2-Flute · Uncoated · R4mm Ball · Aluminium · Standard Reach
8mm 2-Flute Uncoated Solid Carbide Ball Nose End Millfor Aluminium & Non-Ferrous 3D Surface Machining
Uncoated (bright-polished) ball nose end mills with 2 flutes are specifically optimised for high-speed 3D contouring in aluminium alloys, copper, graphite, and soft non-ferrous materials. The mirror-polished flute surface prevents built-up edge (BUE) that can degrade surface finish in soft metals. Large chip gullets ensure complete swarf evacuation even at spindle speeds above 20,000 RPM. Ideal for electrode machining (EDM graphite) and aluminium aerospace structural components.
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Richtpreis
49,12 €
Richtpreis Werk (EUR)
Basierend auf Stabmaterial-Stand per 2026-03-31. Endgültiges Angebot kann abweichen.
R4mm 2F Uncoated Ball Nose EM
L2 35mm · D2 8mm · OAL 100mm
Standard Reach · Aluminium
✓ Factory direct pricing
✓ MOQ 1 piece, ships 1–5 days
✓ Custom ball radii available
Full Dimensions
Technical Specifications
| Ball Radius (R) | 4 mm |
| Cutter Diameter (D1 h7) | 8 mm |
| Flute Length (L2) | 35 mm |
| Shank Diameter (D2 h6) | 8 mm |
| Overall Length (L1) | 100 mm |
| Number of Flutes | 2 |
| End Geometry | Ball Nose (Spherical) |
| Coating | Uncoated Bright polished |
| Max Material Hardness | N/A (non-ferrous optimised) |
| Reach Category | Standard (L1/D1 = 12.5×) |
| 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 · 2 Flute · Aluminium
Where This Tool Excels
R4mm Uncoated 2F — Recommended Applications
- ▸Large mould cavity semi-finish and finish passes
- ▸Automotive stamping die contouring
- ▸Compound curve aerospace structural parts
- ▸Forging die cavity profiling
3D Finishing Reference
Scallop Height vs Step-Over — R4mm
Residual scallop height (cusps) between adjacent tool paths, calculated for R4mm ball nose:
| Step-Over | Step-Over mm | Scallop Height (µm) | Typical Ra (µm) |
|---|---|---|---|
| 2% D1 | 0.16 | 0.8 | ≈ 0.16 |
| 5% D1 | 0.40 | 5.0 | ≈ 1.00 |
| 8% D1 | 0.64 | 12.8 | ≈ 2.56 |
| 10% D1 | 0.80 | 20.1 | ≈ 4.01 |
| 15% D1 | 1.20 | 45.3 | ≈ 9.05 |
| 20% D1 | 1.60 | 80.8 | ≈ 16.16 |
h = R − √(R² − (ae/2)²). Actual Ra depends on feed rate, chip load, and material.
Coating Performance
Uncoated — Why It Works for Ball-End Machining
- ▸Mirror-polished flute — zero aluminium adhesion on ball profile
- ▸Eliminates built-up edge (BUE) during high-speed aluminium contouring
- ▸Large chip gullets for clean swarf evacuation at 20,000+ RPM
- ▸Ideal for graphite electrode and EDM insert 3D profiles
- ▸Use with air blast or light oil mist — no flood coolant needed
Related Ball Nose Variants
Same Size in Other Coatings
Same Ball Radius, Different Reach
R4mm Uncoated · 2 Flute · Aluminium — Other Flute Lengths
Order R4mm 2-Flute Uncoated Ball Nose Today
Factory direct. MOQ 1 piece. Pricing confirmed within 4 hours.