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

12mm 4-Flute R0.3mm Uncoated Solid Carbide Corner Radius End Millfor Aluminium & Non-Ferrous Fillet Milling

Name: 12mm 4-Flute R0.3mm Uncoated Corner Radius End Mill for Aluminium
Brand: Solid Carbide Direct
SKU: SCD-CREM-UNCOATED-4F-D12-R03-L30
Price: 91.59 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 12mmL2 30mmD2 12mmOAL 75mm4 FlutesUncoatedNon-FerrousStandard ReachMOQ 1 pc

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Richtpreis

80,27 €

Richtpreis Werk (EUR)

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

12mm 4F R0.3mm Uncoated

L2 30mm · D2 12mm · OAL 75mm

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)	12 mm
Flute Length (L2)	30 mm
Shank Diameter (D2 h6)	12 mm
Overall Length (L1)	75 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 = 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

Uncoated · 4 Flute · Aluminium · R0.3mm

Corner R

0.3mm

D1 h7

12mm

30mm

D2 h6

12mm

75mm

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.

ø12mm Applications

12mm Uncoated — Where This Tool Fits

▸Large mould and die shoulder milling
▸Structural bracket and frame pocketing
▸Transmission case features
▸Wind turbine blade mould profiling

Machining Tip: ø12mm in aluminium alloy: use 0.5×D DOC for first passes to verify fixturing, then increase to 1×D for production. Corner radius is especially beneficial at this size where vibration-induced corner micro-chipping is common in hardened steel.

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 ø12mm Diameter, Other Radii