3-Point Leveling?

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I was watching some videos, and came across this from .On the thumbnail, there are some ball bearings shown...How would one go about leveling something using this three-point leveling method?I know a welding table and/or a flat surface is the correct way, yet I'd like to expand my knowledge.What are your thoughts?Thumbnail below:


Reply:The three points have nothing to do with level,, the three points are used to generate a FLAT areaThat flat area could be on the deck of the DD Class destroyer that I served on in the US Navy,,The three points of the balls would be flat, even though the ships deck is constantly rolling, and pitching,, (actually rolling to the side as much as 46 degrees,, I was on the ship when we took that roll)Anyways,, you can use something like the balls to generate a flat surface,, then use a tool like a transit to LEVEL that flat surface,,,(probably using a LOT of shims to get the surface level, depending on how big the surface is)


Reply:cool vide0 - that guy from fireball makes some awesome content, and I dig his approach and work method, in addition to having a very entertaining personality.The strap twist video was very interesting.I learned this 3 point level plane method as an old construction "trick".  We used to use 1/2 clear tube filled with water (add a little dishwashing soap to break the surface tension and get a more accurate reading) in addition to string levels.Any 3 points (A, B, and C) are always in plane with one another ("flat").To make said plane level:choose a single point.  point A.level point B to point A with a level (surprise), use a string level, i beam or box level, visual level like a transit, auto leveling laser, home made tube level (water in a clear tube), etc etc etc.Level point C to point A.  Cross check B and C being level with one another.You know have a flat plane that is level.Last edited by SlowBlues; 9 Hours Ago at 06:07 PM.