). Specify shank diameter when ordering.

Same ø3mm Diameter, Other Radii