Milling Ti-6Al-4V is one of the most challenging CNC operations due to titanium's low thermal conductivity, high strength, and chemical reactivity with cutting tools. Specialized techniques are essential.
| Parameter | Value |
|---|---|
| Achievable Tolerances | ±0.01 mm (±0.0004") |
| Surface Finish | Ra 0.8-3.2 μm |
| Cutting Speed | 30-60 m/min (SFM 100-200) |
| Feed Rate | 0.08-0.15 mm/tooth |
| Tooling Recommendations | Carbide with AlTiN or TiB2 coating. 4-5 flute variable helix. Consider ceramic end mills for roughing. |
Use very low cutting speeds to manage heat
High feed per tooth to maintain chip thickness
High-pressure through-spindle coolant is mandatory
Climb milling only — conventional milling causes severe rubbing
Use trochoidal milling for slots and pockets
Turbine blade blanks
Aerospace structural fittings
Medical implant components
Compressor housings
Motorsport brackets
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