[PROJECT] Bridgeport Rebuild

[stevec]

(12-26-2016, 03:23 PM)awemawson Wrote: Setting work vertical using a box square

Setting castings horizontal on machinists jacks

... and many other situations where you need a reference plain

(12-25-2016, 11:44 AM)awemawson Wrote: It is very useful, when setting work out, to have the bed dead nuts on level. But if you don't have an accurate level anyway then it rules out using it for setting work up anyway. Find yourself a reasonable machinists level - after all they can be easily checked for accuracy by rotating 180 degrees, and most have some form of tweaking ability.

Sorry, but the way I see it, even if the mill and its bed are at some angle off "level", the relation of the bed to the head are the only things that have to be "dead nuts".
I'm trying to imagine a mill on board a naval vessel being dead nuts on level.

My mill table isn't "dead nuts on level" but it's tramed to be accurate as far as working to precision.

Or am I missing something ?