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

2.5mm 4-Flute R0.2mm Uncoated Solid Carbide Corner Radius End Millfor Aluminium & Non-Ferrous Fillet Milling

Name: 2.5mm 4-Flute R0.2mm Uncoated Corner Radius End Mill for Aluminium
Brand: Solid Carbide Direct
SKU: SCD-CREM-UNCOATED-4F-D25-R02-L7
Price: 7.69 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 2.5mmL2 7mmD2 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.

2.5mm 4F R0.2mm Uncoated

L2 7mm · 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 Radius	0.2 mm
Cutter Diameter (D1 h7)	2.5 mm
Flute Length (L2)	7 mm
Shank Diameter (D2 h6)	4 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 = 20.0×)
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

2.5mm

7mm

D2 h6

4mm

50mm

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.

ø2.5mm Applications

2.5mm 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: ø2.5mm 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 ø2.5mm Diameter, Other Radii