Spindle Speeds

[Clive S]

Thanks, The material is just standard aluminium 1/4 inch thick.. The bit is also 1/4 inch 2 flute carbide. The machine is a 6040, the spindle is a water cooled 2.2kw

There is a huge difference in the grades of aluminium from gummy to cast the grades have numbers like 6082.

The machining properties are different across the grades. Its the same with plastics and wood / MDF