CNC Milling for Aluminum 6061-T6
Aluminum 6061 is one of the most popular materials for CNC milling due to its excellent machinability, good strength, and cost-effectiveness. It machines cleanly with minimal tool wear and produces an excellent surface finish.
Recommended Machining Parameters
| Parameter | Value |
|---|---|
| Achievable Tolerances | ±0.02 mm (±0.0008") |
| Surface Finish | Ra 0.4-1.6 μm |
| Cutting Speed | 200-400 m/min (SFM 650-1300) |
| Feed Rate | 0.05-0.15 mm/tooth |
| Tooling Recommendations | Carbide end mills with 2-3 flutes, uncoated or ZrN coated. HSS acceptable for prototyping. |
Expert Machining Tips
1
Use high spindle speeds (8,000-15,000 RPM) for optimal chip formation
2
Climb milling preferred for better surface finish
3
Use 3-flute end mills for efficient chip evacuation
4
Coolant recommended but not always required
5
Can achieve mirror finishes with proper parameters
Common Parts Made
Housings and enclosures
Brackets and mounting plates
Heat sinks
Structural frames
Jigs and fixtures
Machining Challenges
- Built-up edge at low speeds
- Material may gall on tool at insufficient chip load