Quote Originally Posted by irving2008 View Post
The force needed to push the drill through the material is roughly 6N, and the cutting power about 10W. (yes its theoretical, Jazz)
Not getting into this other than to say my 2.2KW (2200W) WC spindle is rubbish for drilling above 6mm in Aluminium.? WHY . . because where talking about very different things really.!!

When it comes to actual "real" cutting then torque very much does matter but that's not to be confused with pushing force but torque the spindle produces.

So Irving your correct regards pushing figures not being too important but the F/S aren't really practicle in "real" terms because no one would want to drill aluminium @10mm/min.? G-wizzard actually gives 2900rpm and 200mm/min has a conservative feed rate.? . . . . I actually drill aluminium @ 4500rpm and peck drill @ 600mm/min so big difference's here compared to 10mm/min @ 5K rpm.?