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There are a lot of analogies I think

I chopped off that part of my post. Making a linear measurement is the easiest and most accurate kind available. And 3 decimals at 3 inches versus 3 decimals at 3 feet imply a lot less acuracy

if you have enough power, then I think you could do high speed and high load, but i think you might break something. there is certainly a time factor when discussing material 'failure'. Microseconds matter. At a certain point you are looking at something like the 'viscosity' of the metal

Our messages crossed mid flight, but that picture makes a lot of sense

re high pressure and low speed. Metals are composed of interlocking sets of crystals. When you 'cut' them, you are tearing some at the edge out of the main body. Work hardened material does not have clean edges between the edges of these crystals - they have been smashed together and are...

The key point about using a bar + trig is that you can use the larger size to improve your accuracy. And you can make the bar very long if you want versus the small dimension within the rotating part of a protractor (maybe 1" max?, but a bar could be feet long)

one think to note about that particular drill is that the two points won't line up and there will be two alternating profiles at the bottom of the hole. That means that neither insert will cut along the whole length of both leading edges. And more importantly, because they are not centered, no...

I think he is suggesting that the forward edge of the drill is like two inserts. Normally designed to cut on their points, they don't cut well on their long edges

I ate bad fish at lunch - i would trade my present condition for some varsol

I'm not really a hockey guy either, but I thought that the Leafs were well known enough to reference. As this is a metal working forum, mistaking a hockey team for some kind of formed metal is an easy thing to do