4-Flute · Uncoated · R0.2mm · Aluminium · Standard Reach

4mm 4-Flute R0.2mm Uncoated Solid Carbide Corner Radius End Millfor Aluminium & Non-Ferrous Fillet Milling

Name: 4mm 4-Flute R0.2mm Uncoated Corner Radius End Mill for Aluminium
Brand: Solid Carbide Direct
SKU: SCD-CREM-UNCOATED-4F-D4-R02-L20
Price: 15.38 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.

R0.2mmD1 4mmL2 20mmD2 4mmOAL 100mm4 FlutesUncoatedNon-FerrousStandard ReachMOQ 1 pc

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Cena referencyjna

58,13 zł

Cena ref. fabryki (PLN)

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

4mm 4F R0.2mm Uncoated

L2 20mm · D2 4mm · OAL 100mm

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	0.2 mm
Cutter Diameter (D1 h7)	4 mm
Flute Length (L2)	20 mm
Shank Diameter (D2 h6)	4 mm
Overall Length (L1)	100 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 = 25.0×)
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 · R0.2mm

Corner R

0.2mm

D1 h7

4mm

20mm

D2 h6

4mm

100mm

Reach

Standard

R0.2mm Corner Geometry

Micro edge protection — minimal corner rounding for near-sharp corner features

▸Virtually sharp corner appearance while eliminating micro-chipping
▸Ideal where fillet radius tolerance is ± 0.05mm
▸Extends tool life vs true sharp-corner tools by 30–50%
▸Suitable for precision mould parting surfaces and embossed lettering

Radius Selection Tip: R0.2mm is the tightest corner radius standard. In aluminium alloy, the R0.2mm arc is small enough to appear visually sharp but prevents the notching failure that destroys zero-radius tools. Use identical step-over and depth parameters as you would for a square end mill.

ø4mm Applications

4mm Uncoated — Where This Tool Fits

▸Mould cavity pocket semi-finishing
▸Precision aerospace part profiling
▸Hydraulic manifold pocket corners
▸Small fixture and jig features

Machining Tip: ø4mm with corner radius provides the best size-to-stiffness ratio for die and mould work. In aluminium alloy, the corner radius allows 3–5×D axial depth without the micro-chipping that limits sharp-corner tools. Ideal for continuous shoulder milling passes.

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 Diameter & Radius, Different Reach