[King Prout]

Then what was the relationship between speed and accuracy? As my Georgia Tech grads sis, brother in law, and future father in law have all noted: Speed decreases accuracy. This is a rule that any gun shows. Any multi-tasker can tell you as well. It's a principle of mechanics.

1. a hypersonic round is more accurate within its range than a subsonic round of the same mass
2. in machining (turning or milling) there is a range of optimal speeds, feeds, and angles for each kind of material for removing the desired chip profile and producing the desired surface on the workpiece. Too slow is just as bad as too fast.

[MacDorcha]

I wasn't aware of your first response, but your second one I can answer.

2. in machining (turning or milling) there is a range of optimal speeds, feeds, and angles for each kind of material for removing the desired chip profile and producing the desired surface on the workpiece. Too slow is just as bad as too fast.

I do a bit of turning myself, and while I can agree that the fastest safe speed is best, it also takes in to account angle and other factors on if its best. Cutting in to deep at a slow speed may nik the surface, but cutting to deep at too high a speed will destroy it.

So while it is easiest to cut, it also makes the risks higher, and if you don't control your hand VERY well at higher speeds, you may find yourself cutting several centimeters you hadn't intended to. This is due to the additional mechanics involved.